/* ============================================================
   MathAnalysisAI · 深空控制台 (Cosmic Control Console)
   设计语言：Deep Space Blue-Black + Neon Teal/Violet
   ============================================================ */

/* === Design tokens === */

:root {
    /* Palette */
    --bg-0:            #05070f;
    --bg-1:            #0a0f1c;
    --bg-2:            #121a2c;

    --text:            #e8f0ff;
    --text-dim:        #8a95b3;
    --text-fade:       #4a5578;

    --accent:          #4fc3f7;       /* Electric Cyan-Blue */
    --accent-2:        #b388ff;       /* Holographic Violet */
    --accent-3:        #64ffda;       /* Neon Mint (success) */
    --accent-warm:     #ffd27a;       /* Pale Gold (accent only) */
    --danger:          #ff6b81;
    --warning:         #ffb86b;

    --border:          rgba(120, 160, 255, 0.18);
    --border-bright:   rgba(120, 200, 255, 0.45);
    --border-glow:     rgba(79, 195, 247, 0.35);

    --surface:         rgba(20, 26, 44, 0.55);
    --surface-2:       rgba(14, 20, 36, 0.75);

    --radius-sm:       8px;
    --radius:          12px;
    --radius-lg:       18px;
    --radius-xl:       26px;

    --shadow-1:        0 1px 0 rgba(255, 255, 255, 0.04) inset,
                        0 8px 32px -16px rgba(0, 20, 60, 0.5);
    --shadow-2:        0 1px 0 rgba(255, 255, 255, 0.05) inset,
                        0 20px 60px -20px rgba(0, 20, 60, 0.7);
    --shadow-glow:     0 0 0 1px var(--border-glow),
                        0 0 32px -6px rgba(79, 195, 247, 0.4);

    /* Typography */
    --font-sans:       "Inter", "PingFang SC", "Hiragino Sans GB",
                        "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    --font-display:    "Space Grotesk", "Inter", "PingFang SC", sans-serif;
    --font-mono:       "JetBrains Mono", "SF Mono", "Menlo", monospace;

    /* Spacing */
    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 24px;
    --sp-6: 32px;
    --sp-7: 48px;
    --sp-8: 72px;

    /* Semantic design-system tokens */
    --color-background: var(--bg-0);
    --color-surface: var(--surface);
    --color-surface-elevated: var(--surface-2);
    --color-primary: var(--accent);
    --color-secondary: var(--accent-2);
    --color-accent: var(--accent-3);
    --color-muted: var(--text-dim);
    --color-border: var(--border);
    --color-foreground: var(--text);
    --color-secondary-foreground: var(--text-dim);
    --color-success: #5bb98c;
    --color-warning: #d59b51;
    --color-error: var(--danger);
    --color-formula: #a9d7ff;
    --color-selection: rgba(79, 195, 247, 0.32);
    --color-focus: #78c8ff;
    --motion-duration-fast: 140ms;
    --motion-duration-normal: 220ms;
    --motion-easing-standard: cubic-bezier(0.2, 0.8, 0.2, 1);
    --content-width: 1180px;
    --sidebar-width: 280px;
    --formula-line-height: 1.8;
}

:root[data-theme="light"] {
    --bg-0: #f7f8fa;
    --bg-1: #eef1f5;
    --bg-2: #e3e8ef;
    --text: #17212b;
    --text-dim: #536273;
    --text-fade: #7c8998;
    --accent: #1769aa;
    --accent-2: #6650a4;
    --accent-3: #18795b;
    --danger: #b53d4d;
    --warning: #9a671f;
    --border: rgba(34, 55, 75, 0.16);
    --border-bright: rgba(23, 105, 170, 0.42);
    --border-glow: rgba(23, 105, 170, 0.24);
    --surface: rgba(255, 255, 255, 0.82);
    --surface-2: rgba(239, 243, 247, 0.92);
    --color-formula: #155b91;
    --color-focus: #1769aa;
    --shadow-1: 0 1px 2px rgba(35, 50, 65, 0.08), 0 8px 24px -16px rgba(35, 50, 65, 0.28);
    --shadow-2: 0 1px 2px rgba(35, 50, 65, 0.08), 0 20px 45px -24px rgba(35, 50, 65, 0.32);
}

/* === Reset & base === */

*, *::before, *::after { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--bg-0);
    min-height: 100%;
}

body {
    position: relative;
    background:
        radial-gradient(ellipse 1200px 700px at 85% -10%, rgba(179, 136, 255, 0.10), transparent 60%),
        radial-gradient(ellipse 1000px 600px at -10% 30%, rgba(79, 195, 247, 0.08), transparent 55%),
        radial-gradient(ellipse 800px 500px at 50% 110%, rgba(100, 255, 218, 0.05), transparent 60%),
        linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
    background-attachment: fixed;
    overflow-x: hidden;
}

:root[data-theme="light"] body {
    background: linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
}

:root[data-theme="light"] body::before,
:root[data-theme="light"] body::after { opacity: 0.25; }

/* Ultra-fine grid overlay for "console" feel */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(120, 160, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120, 160, 255, 0.04) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 30%, black 30%, transparent 90%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 30%, black 30%, transparent 90%);
    z-index: 0;
}

/* Very subtle vignette */
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(ellipse at 50% 50%, transparent 50%, rgba(5, 7, 15, 0.55) 100%);
    z-index: 0;
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    letter-spacing: -0.03em;
    color: var(--text);
    margin: 0 0 var(--sp-2) 0;
    font-weight: 700;
}

h1 { font-size: clamp(28px, 4vw, 44px); letter-spacing: -0.04em; font-weight: 800; }
h2 { font-size: clamp(20px, 2vw, 24px); font-weight: 700; }
h3 { font-size: 18px; }
h4 { font-size: 15px; color: var(--text-dim); }

p  { color: var(--text-dim); margin: 0 0 var(--sp-3) 0; }

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 160ms ease, text-shadow 160ms ease;
}
a:hover {
    color: var(--accent-3);
    text-shadow: 0 0 16px rgba(100, 255, 218, 0.35);
}

code, .mono {
    font-family: var(--font-mono);
    font-size: 0.92em;
    color: var(--accent-3);
    background: var(--surface-2);
    padding: 1px 6px;
    border-radius: 6px;
    border: 1px solid var(--border);
}

::selection {
    background: rgba(79, 195, 247, 0.32);
    color: #fff;
}

/* === Layout shell === */

.app-shell {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    padding-bottom: var(--sp-8);
}

.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--sp-5) var(--sp-5);
    position: relative;
    z-index: 2;
}

@media (max-width: 720px) {
    .container { padding: var(--sp-4) var(--sp-3); }
}

/* === Nav === */

.top-nav {
    display: flex;
    gap: var(--sp-3);
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    margin-bottom: var(--sp-6);
    border-radius: var(--radius-lg);
    background: rgba(12, 17, 30, 0.72);
    backdrop-filter: blur(28px) saturate(1.6);
    -webkit-backdrop-filter: blur(28px) saturate(1.6);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-1);
    position: sticky;
    top: calc(12px + env(safe-area-inset-top));
    z-index: 100;
}

.top-nav::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    border-radius: inherit;
    background: radial-gradient(ellipse 200% 150% at 50% -20%, rgba(79, 195, 247, 0.06), transparent 60%);
    pointer-events: none;
}

