*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0c0f;
  --surface: #111318;
  --surface2: #181c22;
  --border: rgba(255,255,255,0.07);
  --border2: rgba(255,255,255,0.13);
  --amber: #e8a940;
  --amber-dim: rgba(232,169,64,0.12);
  --amber-glow: rgba(232,169,64,0.06);
  --text: #e8e4da;
  --muted: #7a7870;
  --muted2: #4a4840;
  --rocky-green: #4ecb8d;
  --rocky-green-dim: rgba(78,203,141,0.1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Syne', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Stars background ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.35) 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 40%, rgba(255,255,255,0.2) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 55% 8%, rgba(255,255,255,0.28) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 55%, rgba(255,255,255,0.18) 0%, transparent 100%),
    radial-gradient(1px 1px at 85% 25%, rgba(255,255,255,0.22) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 42% 72%, rgba(255,255,255,0.15) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 80%, rgba(255,255,255,0.25) 0%, transparent 100%),
    radial-gradient(1px 1px at 18% 88%, rgba(255,255,255,0.18) 0%, transparent 100%),
    radial-gradient(1px 1px at 62% 90%, rgba(255,255,255,0.12) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 5% 50%, rgba(255,255,255,0.2) 0%, transparent 100%),
    radial-gradient(1px 1px at 78% 95%, rgba(255,255,255,0.14) 0%, transparent 100%),
    radial-gradient(1px 1px at 95% 12%, rgba(255,255,255,0.3) 0%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

/* ── Layout ── */
.wrapper {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── Header ── */
header {
  padding: 60px 0 48px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (max-width: 600px) {
  header { padding: 24px 0 20px; gap: 6px; }
  .subtitle { font-size: 13px; margin-top: 2px; }
  .tau-line { margin: 8px 0 0; }
}

.eyebrow {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--amber);
  text-transform: uppercase;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.1s;
}

h1 {
  font-size: clamp(38px, 7vw, 64px);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.02em;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.2s;
}

h1 span { color: var(--amber); }

.subtitle {
  font-size: 15px;
  color: var(--muted);
  font-weight: 400;
  max-width: 480px;
  line-height: 1.6;
  margin-top: 4px;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.35s;
}

/* ── Main translator card ── */
.translator {
  background: var(--surface);
  border: 0.5px solid var(--border2);
  border-radius: 20px;
  overflow: hidden;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.45s;
}

.translator-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 220px;
}

@media (max-width: 600px) {
  .translator-inner { grid-template-columns: 1fr; }
}

.pane {
  padding: 24px;
  position: relative;
}

.pane-label {
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pane-label .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.pane-english .pane-label { color: var(--muted); }
.pane-english .dot { background: var(--muted2); }
.pane-rocky .pane-label { color: var(--rocky-green); }
.pane-rocky .dot { background: var(--rocky-green); box-shadow: 0 0 6px var(--rocky-green); }

.pane-english {
  border-right: 0.5px solid var(--border);
}

@media (max-width: 600px) {
  .pane-english { border-right: none; border-bottom: 0.5px solid var(--border); }
}

.pane-rocky {
  background: linear-gradient(135deg, var(--rocky-green-dim) 0%, transparent 60%);
}

textarea {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  font-family: 'Syne', sans-serif;
  font-size: 16px;
  font-weight: 400;
  color: var(--text);
  line-height: 1.65;
  min-height: 120px;
  caret-color: var(--amber);
}

textarea::placeholder { color: var(--muted2); }

.output-text {
  font-family: 'Space Mono', monospace;
  font-size: 14px;
  line-height: 1.85;
  color: var(--rocky-green);
  min-height: 120px;
  white-space: pre-wrap;
  word-break: break-word;
}

.output-placeholder {
  color: var(--muted2);
  font-family: 'Space Mono', monospace;
  font-size: 13px;
  font-style: italic;
}

/* ── Translator bar ── */
.translator-bar {
  border-top: 0.5px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.char-count {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--muted);
}

.btn-group { display: flex; gap: 8px; }

button {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.15s ease;
  border: none;
  outline: none;
  padding: 9px 18px;
}

.btn-primary {
  background: var(--amber);
  color: #0a0c0f;
  letter-spacing: 0.02em;
}

.btn-primary:hover { background: #f0b84a; transform: translateY(-1px); }
.btn-primary:active { transform: scale(0.97); }

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 0.5px solid var(--border2);
}

.btn-ghost:hover { color: var(--text); border-color: var(--muted2); }
.btn-ghost:active { transform: scale(0.97); }

.btn-copy {
  background: transparent;
  color: var(--rocky-green);
  border: 0.5px solid rgba(78,203,141,0.25);
  font-size: 12px;
  padding: 6px 12px;
}

.btn-copy:hover { background: var(--rocky-green-dim); }
.btn-copy.copied { color: var(--amber); border-color: rgba(232,169,64,0.3); }

/* ── Examples ── */
.section-title {
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
  margin-top: 40px;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.55s;
}

.examples {
  display: flex;
  flex-direction: column;
  gap: 8px;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.65s;
}

.example-btn {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: 10px;
  padding: 13px 16px;
  text-align: left;
  color: var(--muted);
  font-family: 'Syne', sans-serif;
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1.5;
}

.example-btn:hover {
  background: var(--surface2);
  border-color: var(--border2);
  color: var(--text);
  transform: translateX(4px);
}

/* ── Rules grid ── */
.rules {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-top: 14px;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.75s;
}

.rule-card {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  transition: border-color 0.15s;
}

.rule-card:hover { border-color: var(--border2); }

.rule-name {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--amber);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.rule-before {
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  color: var(--muted);
  text-decoration: line-through;
  margin-bottom: 2px;
}

.rule-after {
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  color: var(--rocky-green);
}

