:root {
    --primary: #0007cd;
    --primary-active: #0005a3;
    --primary-glow: #1a26ff;
    --ink: #ffffff;
    --body: #a8a8a8;
    --body-strong: #ffffff;
    --muted: #888888;
    --muted-soft: #666666;
    --hairline: #222222;
    --hairline-soft: #1a1a1a;
    --hairline-strong: #333333;
    --canvas: #0f0f0f;
    --canvas-deep: #000000;
    --surface-card: #181818;
    --surface-elevated: #222222;
    --surface-strong: #2a2a2a;
    --on-primary: #ffffff;
    --accent-cyan: #00d4ff;
    --accent-violet: #7b3aed;
    --semantic-error: #ff4d4d;
    --semantic-success: #33d17a;
    --font-sans: Inter, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", ui-sans-serif, system-ui, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-pill: 9999px;
    --content: min(1200px, calc(100% - 48px));
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    color: var(--body);
    background: var(--canvas);
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
}

button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; }

.page-shell {
    width: var(--content);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    height: 64px;
    border-bottom: 1px solid var(--hairline);
    background: color-mix(in srgb, var(--canvas) 86%, transparent);
    backdrop-filter: blur(16px);
}

.site-header__inner {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.site-mark {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-decoration: none;
}

.site-mark__dot {
    width: 8px;
    height: 8px;
    border-radius: 2px;
    background: var(--primary);
    box-shadow: 0 0 18px color-mix(in srgb, var(--primary-glow) 70%, transparent);
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.site-header__link {
    display: inline-flex;
    align-items: center;
    height: 40px;
    padding: 0 14px;
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--ink);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
}

.intro {
    padding: 28px 0 8px;
}

.intro__meta {
    margin: 0 0 20px;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.04em;
}

.notes--top {
    border-top: 0;
    border-bottom: 1px solid var(--hairline);
    padding: 0 0 28px;
}

.hero {
    display: none;
}

.hero__glow {
    pointer-events: none;
    position: absolute;
    right: 4%;
    top: 10%;
    width: min(560px, 70%);
    height: 420px;
    background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--primary-glow) 34%, transparent), transparent 68%);
    filter: blur(8px);
}

.eyebrow {
    margin: 0 0 16px;
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
}

.eyebrow span { color: var(--accent-cyan); font-family: var(--font-mono); }

h1, h2, h3, p { margin-top: 0; }

h1 {
    margin: 0 0 18px;
    color: var(--ink);
    font-size: clamp(36px, 6vw, 72px);
    font-weight: 500;
    letter-spacing: -0.03em;
    line-height: 1.05;
}

.hero__summary {
    max-width: 560px;
    margin: 0 0 28px;
    color: var(--body);
    font-size: 16px;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    height: 40px;
    padding: 0 18px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
}

.btn-primary {
    border: 0;
    background: var(--primary);
    color: var(--on-primary);
}

.btn-secondary {
    border: 1px solid var(--hairline-strong);
    background: var(--surface-elevated);
    color: var(--ink);
}

.terminal-mockup {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 32px;
    border-radius: var(--radius-xl);
    background: var(--canvas-deep);
}

.terminal-pane {
    display: grid;
    gap: 6px;
    min-height: 124px;
    padding: 20px;
    border-radius: var(--radius-lg);
    background: var(--surface-card);
}

.terminal-pane__k {
    color: var(--muted-soft);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.terminal-pane strong {
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 500;
    letter-spacing: -0.04em;
    line-height: 1.1;
}

.terminal-pane__label {
    color: var(--body);
    font-size: 13px;
}

.directory { padding: 0 0 96px; }

.directory__toolbar {
    position: static;
    padding: 20px 0 22px;
    border-bottom: 1px solid var(--hairline);
    background: transparent;
}

.toolbar__topline,
.filters,
.filter-tabs,
.source-key {
    display: flex;
    align-items: center;
}

.toolbar__topline {
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 16px;
}

.result-summary {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
}

.result-summary strong {
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 500;
}

.source-key {
    flex-wrap: wrap;
    gap: 12px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.source-key span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.source-key__mark {
    width: 7px;
    height: 7px;
    border-radius: 2px;
}

.source-key__mark--q1 { background: var(--semantic-success); }
.source-key__mark--q2 { background: var(--accent-cyan); }
.source-key__mark--q3 { background: #d4a017; }
.source-key__mark--q4 { background: var(--muted-soft); }
.source-key__mark--cssci { background: var(--accent-violet); }

.filters {
    flex-wrap: wrap;
    gap: 10px;
}

.search-wrap {
    position: relative;
    flex: 1 1 100%;
}

.search-icon {
    position: absolute;
    top: 10px;
    left: 14px;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 13px;
}

.search-wrap input,
select {
    min-height: 40px;
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    background: var(--surface-card);
    color: var(--ink);
}

.search-wrap input {
    width: 100%;
    padding: 0 14px 0 38px;
    outline: none;
}

.search-wrap input:focus,
select:focus {
    border-color: var(--primary);
}

select {
    flex: 1 1 148px;
    min-width: 0;
    max-width: 100%;
    padding: 0 32px 0 12px;
}

.verified-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 40px;
    padding: 0 10px;
    color: var(--muted);
    font-size: 13px;
}

.verified-toggle input { accent-color: var(--primary); }

.filter-tabs {
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.filter-tab {
    height: 32px;
    padding: 0 12px;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--muted);
    font-size: 13px;
    font-weight: 500;
}

.filter-tab:hover,
.filter-tab[aria-pressed="true"] {
    border-color: var(--hairline-strong);
    background: var(--surface-elevated);
    color: var(--ink);
}