.top-nav-links {
    display: flex;
    gap: var(--sp-2);
    flex-wrap: wrap;
    align-items: center;
}

.top-nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--sp-1);
    padding: 8px 14px;
    border-radius: var(--radius);
    color: var(--text-dim);
    font-size: 14px;
    font-family: var(--font-display);
    letter-spacing: 0.01em;
    transition: color 160ms ease, background 160ms ease;
}

.top-nav-link::after {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 4px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 200ms ease, transform 200ms ease;
    border-radius: 2px;
}

.top-nav-link:hover {
    color: var(--text);
    background: linear-gradient(180deg, transparent, rgba(79, 195, 247, 0.10));
}

.top-nav-link:hover::after { opacity: 0.9; transform: translateY(0); }

.top-nav-link.is-active {
    color: var(--text);
}

.top-nav-link.is-active::after {
    opacity: 1;
    transform: translateY(0);
    background: linear-gradient(90deg, transparent, var(--accent-3), transparent);
}

.top-nav .brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.top-nav-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-3);
    flex: 1 1 auto;
    min-width: 0;
}

.top-nav-head-actions {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    flex-shrink: 0;
}

.top-nav .brand-link {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    font-size: 16.5px;
    color: var(--text);
    text-decoration: none;
    transition: color 160ms ease;
}

.top-nav .brand-link:hover {
    color: var(--accent);
    text-shadow: none;
}

.top-nav .brand-subtitle {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-fade);
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.top-nav .nav-links {
    display: flex;
    gap: var(--sp-1);
    flex-wrap: wrap;
    align-items: center;
}

.top-nav-current {
    display: none;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-fade);
    padding: 5px 8px;
    border: 1px solid var(--border);
    border-radius: 999px;
    max-width: 9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mobile-nav-toggle {
    display: none;
    min-height: 38px;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(10, 15, 28, 0.85);
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: none;
}

.mobile-nav-toggle:hover:not(:disabled) {
    transform: none;
    filter: none;
    box-shadow: none;
    background: rgba(79, 195, 247, 0.08);
    border-color: var(--border-bright);
}

.top-nav-auth-link {
    font-family: var(--font-display);
    font-size: 13px;
    color: var(--accent);
    padding: 6px 12px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: color 160ms ease, background 160ms ease, border-color 160ms ease;
    text-decoration: none;
}

.top-nav-auth-link:hover {
    color: var(--accent-3);
    border-color: var(--border-bright);
    background: rgba(100, 255, 218, 0.06);
}

.impersonate-switch {
    margin-left: 10px;
    padding: 5px 8px;
    font-family: var(--font-mono);
    font-size: 11px;
    background: rgba(10, 15, 28, 0.7);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--accent);
    cursor: pointer;
    outline: none;
}

.impersonate-switch:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--border-glow);
}

.access-denied-card {
    border-color: rgba(255, 107, 129, 0.3);
    background: rgba(255, 107, 129, 0.04);
}

.top-nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    font-size: 16px;
}

.top-nav-brand .brand-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent) 0%, var(--accent-2) 70%, transparent 100%);
    box-shadow: 0 0 12px var(--accent);
    animation: pulse-dot 3s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 8px var(--accent), 0 0 16px rgba(79, 195, 247, 0.4); }
    50%      { box-shadow: 0 0 16px var(--accent-3), 0 0 32px rgba(100, 255, 218, 0.45); }
}

.top-nav-user {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    font-size: 13px;
    color: var(--text-dim);
}

.top-nav-user-text {
    min-width: 0;
    line-height: 1.45;
}

.top-nav-user .user-role {
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 99px;
    border: 1px solid var(--border);
    color: var(--accent-3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* === Hero === */

.hero {
    position: relative;
    padding: var(--sp-7) var(--sp-6);
    margin-bottom: var(--sp-6);
    border-radius: var(--radius-xl);
    overflow: hidden;
    background:
        radial-gradient(ellipse 800px 300px at 80% 20%, rgba(179, 136, 255, 0.18), transparent 70%),
        radial-gradient(ellipse 700px 280px at 20% 80%, rgba(79, 195, 247, 0.15), transparent 70%),
        linear-gradient(135deg, rgba(20, 26, 44, 0.8), rgba(12, 17, 30, 0.9));
    border: 1px solid var(--border);
    box-shadow: var(--shadow-2);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

/* Diagonal thin grid on hero */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(45deg, rgba(120, 160, 255, 0.05) 1px, transparent 1px),
        linear-gradient(-45deg, rgba(120, 160, 255, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 90%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 90%);
    opacity: 0.7;
}

.hero-deco {
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-display);
    font-size: clamp(160px, 22vw, 320px);
    font-weight: 800;
    color: transparent;
    background: linear-gradient(135deg, rgba(79, 195, 247, 0.18), rgba(179, 136, 255, 0.14));
    -webkit-background-clip: text;
    background-clip: text;
    letter-spacing: -0.08em;
    user-select: none;
    pointer-events: none;
    line-height: 1;
    mix-blend-mode: screen;
    filter: blur(0.5px);
}

.hero-left { text-align: left; }

.hero h1 {
    position: relative;
    z-index: 2;
    margin-bottom: var(--sp-3);
    line-height: 1.15;
    max-width: 16ch;
}

.hero h1 .grad {
    background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    position: relative;
    z-index: 2;
    max-width: 48ch;
    color: var(--text-dim);
    font-size: 15.5px;
    line-height: 1.7;
}

.hero-kicker {
    position: relative;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    margin-bottom: var(--sp-4);
    border: 1px solid var(--border);
    border-radius: 99px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-3);
    background: rgba(100, 255, 218, 0.04);
}

.hero-kicker .live-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-3);
    box-shadow: 0 0 10px var(--accent-3);
    animation: pulse-dot 2.5s ease-in-out infinite;
}

.page-hero {
    padding: var(--sp-6) var(--sp-5);
}

.page-hero h1 {
    font-size: clamp(24px, 3vw, 34px);
    margin-bottom: var(--sp-2);
}

/* === Home landing hero === */

.hero-landing {
    position: relative;
    padding: var(--sp-8) var(--sp-7);
    margin-bottom: var(--sp-6);
    border-radius: var(--radius-xl);
    overflow: hidden;
    background:
        radial-gradient(ellipse 800px 380px at 85% 10%, rgba(179, 136, 255, 0.20), transparent 70%),
        radial-gradient(ellipse 700px 320px at 10% 90%, rgba(79, 195, 247, 0.18), transparent 70%),
        linear-gradient(135deg, rgba(20, 26, 44, 0.85), rgba(12, 17, 30, 0.9));
    border: 1px solid var(--border);
    box-shadow: var(--shadow-2);
}

.hero-landing::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(45deg, rgba(120, 160, 255, 0.05) 1px, transparent 1px),
        linear-gradient(-45deg, rgba(120, 160, 255, 0.04) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 75% 75% at 50% 50%, black 20%, transparent 90%);
    -webkit-mask-image: radial-gradient(ellipse 75% 75% at 50% 50%, black 20%, transparent 90%);
    pointer-events: none;
}

