/* css/style.css - QuantLab shared styles */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=IBM+Plex+Mono:wght@400;500&family=Outfit:wght@300;400;500;600&display=swap');

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

:root {
  --bg: #faf8f5;
  --bg-card: #ffffff;
  --ink: #1a1a1a;
  --ink2: #4a4540;
  --ink3: #6b6560;
  --mute: #a09b93;
  --border: #e8e5e0;
  --border2: #d4d1cc;
  --green: #2d8a5e;
  --green-bg: #f0f7f3;
  --green-border: #c8e0d4;
  --red: #c44;
  --code-bg: #f5f3f0;
  --code-header: #f0ede9;
  --pro-bg: #fdf6ec;
  --pro-border: #e8d5b0;
  --pro-text: #9a7b4f;
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Outfit', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

::selection { background: rgba(26,26,26,0.1); }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.anim { animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both; }
.a1 { animation-delay: 0.05s; }
.a2 { animation-delay: 0.15s; }
.a3 { animation-delay: 0.25s; }
.a4 { animation-delay: 0.35s; }

/* ── LAYOUT ── */
.wrap { max-width: 960px; margin: 0 auto; padding-left: 32px; padding-right: 32px; }
.page-body { padding: 48px 0 80px; }

/* ── NAV ── */
nav {
  border-bottom: 1px solid var(--border);
  background: rgba(250,248,245,0.92);
  backdrop-filter: blur(14px);
  position: sticky; top: 0; z-index: 100;
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 32px; max-width: 960px; margin: 0 auto;
}
.logo {
  font-family: var(--font-display);
  font-size: 23px; font-weight: 700; color: var(--ink);
  letter-spacing: -0.025em; text-decoration: none;
}
.logo em { font-style: normal; font-size: 28px; }
.nav-right { display: flex; align-items: center; gap: 24px; }
.nav-right a {
  font-size: 12px; font-weight: 600; color: var(--ink3);
  letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; transition: color 0.25s;
}
.nav-right a:hover { color: var(--ink); }
.nav-right a.active { color: var(--ink); }
.btn-signin, .btn-action {
  padding: 9px 20px;
  font-family: var(--font-body); font-size: 12px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink); background: transparent;
  border: 1.5px solid var(--ink);
  border-radius: 2px; cursor: pointer;
  transition: all 0.25s; text-decoration: none;
}
.btn-signin:hover, .btn-action:hover {
  background: var(--ink); color: #faf8f5;
}
.btn-primary {
  padding: 12px 24px;
  font-family: var(--font-body); font-size: 13px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: #faf8f5; background: var(--ink);
  border: none; border-radius: 2px; cursor: pointer;
  transition: all 0.3s;
}
.btn-primary:hover {
  background: #333; transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}

/* ── PAGE HEADER ── */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 32px; flex-wrap: wrap; gap: 16px;
}
.page-title {
  font-family: var(--font-display);
  font-size: 36px; font-weight: 700; color: var(--ink);
  letter-spacing: -0.02em;
}

/* ── TAGS FILTER ── */
.filter-row {
  display: flex; gap: 8px; margin-bottom: 28px; flex-wrap: wrap;
}
.filter-tag {
  padding: 6px 14px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--ink3); background: transparent;
  border: 1px solid var(--border2); border-radius: 2px;
  cursor: pointer; transition: all 0.2s;
}
.filter-tag:hover { border-color: var(--ink); color: var(--ink); }
.filter-tag.active {
  background: var(--ink); color: #faf8f5; border-color: var(--ink);
}

/* ── MODEL CARDS GRID ── */
.models-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.model-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 28px;
  cursor: pointer;
  transition: box-shadow 0.3s, transform 0.3s;
  text-decoration: none; color: inherit;
  display: block;
  position: relative;
}
.model-card:hover {
  box-shadow: 0 6px 30px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}
.model-card .card-status {
  display: flex; align-items: center; gap: 6px; margin-bottom: 12px;
}
.dot-live {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); display: inline-block;
  animation: pulse 2s ease infinite;
}
.dot-research {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--mute); display: inline-block;
}
.card-status-text {
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
}
.card-status-text.live { color: var(--green); }
.card-status-text.research { color: var(--mute); }

.model-card .card-title {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 700; color: var(--ink);
  margin-bottom: 4px; line-height: 1.2;
}
.model-card .card-paper {
  font-size: 13px; font-style: italic; color: var(--mute);
  margin-bottom: 14px;
}
.model-card .card-metric {
  display: flex; gap: 20px; margin-bottom: 14px;
  padding-top: 14px; border-top: 1px solid var(--border);
}
.card-metric .cm-label {
  font-family: var(--font-mono); font-size: 9px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--mute);
  margin-bottom: 2px;
}
.card-metric .cm-value {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 600; color: var(--ink);
}
.card-metric .cm-value.neg { color: var(--red); }

.tag-row { display: flex; gap: 5px; flex-wrap: wrap; }
.tag {
  padding: 3px 9px;
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  letter-spacing: 0.04em; color: var(--ink3);
  border: 1px solid var(--border2); text-transform: uppercase;
}

/* PRO badge */
.badge-pro {
  position: absolute; top: 16px; right: 16px;
  padding: 4px 10px;
  font-family: var(--font-mono); font-size: 9px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--pro-text); background: var(--pro-bg);
  border: 1px solid var(--pro-border);
}

/* ── MODEL DETAIL ── */
.model-header {
  margin-bottom: 32px;
}
.model-header .mh-status {
  display: flex; align-items: center; gap: 8px; margin-bottom: 10px;
}
.model-header .mh-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700; color: var(--ink);
  letter-spacing: -0.02em; margin-bottom: 6px;
}
.model-header .mh-paper {
  font-size: 15px; font-style: italic; color: var(--mute);
  margin-bottom: 16px;
}