.directory__body { min-height: 300px; }

.directory-status {
    margin: 48px 0;
    color: var(--muted);
    text-align: center;
}

.directory-status--error { color: var(--semantic-error); }

.group { padding-top: 48px; }

.group__heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 16px;
}

.group__heading h2 {
    margin: 0;
    color: var(--ink);
    font-size: 24px;
    font-weight: 500;
    letter-spacing: -0.02em;
}

.group__heading span {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 12px;
}

.advisor-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.advisor-card {
    overflow: hidden;
    border: 1px solid var(--hairline);
    border-radius: var(--radius-xl);
    background: var(--surface-card);
}

.advisor-card__main,
.advisor-card__papers { padding: 28px; }

.advisor-card__topline {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.advisor-card h3 {
    margin: 0 0 6px;
    color: var(--ink);
    font-size: 24px;
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.profile-link {
    color: var(--ink);
    text-decoration: none;
}

.profile-link:hover {
    color: var(--accent-cyan);
}

.profile-link span {
    color: var(--muted);
    font-size: 14px;
}

.advisor-card__link {
    margin: -8px 0 16px;
    font-family: var(--font-mono);
    font-size: 12px;
}

.advisor-card__link a {
    color: var(--accent-cyan);
    text-decoration: none;
}

.advisor-card__link a:hover {
    text-decoration: underline;
}

.advisor-card__unit {
    margin: 0 0 16px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.45;
}

.evidence-badge,
.rank-badge {
    flex: none;
    display: inline-flex;
    align-items: center;
    border-radius: var(--radius-pill);
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.evidence-badge { background: var(--surface-elevated); color: var(--ink); }
.evidence-badge--doi { color: var(--semantic-success); }
.evidence-badge--official { color: var(--accent-cyan); }
.evidence-badge--gap { color: var(--muted); }

.advisor-card__focus {
    min-height: 48px;
    margin: 0 0 16px;
    color: var(--body);
    font-size: 14px;
}

.tag-list { display: flex; flex-wrap: wrap; gap: 6px; }

.tag {
    border-radius: var(--radius-xs);
    background: var(--surface-elevated);
    color: var(--body);
    padding: 4px 8px;
    font-size: 11px;
}

.advisor-card__papers {
    border-top: 1px solid var(--hairline);
    background: var(--canvas-deep);
}

.paper-list {
    display: grid;
    gap: 14px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.paper-list li { display: grid; gap: 4px; }
.paper-list li:nth-child(n + 3) { display: none; }
.advisor-card.is-expanded .paper-list li:nth-child(n + 3) { display: grid; }

.paper-link,
.paper-title {
    font-size: 13px;
    line-height: 1.45;
}

.paper-link { color: var(--ink); text-decoration: none; }
.paper-link:hover { color: var(--accent-cyan); }

.paper-title { color: var(--body); }

.paper-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 11px;
}

.rank-badge--q1 { background: color-mix(in srgb, var(--semantic-success) 16%, transparent); color: var(--semantic-success); }
.rank-badge--q2 { background: color-mix(in srgb, var(--accent-cyan) 16%, transparent); color: var(--accent-cyan); }
.rank-badge--q3 { background: color-mix(in srgb, #d4a017 16%, transparent); color: #e0b84a; }
.rank-badge--q4 { background: var(--surface-elevated); color: var(--muted); }
.rank-badge--cssci,
.rank-badge--ccf { background: color-mix(in srgb, var(--accent-violet) 18%, transparent); color: #c4a6ff; }

.empty-papers {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
}

.advisor-card__toggle {
    width: 100%;
    border: 0;
    border-top: 1px solid var(--hairline);
    background: transparent;
    color: var(--muted);
    padding: 12px 28px 16px;
    font-size: 13px;
    font-weight: 500;
    text-align: left;
}

.advisor-card__toggle:hover { color: var(--ink); }

.no-results {
    padding: 80px 0;
    color: var(--muted);
    text-align: center;
}

.no-results span {
    display: block;
    margin-bottom: 10px;
    color: var(--primary-glow);
    font-family: var(--font-mono);
    font-size: 28px;
}

.no-results p { margin: 0; }

.notes {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 40px;
}

.notes h2 {
    margin: 0 0 10px;
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
}

.notes p {
    max-width: 560px;
    margin: 0;
    color: var(--body);
    font-size: 14px;
}

.notes a { color: var(--ink); }

.sources-dialog {
    width: min(560px, calc(100% - 32px));
    max-height: min(80vh, 640px);
    margin: auto;
    padding: 0;
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-xl);
    background: var(--surface-card);
    color: var(--body);
}

.sources-dialog::backdrop {
    background: color-mix(in srgb, var(--canvas-deep) 72%, transparent);
}

.sources-dialog__panel { padding: 24px; }

.sources-dialog__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
}

.sources-dialog__head h2 {
    margin: 0;
    color: var(--ink);
    font-size: 18px;
    font-weight: 600;
}

.sources-dialog__close {
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-md);
    background: var(--surface-elevated);
    color: var(--ink);
    font-size: 13px;
    font-weight: 500;
}

.sources-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}

.sources-list li {
    color: var(--body);
    font-size: 14px;
    line-height: 1.45;
}

.sources-list a {
    color: var(--ink);
    text-decoration: none;
}

.sources-list a:hover { color: var(--accent-cyan); }

@media (max-width: 640px) {
    :root { --content: min(100% - 32px, 620px); }
    .advisor-grid, .notes { grid-template-columns: 1fr; }
    .toolbar__topline { flex-direction: column; align-items: flex-start; }
    select { flex: 1 1 calc(50% - 10px); }
    .site-header__link { height: 36px; padding: 0 10px; font-size: 13px; }
}