.hero-math-symbols {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.hero-math-symbol {
    position: absolute;
    font-family: var(--font-display);
    font-weight: 800;
    color: transparent;
    background: linear-gradient(135deg, rgba(79, 195, 247, 0.22), rgba(179, 136, 255, 0.18));
    -webkit-background-clip: text;
    background-clip: text;
    user-select: none;
    font-size: clamp(160px, 22vw, 320px);
    line-height: 1;
    mix-blend-mode: screen;
    filter: blur(0.5px);
}

.hero-math-symbol:nth-child(1) {
    top: 5%;
    right: 8%;
    font-size: clamp(200px, 28vw, 400px);
    background: linear-gradient(135deg, rgba(79, 195, 247, 0.26), rgba(100, 255, 218, 0.18));
    -webkit-background-clip: text;
    background-clip: text;
}

.hero-math-symbol:nth-child(2) {
    bottom: 10%;
    left: 5%;
    font-size: clamp(140px, 18vw, 260px);
    background: linear-gradient(135deg, rgba(179, 136, 255, 0.22), rgba(79, 195, 247, 0.15));
    -webkit-background-clip: text;
    background-clip: text;
}

.hero-math-symbol:nth-child(3) {
    top: 30%;
    right: 28%;
    font-size: clamp(100px, 14vw, 200px);
    background: linear-gradient(135deg, rgba(100, 255, 218, 0.2), rgba(179, 136, 255, 0.14));
    -webkit-background-clip: text;
    background-clip: text;
    opacity: 0.75;
}

.hero-landing-inner {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.hero-landing .hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    margin-bottom: var(--sp-5);
    border: 1px solid var(--border);
    border-radius: 99px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-3);
    background: rgba(100, 255, 218, 0.05);
}

.hero-landing .hero-kicker span {
    color: var(--text-fade);
    font-weight: 600;
    letter-spacing: 0.1em;
}

.hero-landing h1 {
    font-family: var(--font-display);
    font-size: clamp(26px, 3.5vw, 44px);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.15;
    color: var(--text);
    margin-bottom: var(--sp-3);
}

.hero-landing h1 .grad,
.hero-landing h1 em {
    font-style: normal;
    background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 60%, var(--accent-3) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-landing p {
    color: var(--text-dim);
    font-size: 15.5px;
    line-height: 1.75;
    max-width: 58ch;
    margin-bottom: var(--sp-5);
}

.hero-actions {
    display: flex;
    gap: var(--sp-3);
    flex-wrap: wrap;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 22px;
    border-radius: var(--radius);
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.01em;
    color: #001018;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    box-shadow: 0 12px 34px -12px rgba(79, 195, 247, 0.7);
    transition: transform 160ms ease, box-shadow 160ms ease, filter 160ms ease;
    text-decoration: none;
}

.hero-btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
    box-shadow: 0 18px 44px -14px rgba(79, 195, 247, 0.8);
}

.hero-btn-secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-bright);
    box-shadow: none;
}

.hero-btn-secondary:hover {
    background: rgba(79, 195, 247, 0.1);
    box-shadow: none;
    filter: none;
}

/* Primary callout card on home */
.feature-card-primary {
    grid-column: 1 / -1;
    background:
        radial-gradient(ellipse 500px 200px at 90% 10%, rgba(179, 136, 255, 0.12), transparent 70%),
        linear-gradient(160deg, rgba(20, 26, 44, 0.85), rgba(12, 17, 30, 0.85));
    border: 1px solid var(--border-bright);
}

.feature-card-primary .section-title {
    font-size: 18px;
    color: var(--accent);
}

.entry-copy {
    color: var(--text-dim);
    font-size: 14.5px;
    line-height: 1.75;
    margin: 0 0 var(--sp-4);
}

.entry-methods {
    display: flex;
    gap: var(--sp-2);
    flex-wrap: wrap;
    margin-bottom: var(--sp-5);
}

.entry-method-pill {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    padding: 5px 12px;
    border-radius: 99px;
    border: 1px solid var(--border);
    background: rgba(120, 160, 255, 0.06);
    color: var(--accent-3);
    text-transform: uppercase;
}

.entry-primary-btn {
    display: inline-flex;
}

.entry-link {
    font-family: var(--font-mono);
    font-size: 12px;
}

/* === Cards & panels === */

.card, .panel {
    position: relative;
    padding: var(--sp-5);
    margin-bottom: var(--sp-5);
    border-radius: var(--radius-lg);
    background: linear-gradient(160deg, rgba(20, 26, 44, 0.65), rgba(12, 17, 30, 0.6));
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-1);
    overflow: hidden;
    transition: border-color 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}

/* Top accent highlight line on every card */
.card::before, .panel::before {
    content: "";
    position: absolute;
    top: 0;
    left: 20px;
    right: 20px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent) 40%, var(--accent-2) 60%, transparent);
    opacity: 0.7;
}

.card:hover, .panel:hover {
    border-color: var(--border-bright);
    box-shadow: var(--shadow-1), 0 0 40px -16px rgba(79, 195, 247, 0.2);
}

.panel-header {
    margin-bottom: var(--sp-4);
}

.panel-header h2 {
    margin-bottom: 4px;
    font-size: 19px;
}

.panel-header p {
    margin: 0;
    font-size: 13.5px;
    color: var(--text-fade);
}

.result-panel {
    min-height: 300px;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text);
    margin: 0 0 var(--sp-4) 0;
    padding-bottom: var(--sp-3);
    border-bottom: 1px dashed var(--border);
}

.section-title::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 2px;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
}

.section-title-compact {
    margin-bottom: var(--sp-3);
    padding-bottom: var(--sp-2);
    font-size: 14px;
}

/* Feature cards on landing */
.feature-card {
    padding: var(--sp-5);
    border-radius: var(--radius-lg);
    background: linear-gradient(160deg, rgba(20, 26, 44, 0.8), rgba(12, 17, 30, 0.7));
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-1);
    position: relative;
    overflow: hidden;
    transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1),
                border-color 220ms ease,
                box-shadow 220ms ease;
}

.feature-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent) 30%, var(--accent-2) 70%, transparent);
}

.feature-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-bright);
    box-shadow: var(--shadow-2), 0 0 50px -20px rgba(79, 195, 247, 0.35);
}

.feature-card h3 {
    margin-bottom: var(--sp-2);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-card .feature-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    background: rgba(79, 195, 247, 0.1);
    border: 1px solid var(--border-bright);
    border-radius: 8px;
    letter-spacing: 0.05em;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--sp-4);
    margin-bottom: var(--sp-6);
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--sp-4);
}

.usage-item {
    padding: var(--sp-4);
    border-radius: var(--radius);
    background: var(--surface-2);
    border: 1px solid var(--border);
    transition: border-color 200ms ease, transform 200ms ease;
}

.usage-item:hover {
    border-color: var(--border-bright);
    transform: translateY(-2px);
}

.usage-item strong {
    display: block;
    color: var(--text);
    margin-bottom: var(--sp-2);
    font-family: var(--font-display);
    font-size: 15px;
}

.usage-item p {
    margin: 0 0 var(--sp-3) 0;
    font-size: 13.5px;
}

/* === Forms & buttons === */

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--sp-4);
    margin-bottom: var(--sp-4);
}