.metrics-bar {
  display: flex; gap: 36px; padding: 20px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px; flex-wrap: wrap;
}
.metrics-bar .mb-label {
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--mute);
  margin-bottom: 4px;
}
.metrics-bar .mb-value {
  font-family: var(--font-display);
  font-size: 26px; font-weight: 600; color: var(--ink);
}
.metrics-bar .mb-value.neg { color: var(--red); }

/* ── TABS ── */
.tabs {
  display: flex; gap: 0; border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.tab {
  padding: 12px 24px;
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--mute); background: none; border: none;
  cursor: pointer; transition: color 0.2s;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab:hover { color: var(--ink3); }
.tab.active {
  color: var(--ink);
  border-bottom-color: var(--ink);
}
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.3s ease; }

/* Overview tab */
.overview-text {
  font-size: 15px; line-height: 1.8; color: var(--ink2);
  max-width: 640px;
}

/* Code tab */
.code-block {
  background: var(--code-bg); border: 1px solid var(--border);
  overflow: hidden;
}
.code-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 16px; border-bottom: 1px solid var(--border);
  background: var(--code-header);
}
.code-file {
  font-family: var(--font-mono); font-size: 12px; font-weight: 500; color: var(--ink2);
}
.code-lang {
  font-family: var(--font-mono); font-size: 10px; color: var(--mute);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.code-block pre {
  font-family: var(--font-mono); font-size: 13px; line-height: 1.75;
  color: var(--ink2); padding: 20px; margin: 0;
  overflow-x: auto; white-space: pre;
}
.btn-copy {
  padding: 6px 14px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  color: var(--ink3); background: var(--bg);
  border: 1px solid var(--border2); border-radius: 2px;
  cursor: pointer; transition: all 0.2s;
}
.btn-copy:hover { background: var(--ink); color: #faf8f5; }

/* Backtest tab */
.backtest-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 20px; margin-top: 20px;
}
.bt-card {
  padding: 24px; background: var(--bg-card);
  border: 1px solid var(--border);
}
.bt-card .bt-label {
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--mute);
  margin-bottom: 6px;
}
.bt-card .bt-value {
  font-family: var(--font-display);
  font-size: 32px; font-weight: 600; color: var(--ink);
}
.bt-card .bt-value.neg { color: var(--red); }

/* ── FORMS ── */
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink3);
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%; padding: 12px 16px;
  font-family: var(--font-body); font-size: 14px;
  color: var(--ink); background: var(--bg-card);
  border: 1.5px solid var(--border2); border-radius: 2px;
  outline: none; transition: border-color 0.25s;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--ink);
}
.form-group textarea {
  font-family: var(--font-mono); font-size: 13px;
  min-height: 200px; resize: vertical; line-height: 1.6;
}
.form-row-2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.form-row-4 {
  display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 16px;
}

/* ── REQUEST MODAL ── */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(26,26,26,0.4);
  backdrop-filter: blur(4px);
  z-index: 200;
  align-items: center; justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 40px;
  width: 90%; max-width: 480px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.12);
}
.modal h2 {
  font-family: var(--font-display);
  font-size: 24px; font-weight: 600; color: var(--ink);
  margin-bottom: 8px;
}
.modal p {
  font-size: 14px; color: var(--ink3); line-height: 1.6;
  margin-bottom: 24px;
}
.modal-actions {
  display: flex; gap: 12px; justify-content: flex-end;
}
.btn-ghost {
  padding: 10px 20px;
  font-family: var(--font-body); font-size: 13px; font-weight: 500;
  color: var(--ink3); background: none; border: none;
  cursor: pointer; transition: color 0.2s;
}
.btn-ghost:hover { color: var(--ink); }

/* ── EMPTY STATE ── */
.empty-state {
  text-align: center; padding: 60px 20px;
  color: var(--mute);
}
.empty-state .es-icon {
  font-size: 36px; margin-bottom: 16px; opacity: 0.4;
}
.empty-state h3 {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 600; color: var(--ink3);
  margin-bottom: 8px;
}
.empty-state p { font-size: 14px; }

/* ── TOAST ── */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  padding: 14px 24px;
  background: var(--ink); color: #faf8f5;
  font-size: 13px; font-weight: 500;
  border-radius: 2px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
  z-index: 300;
  animation: fadeUp 0.4s ease;
  display: none;
}
.toast.show { display: block; }
.toast.success { background: var(--green); }
.toast.error { background: var(--red); }

/* ── FOOTER ── */
footer {
  display: flex; justify-content: center; align-items: center;
  gap: 8px; padding: 28px 32px; border-top: 1px solid var(--border);
}
footer span { font-family: var(--font-mono); font-size: 11px; color: var(--mute); }
footer a { font-family: var(--font-mono); font-size: 11px; color: var(--ink3); text-decoration: none; }

/* ── LOADING ── */
.loading {
  display: flex; align-items: center; justify-content: center;
  padding: 60px; color: var(--mute);
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.06em; text-transform: uppercase;
}

/* ── RESPONSIVE ── */
@media (max-width: 680px) {
  .wrap { padding-left: 20px; padding-right: 20px; }
  .nav-inner { padding: 14px 20px; }
  .nav-right { gap: 14px; }
  .models-grid { grid-template-columns: 1fr; }
  .form-row-2, .form-row-4 { grid-template-columns: 1fr; }
  .backtest-grid { grid-template-columns: 1fr; }
  .metrics-bar { gap: 20px; }
  .modal { padding: 24px; }
}