/* ── Footer ── */
footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 0.5px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--muted2);
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.85s;
}

.footer-sig { color: var(--muted); }
.footer-sig span { color: var(--amber); }

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.flash {
  animation: flashGreen 0.4s ease;
}

@keyframes flashGreen {
  0%   { background: var(--rocky-green-dim); }
  100% { background: linear-gradient(135deg, var(--rocky-green-dim) 0%, transparent 60%); }
}

/* ── Tau Ceti accent line ── */
.tau-line {
  width: 40px;
  height: 2px;
  background: var(--amber);
  margin: 16px 0 0;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.3s;
}

/* ── AI Mode Toggle ── */
.mode-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--muted);
}

.mode-toggle input[type="checkbox"] {
  display: none;
}

.toggle-track {
  width: 36px;
  height: 20px;
  background: var(--muted2);
  border-radius: 10px;
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text);
  transition: transform 0.2s;
}

.mode-toggle input:checked + .toggle-track {
  background: var(--amber);
}

.mode-toggle input:checked + .toggle-track::after {
  transform: translateX(16px);
}

.mode-badge {
  font-family: 'Space Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
}

.mode-badge.ai {
  background: var(--amber-dim);
  color: var(--amber);
}

.mode-badge.offline {
  background: var(--rocky-green-dim);
  color: var(--rocky-green);
}

.loading-dots::after {
  content: '';
  animation: dots 1.2s steps(4, end) infinite;
}

@keyframes dots {
  0%   { content: ''; }
  25%  { content: '.'; }
  50%  { content: '..'; }
  75%  { content: '...'; }
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ── Speaker inputs ── */
.speaker-bar {
  padding: 18px 24px;
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  border-bottom: 0.5px solid var(--border);
}

.speaker-field {
  display: flex;
  align-items: center;
  gap: 8px;
}

.speaker-field label {
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.speaker-field input {
  width: 120px;
  padding: 7px 10px;
  background: var(--surface2);
  border: 0.5px solid var(--border2);
  border-radius: 6px;
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}

.speaker-field input::placeholder {
  color: var(--muted2);
}

.speaker-field input:focus {
  border-color: var(--amber);
  box-shadow: 0 0 0 2px var(--amber-dim);
}

/* ── Speak button ── */
.btn-speak {
  background: transparent;
  color: var(--amber);
  border: 0.5px solid rgba(232,169,64,0.25);
  font-size: 12px;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.btn-speak:hover { background: var(--amber-dim); }
.btn-speak.playing { color: var(--rocky-green); border-color: rgba(78,203,141,0.25); }

/* ── Prompt selector ── */
.prompt-select {
  padding: 6px 10px;
  background: var(--surface2);
  border: 0.5px solid var(--border2);
  border-radius: 6px;
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--text);
  outline: none;
  cursor: pointer;
  transition: border-color 0.15s;
}

.prompt-select:focus {
  border-color: var(--amber);
  box-shadow: 0 0 0 2px var(--amber-dim);
}

.prompt-select option {
  background: var(--surface);
  color: var(--text);
}

/* ── Lab page ── */
.lab-wrapper {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.lab-header {
  padding: 48px 0 36px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lab-header h1 { font-size: clamp(28px, 5vw, 48px); }
.lab-header h1 span { color: var(--amber); }

.lab-back {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.08em;
  transition: color 0.15s;
}

.lab-back:hover { color: var(--amber); }

/* ── Lab input card ── */
.lab-input-card {
  background: var(--surface);
  border: 0.5px solid var(--border2);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
}

.lab-input-card textarea {
  min-height: 80px;
  margin-bottom: 16px;
}

.lab-input-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.lab-fields {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

/* ── Comparison grid ── */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 36px;
}

@media (max-width: 700px) {
  .compare-grid { grid-template-columns: 1fr; }
}

.compare-cell {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s;
  position: relative;
}

.compare-cell:hover { border-color: var(--border2); }

.compare-cell.winner {
  border-color: var(--amber);
  box-shadow: 0 0 12px var(--amber-dim);
}

.compare-cell-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.compare-version {
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  background: var(--amber-dim);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 700;
}

.compare-label {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.compare-output {
  font-family: 'Space Mono', monospace;
  font-size: 13px;
  line-height: 1.8;
  color: var(--rocky-green);
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 60px;
}

.compare-output.placeholder {
  color: var(--muted2);
  font-style: italic;
}

.compare-vote {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 8px;
  border-top: 0.5px solid var(--border);
}

.vote-btn {
  background: transparent;
  border: 0.5px solid var(--border2);
  color: var(--muted);
  padding: 5px 12px;
  font-size: 12px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  transition: all 0.15s;
}

.vote-btn:hover {
  border-color: var(--amber);
  color: var(--amber);
  background: var(--amber-dim);
}

.vote-btn.voted {
  border-color: var(--amber);
  color: var(--amber);
  background: var(--amber-dim);
}

.vote-count {
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  color: var(--muted);
}

/* ── Test suite section ── */
.test-suite {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.test-btn {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  text-align: left;
  color: var(--muted);
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1.4;
  flex: 1 1 calc(50% - 4px);
  min-width: 260px;
}

.test-btn:hover {
  background: var(--surface2);
  border-color: var(--border2);
  color: var(--text);
}

/* ── Lab loading skeleton ── */
.skeleton-line {
  height: 14px;
  background: linear-gradient(90deg, var(--surface2) 25%, var(--border) 50%, var(--surface2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
  margin-bottom: 8px;
}

.skeleton-line:last-child { width: 60%; }

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Lab link in main page ── */
.lab-link {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.06em;
  transition: color 0.15s;
  border: 0.5px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
}

.lab-link:hover { color: var(--amber); border-color: var(--amber); }