.form-grid .full { grid-column: 1 / -1; }
.form-grid .half { grid-column: span 1; }

@media (max-width: 640px) {
    .form-grid .half { grid-column: 1 / -1; }
}

label {
    display: block;
    margin-bottom: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="email"],
input[type="file"],
input[type="search"],
textarea,
select {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(10, 15, 28, 0.7);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
    outline: none;
}

input[type="file"] {
    padding: 8px 12px;
    cursor: pointer;
    background: rgba(10, 15, 28, 0.7);
}

input:hover, textarea:hover, select:hover {
    border-color: var(--border-bright);
}

input:focus, textarea:focus, select:focus {
    border-color: var(--accent);
    background: rgba(10, 15, 28, 0.92);
    box-shadow:
        0 0 0 1px rgba(79, 195, 247, 0.55),
        0 0 0 4px rgba(79, 195, 247, 0.12);
}

textarea {
    min-height: 120px;
    resize: vertical;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
}

input::placeholder, textarea::placeholder {
    color: var(--text-fade);
}

.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-wrapper input {
    padding-right: 42px;
}

.password-toggle {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-fade);
    cursor: pointer;
    padding: 0;
    box-shadow: none;
    transition: color 160ms ease, background 160ms ease;
}

.password-toggle:hover {
    color: var(--text);
    background: rgba(120, 160, 255, 0.08);
    transform: translateY(-50%);
    filter: none;
    box-shadow: none;
}

button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 20px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--accent) 0%, #2196f3 100%);
    color: #001018;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: transform 160ms ease, box-shadow 160ms ease, filter 160ms ease, border-color 160ms ease;
    box-shadow: 0 8px 24px -10px rgba(79, 195, 247, 0.7);
}

button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 14px 34px -10px rgba(79, 195, 247, 0.75),
                0 0 0 1px rgba(255, 255, 255, 0.15) inset;
    filter: brightness(1.06);
}

button:active:not(:disabled) {
    transform: translateY(0);
}

button:disabled {
    background: rgba(80, 90, 115, 0.5);
    color: var(--text-fade);
    cursor: not-allowed;
    box-shadow: none;
}

.btn-secondary,
button[type="button"].btn-secondary,
button.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: none;
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(79, 195, 247, 0.08);
    border-color: var(--border-bright);
    box-shadow: none;
    filter: none;
    transform: none;
}

.actions {
    display: flex;
    gap: var(--sp-3);
    align-items: center;
    flex-wrap: wrap;
    margin-top: var(--sp-4);
}

/* === Mode switch === */

.mode-switch {
    display: inline-flex;
    padding: 4px;
    border: 1px solid var(--border);
    border-radius: 99px;
    background: rgba(10, 15, 28, 0.6);
    margin-bottom: var(--sp-4);
}

.mode-switch-btn {
    position: relative;
    padding: 8px 18px;
    border-radius: 99px;
    background: transparent;
    color: var(--text-dim);
    border: none;
    font-family: var(--font-display);
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
    transition: color 180ms ease, background 220ms ease;
    box-shadow: none;
}

.mode-switch-btn:hover {
    color: var(--text);
    transform: none;
    filter: none;
    box-shadow: none;
}

.mode-switch-btn.is-active {
    color: #001018;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    box-shadow: 0 8px 22px -10px rgba(79, 195, 247, 0.7);
}

/* === Status, hints & messages === */

.status {
    color: var(--text-dim);
    font-size: 13px;
}

.status.error { color: var(--danger); }
.status.success { color: var(--accent-3); }

.status-chip {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 99px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    border: 1px solid var(--border);
    background: rgba(120, 160, 255, 0.06);
    color: var(--accent);
}

.hint {
    color: var(--text-fade);
    font-size: 13.5px;
    line-height: 1.65;
}

.status-message {
    padding: 10px 14px;
    border-radius: var(--radius);
    border: 1px dashed var(--border);
    background: rgba(79, 195, 247, 0.04);
    color: var(--text-dim);
    font-size: 13px;
}

.warning-hint {
    color: var(--warning);
}

.jump-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-3);
    border-bottom: 1px dashed rgba(100, 255, 218, 0.4);
    padding-bottom: 1px;
    transition: color 160ms ease, border-color 160ms ease;
}

.jump-link:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* Status pills for analysis results */
.result-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: 99px;
    border: 1px solid var(--border);
    background: rgba(120, 160, 255, 0.06);
    color: var(--text-dim);
}

.result-status-pill.correct {
    color: var(--accent-3);
    border-color: rgba(100, 255, 218, 0.35);
    background: rgba(100, 255, 218, 0.08);
}

.result-status-pill.partial {
    color: var(--warning);
    border-color: rgba(255, 184, 107, 0.35);
    background: rgba(255, 184, 107, 0.08);
}

.result-status-pill.incorrect {
    color: var(--danger);
    border-color: rgba(255, 107, 129, 0.35);
    background: rgba(255, 107, 129, 0.08);
}

.result-status-pill.unknown {
    color: var(--text-dim);
}

.result-status-pill::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 8px currentColor;
}

/* === Results & analysis === */

.result-section {
    margin-bottom: var(--sp-4);
    padding: var(--sp-4);
    border-radius: var(--radius);
    background: rgba(10, 15, 28, 0.5);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.result-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent), transparent);
    opacity: 0.8;
}

.result-section .kicker {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 4px;
}

.result-section h3 {
    margin: 0 0 var(--sp-2) 0;
    font-size: 17px;
}

.result-section p {
    margin: 0;
}

.result-section p + p { margin-top: 10px; }

.empty-state {
    padding: var(--sp-6) var(--sp-5);
    text-align: center;
    border-radius: var(--radius);
    border: 1px dashed var(--border);
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 14px,
        rgba(120, 160, 255, 0.03) 14px,
        rgba(120, 160, 255, 0.03) 28px
    );
}

.empty-state h3 {
    color: var(--text-dim);
    margin-bottom: var(--sp-2);
    font-weight: 600;
}

.empty-state p {
    margin: 0 auto;
    max-width: 42ch;
    font-size: 13.5px;
}

/* Streaming content */
.stream-block {
    font-family: var(--font-sans);
    font-size: 14.5px;
    line-height: 1.75;
    color: var(--text);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.stream-cursor {
    display: inline-block;
    width: 8px;
    height: 16px;
    margin-left: 2px;
    vertical-align: middle;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
    animation: cursor-blink 1.1s steps(2, start) infinite;
}

@keyframes cursor-blink {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0; }
}

.latex-display {
    display: block;
    padding: var(--sp-3) var(--sp-4);
    margin: var(--sp-2) 0;
    background: rgba(10, 15, 28, 0.8);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow-x: auto;
    color: var(--accent-3);
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
}

.error-message {
    padding: var(--sp-3);
    border-radius: var(--radius);
    background: rgba(255, 107, 129, 0.08);
    border: 1px solid rgba(255, 107, 129, 0.3);
    color: var(--danger);
    font-size: 13px;
}

/* === Workbench layout === */

.workbench-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: var(--sp-5);
}

.workbench-main { min-width: 0; }
.workbench-side { min-width: 0; }

@media (max-width: 960px) {
    .workbench-grid {
        grid-template-columns: 1fr;
    }
}

.upload-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-4);
    margin-bottom: var(--sp-3);
}

