/* ============================================
   Brain2Speech project page — academic, minimal
   ============================================ */

:root {
  --bg: #f8f9fa;
  --bg-content: #fff;
  --text: #1a1a1a;
  --text-muted: #555;
  --accent: #2d3748;
  --accent-bg: #2d3748;
  --border: #e2e8f0;
  --link: #2563eb;
  --link-visited: #5b21b6;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Consolas", "Liberation Mono", "Menlo", monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* Layout: identity block + main content */
.layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

@media (min-width: 768px) {
  .layout {
    flex-direction: row;
  }
}

/* Identity block (left sidebar on desktop, top on mobile) */
.identity-block {
  background: var(--accent-bg);
  color: #fff;
  padding: 1.5rem 1.25rem;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .identity-block {
    width: 28%;
    max-width: 320px;
    min-height: 100vh;
    padding: 2rem 1.5rem;
  }
}

.identity-title {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
}

@media (min-width: 768px) {
  .identity-title {
    font-size: 1.25rem;
  }
}

.identity-meta {
  margin: 0;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.85);
}

.identity-meta a {
  color: #93c5fd;
  text-decoration: underline;
}

.identity-meta a:hover {
  color: #bfdbfe;
}

/* Main content */
.content {
  flex: 1;
  padding: 1.5rem 1.25rem 2rem;
  background: var(--bg-content);
}

@media (min-width: 768px) {
  .content {
    padding: 2rem 3rem 3rem;
  }
}

/* Section headings — semi-technical / monospace feel */
.section-heading {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent);
  margin: 0 0 1rem;
  text-transform: uppercase;
}

.section {
  margin-bottom: 2.5rem;
}

/* Hero */
.hero {
  margin-bottom: 2rem;
}

.hero-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  line-height: 1.3;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 1.75rem;
  }
}

.hero-authors,
.hero-affiliation,
.hero-status {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.hero-actions {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-family: var(--font-sans);
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--accent-bg);
  color: #fff;
}

.btn-primary:hover {
  background: #1a202c;
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--bg);
  border-color: var(--accent);
}

.btn-copy {
  margin-top: 0.5rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-copy:hover {
  background: var(--border);
}

/* Abstract */
.abstract-text {
  margin: 0;
  max-width: 72ch;
  text-align: justify;
}

/* Figure */
.figure-wrap {
  margin: 0;
}

.figure-container {
  max-width: 900px;
  margin: 0 auto 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.figure-img {
  width: 100%;
  height: auto;
  display: block;
  vertical-align: middle;
}

.figure-caption {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

/* Audio section */
.audio-section .audio-intro {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.audio-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 -0.5rem;
  width: 100%;
  max-width: 100%;
}

/* Semantic table: 1 header row + 10 data rows; 5 columns (row label + 4 models) */
.audio-table {
  table-layout: fixed;
  width: 100%;
  min-width: 1100px;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-content);
}

/* Column widths: narrow label, transcript column, then equal-width audio columns */
.audio-table .col-label {
  width: 4%;
}

.audio-table .col-transcript {
  width: 20%;
}

.audio-table .col-audio {
  width: 19%;
}

.audio-table th,
.audio-table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  vertical-align: middle;
  overflow: hidden;
}

/* Header row: each model name directly above its column */
.audio-table thead th {
  background: var(--accent-bg);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  text-align: center;
  white-space: nowrap;
  border-color: rgba(255, 255, 255, 0.2);
}

.audio-th-corner {
  width: 3.5rem;
}

/* Row labels (1..10) in first column */
.audio-table tbody th {
  background: var(--accent-bg);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  text-align: center;
  border-color: rgba(255, 255, 255, 0.2);
}

/* Transcript column: readable text, wrap as needed */
.audio-td-transcript {
  font-size: 0.9rem;
  line-height: 1.4;
  max-width: 16em;
}

/* Audio player card style */
.audio-player-wrap {
  min-width: 0;
  width: 100%;
}

.audio-player-wrap audio {
  width: 100%;
  height: 36px;
}

.audio-placeholder {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.5rem;
  background: var(--bg);
  border-radius: var(--radius);
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Citation */
.bibtex {
  margin: 0;
  padding: 1rem 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
}

.bibtex code {
  font-family: inherit;
}

/* Footer */
.footer {
  padding: 1rem 1.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg);
  border-top: 1px solid var(--border);
}

@media (min-width: 768px) {
  .footer {
    padding: 1rem 2rem;
    margin-left: 28%;
    max-width: calc(100% - 28%);
  }
}

.footer p {
  margin: 0;
}