@media (max-width: 720px) {
    .upload-row { grid-template-columns: 1fr; }
}

/* OCR cards */
.ocr-review-card {
    padding: var(--sp-4);
    border-radius: var(--radius);
    background: rgba(10, 15, 28, 0.6);
    border: 1px solid var(--border);
    margin-top: var(--sp-4);
}

.ocr-formula-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--sp-3);
}

.ocr-formula-item {
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
    padding: var(--sp-3);
    border-radius: var(--radius-sm);
    background: rgba(20, 26, 44, 0.65);
    border: 1px solid var(--border);
}

.ocr-formula-meta {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-fade);
}

.ocr-formula-edit-hint,
.ocr-derived-note {
    color: var(--text-fade);
    font-size: 12px;
}

.ocr-formula-render,
.ocr-formula-preview {
    padding: var(--sp-3);
    border-radius: var(--radius-sm);
    background: rgba(10, 15, 28, 0.78);
    border: 1px solid rgba(145, 166, 255, 0.14);
    overflow-x: auto;
}

.ocr-formula-preview {
    min-height: 62px;
}

.analysis-text-preview-card {
    margin-top: var(--sp-3);
    padding: var(--sp-3);
    border-radius: var(--radius-sm);
    background: rgba(10, 15, 28, 0.45);
    border: 1px solid rgba(145, 166, 255, 0.12);
}

.analysis-text-preview {
    min-height: 54px;
    margin-top: var(--sp-2);
}

.math-rich-text {
    line-height: 1.8;
    white-space: normal;
    word-break: break-word;
}

.math-rich-text .MathJax,
.math-rich-text mjx-container,
.ocr-formula-preview .MathJax,
.ocr-formula-preview mjx-container,
.streaming-result-rendered .MathJax,
.streaming-result-rendered mjx-container {
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
}

.math-inline-fragment {
    display: inline;
}

.math-block-fragment {
    display: block;
    margin: var(--sp-2) 0;
}

.ocr-formula-card {
    padding: var(--sp-3);
    border-radius: var(--radius-sm);
    background: rgba(20, 26, 44, 0.65);
    border: 1px solid var(--border);
    transition: border-color 160ms ease, transform 160ms ease;
    cursor: pointer;
}

.ocr-formula-card:hover {
    border-color: var(--border-bright);
    transform: translateY(-2px);
}

.ocr-formula-card .ocr-formula-text {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-3);
    margin-bottom: var(--sp-2);
    word-break: break-all;
}

.ocr-formula-card small {
    color: var(--text-fade);
    font-size: 11px;
}

/* === Workflow steps === */

.workflow-steps {
    display: flex;
    gap: var(--sp-3);
    flex-wrap: wrap;
    margin: var(--sp-3) 0 var(--sp-5);
    position: relative;
}

.workflow-step {
    flex: 1;
    min-width: 140px;
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: var(--sp-3);
    border-radius: var(--radius);
    background: rgba(10, 15, 28, 0.5);
    border: 1px solid var(--border);
    transition: border-color 220ms ease, background 220ms ease;
}

.workflow-step.complete {
    border-color: rgba(100, 255, 218, 0.4);
    background: rgba(100, 255, 218, 0.05);
}

.workflow-step.active {
    border-color: rgba(79, 195, 247, 0.5);
    background: rgba(79, 195, 247, 0.08);
    box-shadow: 0 0 32px -12px rgba(79, 195, 247, 0.35);
}

.workflow-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    background: rgba(79, 195, 247, 0.1);
    border: 1px solid var(--border-bright);
    flex-shrink: 0;
}

.workflow-step.complete .workflow-step-num {
    color: var(--accent-3);
    background: rgba(100, 255, 218, 0.08);
    border-color: rgba(100, 255, 218, 0.45);
}

.workflow-step-label {
    font-family: var(--font-display);
    font-size: 13.5px;
    color: var(--text);
    line-height: 1.3;
}

.workflow-step-label small {
    display: block;
    color: var(--text-fade);
    font-family: var(--font-mono);
    font-size: 11px;
    margin-top: 2px;
}

/* === Stats / data === */

.stats-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--sp-3);
}

.stats-summary-item {
    padding: var(--sp-4);
    border-radius: var(--radius);
    background: linear-gradient(160deg, rgba(20, 26, 44, 0.8), rgba(12, 17, 30, 0.7));
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.stats-summary-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-2), transparent);
    opacity: 0.6;
}

.stats-summary-item .label {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-fade);
    margin-bottom: var(--sp-2);
}

.stats-summary-item .value {
    display: block;
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 700;
    line-height: 1.1;
    color: transparent;
    background: linear-gradient(120deg, var(--text) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    letter-spacing: -0.02em;
}

.stats-summary-item .sub {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-fade);
}

.chart-container {
    position: relative;
    padding: var(--sp-3);
    background: rgba(10, 15, 28, 0.5);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

/* Knowledge items / progress */
.knowledge-point-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--sp-3);
    align-items: center;
    padding: var(--sp-3) var(--sp-4);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: rgba(10, 15, 28, 0.4);
    margin-bottom: var(--sp-2);
}

.knowledge-point-row .name {
    color: var(--text);
    font-family: var(--font-display);
    font-size: 14px;
}

.knowledge-point-row .count {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-3);
    letter-spacing: 0.04em;
}

.progress-bar-outer {
    height: 6px;
    border-radius: 99px;
    background: rgba(120, 160, 255, 0.12);
    overflow: hidden;
    margin-top: 8px;
}

.progress-bar-inner {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    border-radius: 99px;
    box-shadow: 0 0 12px -2px rgba(79, 195, 247, 0.55);
}

/* === Materials page === */

.materials-pane {
    animation: fade-in 220ms ease;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.materials-filter-grid {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: var(--sp-4);
    align-items: end;
    margin-bottom: var(--sp-4);
}

@media (max-width: 720px) {
    .materials-filter-grid { grid-template-columns: 1fr; }
}

.materials-filter-actions {
    display: flex;
    gap: var(--sp-3);
    align-items: center;
    flex-wrap: wrap;
}

/* === Login === */

.login-centered {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--sp-5);
}

.login-card {
    position: relative;
    width: 100%;
    max-width: 460px;
    padding: var(--sp-7) var(--sp-6);
    border-radius: var(--radius-xl);
    background:
        radial-gradient(ellipse 400px 300px at 80% -10%, rgba(179, 136, 255, 0.18), transparent 70%),
        radial-gradient(ellipse 400px 300px at 0% 110%, rgba(79, 195, 247, 0.15), transparent 70%),
        linear-gradient(160deg, rgba(20, 26, 44, 0.9), rgba(12, 17, 30, 0.92));
    border: 1px solid var(--border);
    box-shadow: var(--shadow-2), 0 0 120px -30px rgba(79, 195, 247, 0.35);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    overflow: hidden;
}

.login-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
    opacity: 0.8;
}

.login-card h2 {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 4px;
    background: linear-gradient(120deg, var(--text) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.login-brand-sub {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-fade);
    margin-bottom: var(--sp-5);
}

/* === Animations === */

.fade-up {
    animation: fade-up 380ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stagger on feature grid children */
.feature-grid > .feature-card { animation: fade-up 480ms cubic-bezier(0.2, 0.8, 0.2, 1) both; }
.feature-grid > .feature-card:nth-child(1) { animation-delay: 40ms; }
.feature-grid > .feature-card:nth-child(2) { animation-delay: 100ms; }
.feature-grid > .feature-card:nth-child(3) { animation-delay: 160ms; }
.feature-grid > .feature-card:nth-child(4) { animation-delay: 220ms; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    body::before, body::after { display: none; }
}

/* === Responsive tweaks === */

@media (max-width: 720px) {
    .hero {
        padding: var(--sp-6) var(--sp-4);
    }
    .hero-landing {
        padding: var(--sp-7) var(--sp-5);
    }
    .hero-deco { font-size: 140px; right: -40px; }
    .card, .panel { padding: var(--sp-4); }
    .feature-grid { grid-template-columns: 1fr; }
}

/* === Layout utilities specific to home === */

.feature-grid-home {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--sp-4);
    margin-bottom: var(--sp-6);
}

.page-note {
    background: rgba(20, 26, 44, 0.5);
    border: 1px dashed var(--border);
}

/* === Footer === */

.app-footer {
    margin-top: var(--sp-7);
    padding: var(--sp-5) 0 var(--sp-4) 0;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-fade);
    border-top: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

.footer-content {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-3);
    flex-wrap: wrap;
    justify-content: center;
}

.footer-icp,
.footer-police {
    color: var(--text-fade);
    transition: color 160ms ease;
}

.footer-icp a,
.footer-police a {
    color: var(--text-dim);
    text-decoration: none;
    transition: color 160ms ease;
}

.footer-icp a:hover,
.footer-police a:hover {
    color: var(--accent);
}

.footer-divider {
    color: var(--border);
    user-select: none;
}

/* MathLive override to match theme */
.mathlive-input {
    background: rgba(10, 15, 28, 0.85);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
}

/* Chart.js canvas — ensure legible font fallback */
canvas { display: block; max-width: 100%; }

/* === Analysis page: streaming / result styling === */

.streaming-container {
    padding: var(--sp-5);
    border-radius: var(--radius);
    background: rgba(10, 15, 28, 0.6);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.streaming-container::before {
    content: "";
    position: absolute;
    top: 0; left: 20%; right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.5;
}

.streaming-indicator {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-3);
    margin-bottom: var(--sp-3);
}

.streaming-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-3);
    box-shadow: 0 0 12px var(--accent-3);
    animation: pulse-dot 1.8s ease-in-out infinite;
}

.streaming-content {
    font-family: var(--font-sans);
    font-size: 14.5px;
    line-height: 1.8;
    color: var(--text);
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 0;
}

.streaming-result-raw {
    padding: var(--sp-4);
    border-radius: var(--radius);
    background: rgba(10, 15, 28, 0.5);
    border: 1px dashed var(--border);
    margin-top: var(--sp-3);
}

.streaming-result-rendered {
    margin-top: var(--sp-3);
}

.math-rendered-content {
    line-height: 1.85;
}

.result-summary-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    margin-top: var(--sp-3);
    font-size: 12.5px;
    color: var(--text-fade);
}

@media (max-width: 768px) {
    .top-nav {
        display: block;
        padding: 12px 14px;
        margin-bottom: var(--sp-4);
    }

    .top-nav .brand-subtitle {
        display: none;
    }

    .top-nav-current,
    .mobile-nav-toggle {
        display: inline-flex;
    }

    .top-nav.nav-collapsed .nav-links,
    .top-nav.nav-collapsed .top-nav-user {
        width: 100%;
        margin-top: var(--sp-3);
    }

    .top-nav.nav-collapsed .nav-links {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .top-nav.nav-collapsed .top-nav-link {
        width: 100%;
        justify-content: flex-start;
        padding: 10px 12px;
        background: rgba(10, 15, 28, 0.45);
    }

    .top-nav.nav-collapsed .top-nav-user {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding-top: var(--sp-3);
        border-top: 1px solid var(--border);
    }

    .top-nav.nav-collapsed .top-nav-auth-link {
        width: 100%;
        min-height: 40px;
        justify-content: center;
        text-align: center;
    }

    .top-nav.nav-collapsed .impersonate-switch {
        width: 100%;
        margin-left: 0;
        min-height: 40px;
    }

    body.analysis-page {
        padding-bottom: calc(24px + env(safe-area-inset-bottom));
        overflow-x: hidden;
    }

    .analysis-page .app-shell {
        min-height: 100dvh;
        padding-bottom: calc(var(--sp-7) + env(safe-area-inset-bottom));
    }

    .analysis-page .container {
        max-width: 100%;
        padding: var(--sp-3);
        padding-bottom: calc(var(--sp-6) + env(safe-area-inset-bottom));
    }

    .analysis-page main {
        padding-bottom: calc(var(--sp-6) + env(safe-area-inset-bottom));
    }

    .analysis-page .page-hero {
        padding: var(--sp-5) var(--sp-4);
        margin-bottom: var(--sp-4);
    }

    .analysis-page .page-hero h1 {
        font-size: 24px;
    }

    .analysis-page .workbench-grid {
        gap: var(--sp-4);
    }

    .analysis-page .panel,
    .analysis-page .card {
        padding: var(--sp-4);
        margin-bottom: var(--sp-4);
    }

    .analysis-page .panel::before,
    .analysis-page .card::before {
        left: 14px;
        right: 14px;
    }

    .analysis-page .panel-header {
        margin-bottom: var(--sp-3);
    }

    .analysis-page .panel-header p,
    .analysis-page .hint,
    .analysis-page .status-message {
        font-size: 13px;
    }

    .analysis-page .form-grid,
    .analysis-page .upload-row {
        grid-template-columns: 1fr;
        gap: var(--sp-3);
    }

    .analysis-page .mode-switch {
        display: flex;
        width: 100%;
        border-radius: var(--radius);
    }

    .analysis-page .mode-switch-btn {
        flex: 1 1 0;
        justify-content: center;
        padding: 10px 12px;
    }

    .analysis-page .actions {
        flex-direction: column;
        align-items: stretch;
        gap: var(--sp-2);
    }

    .analysis-page .actions > button,
    .analysis-page .actions > .btn,
    .analysis-page .actions > .btn-secondary,
    .analysis-page .actions > a {
        width: 100%;
    }

    .analysis-page .actions > .status,
    .analysis-page .actions > .hint {
        width: 100%;
        margin: 0;
    }

    .analysis-page textarea,
    .analysis-page select,
    .analysis-page input[type="text"],
    .analysis-page input[type="file"] {
        font-size: 16px;
    }

    .analysis-page textarea {
        min-height: 132px;
    }

    .analysis-page .ocr-formula-list {
        grid-template-columns: 1fr;
    }

    .analysis-page .result-panel {
        min-height: 0;
    }

    .analysis-page .result-summary-meta {
        flex-direction: column;
        gap: 6px;
    }
}

.streaming-content-raw {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--text-dim);
    line-height: 1.7;
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 0;
}

/* === Stats page: summary cards === */

.stats-card {
    padding: var(--sp-5) var(--sp-4);
    border-radius: var(--radius);
    background: linear-gradient(160deg, rgba(20, 26, 44, 0.85), rgba(12, 17, 30, 0.75));
    border: 1px solid var(--border);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.stats-card::before {
    content: "";
    position: absolute;
    top: 0; left: 20%; right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-2), transparent);
    opacity: 0.7;
}

.stats-card-value {
    display: block;
    font-family: var(--font-display);
    font-size: 34px;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--text);
    margin-bottom: 8px;
}

.stats-card-value.correct,
.stats-card-value.high {
    background: linear-gradient(120deg, var(--accent-3) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stats-card-value.mid {
    background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stats-card-value.low {
    background: linear-gradient(120deg, var(--warning) 0%, var(--danger) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stats-card-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-fade);
}

/* === Stats page: course progress === */

.course-progress-list {
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
}

.course-progress-item {
    padding: var(--sp-3) var(--sp-4);
    border-radius: var(--radius);
    background: rgba(10, 15, 28, 0.6);
    border: 1px solid var(--border);
    transition: border-color 180ms ease, transform 180ms ease;
}

.course-progress-item:hover {
    border-color: var(--border-bright);
    transform: translateX(2px);
}

.course-progress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    gap: var(--sp-3);
}

.course-progress-name {
    font-family: var(--font-display);
    font-size: 15px;
    color: var(--text);
}

.course-progress-bar-track {
    height: 6px;
    border-radius: 99px;
    background: rgba(120, 160, 255, 0.1);
    overflow: hidden;
    position: relative;
}

.course-progress-bar-fill {
    height: 100%;
    border-radius: 99px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    box-shadow: 0 0 12px -2px rgba(79, 195, 247, 0.55);
    transition: width 400ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.course-progress-meta {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-fade);
    letter-spacing: 0.08em;
}

/* === Leaderboard === */

.leaderboard-hero-text {
    color: var(--text-dim);
    font-size: 15px;
    line-height: 1.75;
    margin: 0;
    max-width: 60ch;
}

.rank-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 14px;
    margin-top: 8px;
}

.rank-table thead th {
    text-align: left;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-fade);
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

.rank-table tbody td {
    padding: 12px;
    color: var(--text-dim);
    border-bottom: 1px solid rgba(120, 160, 255, 0.08);
    font-family: var(--font-sans);
}

.rank-table tbody tr:hover td {
    background: rgba(79, 195, 247, 0.04);
    color: var(--text);
}

/* === Workflow: number badge === */

.workflow-step-no,
.workflow-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    background: rgba(79, 195, 247, 0.1);
    border: 1px solid var(--border-bright);
    flex-shrink: 0;
}

/* Generic utility spacing for JS-inserted content */
.space-y > * + * { margin-top: var(--sp-3); }
.mt-2 { margin-top: var(--sp-2); }
.mt-3 { margin-top: var(--sp-3); }
.mt-4 { margin-top: var(--sp-4); }
.mt-5 { margin-top: var(--sp-5); }
.mb-3 { margin-bottom: var(--sp-3); }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-5 { margin-bottom: var(--sp-5); }

/* === Local UI primitives: quiet learning system === */

:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--color-focus) 68%, transparent);
    outline-offset: 3px;
}

.theme-toggle {
    min-height: 36px;
    padding: 7px 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 600;
}

.ui-card {
    padding: var(--sp-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    box-shadow: var(--shadow-1);
}

.ui-badge,
.knowledge-point-tag {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 3px 9px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    color: var(--color-secondary-foreground);
    background: var(--color-surface-elevated);
    font-size: 12px;
    line-height: 1.3;
}

.ui-progress {
    height: 8px;
    overflow: hidden;
    border-radius: 999px;
    background: var(--color-surface-elevated);
}

.ui-progress > span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: var(--color-primary);
    transition: width var(--motion-duration-normal) var(--motion-easing-standard);
}

.ui-skeleton {
    min-height: 1em;
    border-radius: var(--radius-sm);
    background: linear-gradient(90deg, var(--color-surface-elevated), var(--color-surface), var(--color-surface-elevated));
    background-size: 200% 100%;
    animation: ui-skeleton-shimmer 1.5s linear infinite;
}

@keyframes ui-skeleton-shimmer {
    to { background-position: -200% 0; }
}

.ui-empty-state,
.ui-loading-state,
.ui-error-state {
    padding: var(--sp-5);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface-elevated);
}

.ui-error-state { border-color: color-mix(in srgb, var(--color-error) 45%, var(--color-border)); }
.ui-loading-state { color: var(--color-secondary-foreground); }

.formula-block {
    position: relative;
    max-width: 100%;
    margin-top: var(--sp-4);
    padding: var(--sp-4);
    overflow-x: auto;
    border-left: 3px solid var(--color-formula);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--color-formula);
    background: color-mix(in srgb, var(--color-formula) 8%, var(--color-surface-elevated));
    font-family: var(--font-mono);
    line-height: var(--formula-line-height);
}

.formula-copy-button {
    float: right;
    min-height: 30px;
    padding: 4px 9px;
    font-family: var(--font-sans);
    font-size: 11px;
}

.conversation-message {
    max-width: 72ch;
}

.assistant-message { border-left: 3px solid var(--color-primary); }
.message-role {
    display: block;
    margin-bottom: var(--sp-2);
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

@media (prefers-reduced-motion: reduce) {
    .ui-skeleton { animation: none; }
    .ui-progress > span { transition: none; }
}

@media (max-width: 720px) {
    .top-nav-head-actions { gap: var(--sp-2); }
    .theme-toggle { order: 1; }
    .mobile-nav-toggle { order: 2; }
    .formula-block { font-size: 13px; }
}

/* === Streaming analysis semantic components === */

.analysis-render-shell {
    display: grid;
    gap: var(--sp-3);
}

.analysis-render-status {
    color: var(--color-secondary-foreground);
    font-size: 13px;
}

.analysis-loading-state {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    min-height: 48px;
}

.analysis-loading-indicator {
    width: 10px;
    height: 10px;
    flex: 0 0 auto;
    border-radius: 50%;
    background: var(--color-primary);
    animation: analysis-loading-pulse 1.2s ease-in-out infinite;
}

@keyframes analysis-loading-pulse {
    50% { opacity: 0.35; }
}

.analysis-sections,
.analysis-steps {
    display: grid;
    gap: var(--sp-3);
}

.analysis-section,
.analysis-step,
.analysis-insight-block,
.analysis-warning-block,
.analysis-conclusion-block,
.analysis-error-state {
    padding: var(--sp-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    box-shadow: var(--shadow-1);
}

.analysis-section[data-section-kind="warning"],
.analysis-warning-block { border-left: 3px solid var(--color-warning); }

.analysis-section[data-section-kind="conclusion"],
.analysis-conclusion-block { border-left: 3px solid var(--color-success); }

.analysis-section-header,
.analysis-step-header {
    display: flex;
    align-items: baseline;
    gap: var(--sp-2);
    flex-wrap: wrap;
}

.analysis-section-kicker,
.analysis-block-kicker,
.analysis-field-label {
    color: var(--color-muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.analysis-section-title,
.analysis-step-title,
.analysis-block-title,
.analysis-insight-title {
    margin: 0;
    color: var(--color-foreground);
}

.analysis-section-title { flex: 1 1 15rem; font-size: 18px; }
.analysis-step-title { flex: 1 1 12rem; font-size: 15px; }
.analysis-block-title,
.analysis-insight-title { font-size: 16px; }

.analysis-state-badge,
.analysis-step-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 26px;
    min-height: 26px;
    padding: 3px 8px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    color: var(--color-primary);
    background: var(--color-surface-elevated);
    font-size: 12px;
}

.analysis-section-content,
.analysis-step-description,
.analysis-rich-content,
.analysis-insight-summary,
.analysis-warning-content,
.analysis-conclusion-content,
.analysis-error-message {
    margin-top: var(--sp-3);
    color: var(--color-foreground);
    line-height: 1.75;
    overflow-wrap: anywhere;
}

.analysis-step-description,
.analysis-step-evidence,
.analysis-insight-headline { margin-top: var(--sp-3); }
.analysis-step-evidence { color: var(--color-secondary-foreground); font-size: 13px; }
.analysis-step-evidence::before { content: ""; }

.derivation-flow {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: var(--sp-3);
    margin-top: var(--sp-3);
}

.derivation-expression {
    min-width: 0;
    padding: var(--sp-3);
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface-elevated);
}

.derivation-relation {
    color: var(--color-primary);
    font-weight: 700;
    white-space: nowrap;
}

.analysis-insight-block { border-left: 3px solid var(--color-primary); }
.analysis-insight-list { margin: var(--sp-3) 0 0; padding-left: 1.25rem; color: var(--color-foreground); }
.analysis-insight-point + .analysis-insight-point { margin-top: var(--sp-2); }
.analysis-error-state { border-color: color-mix(in srgb, var(--color-error) 48%, var(--color-border)); border-left: 3px solid var(--color-error); }
.analysis-state-actions { display: flex; gap: var(--sp-2); margin-top: var(--sp-4); }
.analysis-cancel-button { margin-left: auto; }
.is-formula-fallback { white-space: pre-wrap; overflow-wrap: anywhere; }

.analysis-cognitive-root[data-runtime-phase="error"] .analysis-render-status { color: var(--color-error); }
.analysis-cognitive-root[data-runtime-phase="cancelled"] .analysis-render-status { color: var(--color-warning); }
.analysis-section.is-dimmed,
.analysis-step.is-dimmed { opacity: 0.58; }
.analysis-section.is-active { border-color: var(--border-bright); }
.analysis-step.is-muted { opacity: 0.34; filter: saturate(0.82); }
.analysis-section.is-perception-active { transform: translateY(-2px); }
.analysis-insight-host.has-steps { margin-top: var(--sp-2); }
.analysis-motion-enter { animation: analysis-motion-enter 320ms var(--motion-easing-standard) both; }

@keyframes analysis-motion-enter {
    from { opacity: 0.25; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
    .analysis-loading-indicator { animation: none; }
    .analysis-section,
    .analysis-step,
    .analysis-motion-enter { transition: none; animation: none; }
}

@media (max-width: 640px) {
    .derivation-flow { grid-template-columns: 1fr; }
    .derivation-relation { justify-self: start; }
    .analysis-state-actions { flex-wrap: wrap; }
    .analysis-cancel-button { margin-left: 0; }
}

/* Analysis manuscript workspace: local scope keeps legacy pages unchanged. */
.analysis-page .workbench-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr);
    gap: clamp(24px, 4vw, 64px);
    align-items: start;
    max-width: 1380px;
    margin-inline: auto;
}

.analysis-page .workbench-main,
.analysis-page .workbench-side,
.analysis-page .analysis-manuscript-pane { min-width: 0; }

.analysis-page .workbench-main > .analysis-manuscript-pane > .panel,
.analysis-page .workbench-side > .panel {
    padding: 0;
    margin: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
}

.analysis-page .workbench-main > .analysis-manuscript-pane > .panel::before,
.analysis-page .workbench-side > .panel::before { display: none; }

.analysis-page .workbench-main > .analysis-manuscript-pane > .panel + .panel {
    margin-top: clamp(28px, 4vw, 48px);
    padding-top: clamp(20px, 3vw, 32px);
    border-top: 1px solid var(--border);
}

.analysis-page .panel-header h2 { color: var(--text); }
.analysis-page #analysis-root > .panel-header { margin-bottom: var(--sp-5); }
.analysis-page #analysis-root > .panel-header p { max-width: 54ch; line-height: 1.65; }

.analysis-page .analysis-text-preview-card {
    padding: var(--sp-2) 0 0;
    border: 0;
    border-radius: 0;
    background: transparent;
}

.analysis-page .analysis-text-preview {
    max-height: 190px;
    overflow: auto;
    overflow-wrap: anywhere;
    color: var(--text);
}

.analysis-page .analysis-text-preview mjx-container,
.analysis-page .analysis-text-preview .MathJax,
.analysis-page .ocr-formula-preview mjx-container,
.analysis-page .ocr-formula-preview .MathJax,
.analysis-page .math-rich-text mjx-container,
.analysis-page .math-rich-text .MathJax {
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
}

.analysis-page #ocrWorkbenchCard {
    padding: var(--sp-4) 0;
    border: 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.analysis-page #ocrWorkbenchCard::before { display: none; }
.analysis-page #ocrWorkbenchCard[style*="display: block"] + .panel { margin-top: var(--sp-5); }

.analysis-page .analysis-pane-switch { display: none; }

.analysis-page .analysis-cognitive-root,
.analysis-page #resultContainer {
    min-width: 0;
    max-width: 100%;
    overflow-wrap: anywhere;
}

.analysis-page .analysis-section + .analysis-section,
.analysis-page .result-section + .result-section { margin-top: var(--sp-5); }

.analysis-page .solution-step-card + .solution-step-card,
.analysis-page .analysis-step + .analysis-step { margin-top: var(--sp-3); }

@media (max-width: 960px) {
    .analysis-page .workbench-grid { grid-template-columns: minmax(0, 1fr); }
    .analysis-page .analysis-pane-switch {
        display: grid;
        grid-column: 1 / -1;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 4px;
        padding: 4px;
        border: 1px solid var(--border);
        border-radius: 999px;
        background: var(--surface-2);
    }
    .analysis-page .analysis-pane-switch button {
        min-height: 44px;
        padding: 8px 12px;
        border: 0;
        border-radius: 999px;
        background: transparent;
        color: var(--text-dim);
        box-shadow: none;
    }
    .analysis-page .analysis-pane-switch button[aria-selected="true"] {
        background: var(--surface);
        color: var(--text);
        box-shadow: 0 1px 4px rgba(0, 0, 0, .12);
    }
    .analysis-page .workbench-grid[data-active-pane="manuscript"] .workbench-side,
    .analysis-page .workbench-grid[data-active-pane="review"] .workbench-main { display: none; }
    .analysis-page .workbench-side > .panel { min-height: 0; }
}

@media (max-width: 480px) {
    .analysis-page .workbench-grid { gap: var(--sp-4); }
    .analysis-page .analysis-pane-switch { position: sticky; top: 8px; z-index: 20; }
    .analysis-page .analysis-pane-switch button { font-size: 14px; }
    .analysis-page .result-summary-meta { align-items: flex-start; }
    .analysis-page .formula-block,
    .analysis-page mjx-container[display="true"] { max-width: 100%; }
}