/* ========================================
   TraceOS — Geoscience Visual Identity
   ======================================== */

:root {
  --bg: #0F0F1A;
  --bg-secondary: #14142A;
  --bg-card: #1A1A30;
  --fg: #F0EBE3;
  --fg-muted: #9A9080;
  --accent: #D4A843;
  --accent-light: #E8C06A;
  --accent-dim: #8B6914;
  --border: rgba(212, 168, 67, 0.15);
  --border-strong: rgba(212, 168, 67, 0.3);
  --text-secondary: #B0A898;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.nav-meta {
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  padding: 80px 48px 80px;
  max-width: 1200px;
  margin: 0 auto;
  align-items: center;
  min-height: 600px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.hero-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--border-strong);
  padding: 6px 14px;
  border-radius: 2px;
  width: fit-content;
}

.hero-headline {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(36px, 4vw, 54px);
  font-weight: 600;
  line-height: 1.15;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 12px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-number {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 26px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.03em;
  line-height: 1.4;
  max-width: 120px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-strong);
}

/* Hero Visual */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.seismic-wave {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #0A0A14;
}

.visual-caption {
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-align: center;
}

/* Philosophy */
.philosophy {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 48px;
}

.philosophy-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
}

.philosophy-label,
.section-label,
.diff-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 6px;
}

.philosophy-headline,
.section-headline,
.diff-headline {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--fg);
}

.philosophy-body {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.philosophy-body p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Features */
.features {
  padding: 80px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 56px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color 0.2s ease;
}

.feature-card:hover {
  border-color: var(--border-strong);
}

.feature-icon {
  width: 40px;
  height: 40px;
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--fg);
  line-height: 1.2;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.feature-specs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.spec {
  font-size: 12px;
  color: var(--accent-dim);
  letter-spacing: 0.03em;
  padding-left: 12px;
  position: relative;
}

.spec::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
}

/* Modules / Workflow */
.modules {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 48px;
}

.modules-header {
  max-width: 1200px;
  margin: 0 auto 56px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.workflow-steps {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.step-num {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 48px;
  font-weight: 300;
  color: var(--accent);
  opacity: 0.5;
  line-height: 1;
}

.step-title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--fg);
}

.step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.step-connector {
  width: 48px;
  height: 1px;
  background: var(--border-strong);
  margin-top: 60px;
  flex-shrink: 0;
}

.modules-note {
  max-width: 1200px;
  margin: 32px auto 0;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.modules-note p {
  font-size: 13px;
  color: var(--fg-muted);
}

/* Difference */
.difference {
  padding: 80px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.difference-inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.diff-item {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.diff-metric {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--accent-light);
}

.diff-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Closing */
.closing {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 80px 48px;
  text-align: center;
}

.closing-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.closing-bg-art {
  width: 100%;
  opacity: 0.6;
  margin-bottom: 16px;
}

.closing-bg-art svg {
  width: 100%;
  height: 80px;
}

.closing-headline {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 600;
  color: var(--fg);
  line-height: 1.2;
}

.closing-body {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.closing-vision {
  margin-top: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  width: 100%;
}

.closing-vision p {
  font-size: 15px;
  color: var(--fg-muted);
  font-style: italic;
  font-family: 'Crimson Pro', Georgia, serif;
  line-height: 1.7;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 48px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
}

.footer-meta {
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--fg-muted);
}

.footer-links .separator {
  color: var(--border-strong);
}

/* Navigation additions */
.nav-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-brand {
  text-decoration: none;
}

.nav-link {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--accent-light);
}

/* ── Portal Layout ───────────────────────────────── */
.portal-layout {
  min-height: 100vh;
  background: var(--bg);
}

.portal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  border-bottom: 1px solid var(--border);
}

.portal-title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.03em;
}

.portal-body {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px;
}

.portal-section {
  margin-bottom: 48px;
}

.portal-section-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--accent);
  color: #0F0F1A;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.2s;
}

.btn:hover { background: var(--accent-light); }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--fg);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 8px 16px; font-size: 12px; }

/* ── Project Cards ───────────────────────────────── */
.project-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 24px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s;
}

.project-card:hover { border-color: var(--border-strong); }

.project-card-main { flex: 1; }

.project-card-name {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 4px;
}

.project-card-meta {
  font-size: 12px;
  color: var(--fg-muted);
  margin-bottom: 8px;
}

.project-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.project-card-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  flex-shrink: 0;
}

.status-badge {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 2px;
}

.status-uploaded   { background: rgba(212,168,67,0.15); color: var(--accent); border: 1px solid rgba(212,168,67,0.3); }
.status-processing { background: rgba(100,149,237,0.15); color: #6495ED; border: 1px solid rgba(100,149,237,0.3); }
.status-complete   { background: rgba(60,179,113,0.15); color: #3CB371; border: 1px solid rgba(60,179,113,0.3); }
.status-error      { background: rgba(220,80,80,0.15); color: #DC5050; border: 1px solid rgba(220,80,80,0.3); }

/* ── Upload Form ──────────────────────────────────── */
.upload-wrap {
  max-width: 560px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 12px 16px;
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}

.form-input:focus { border-color: var(--accent); }

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.file-drop {
  border: 2px dashed var(--border);
  border-radius: 4px;
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s;
}

.file-drop:hover, .file-drop.drag-over { border-color: var(--accent); }

.file-drop p { font-size: 14px; color: var(--text-secondary); margin-top: 12px; }

.file-drop input[type=file] { display: none; }

.file-drop-icon { font-size: 32px; color: var(--accent-dim); }

.upload-filename {
  font-size: 13px;
  color: var(--accent-light);
  margin-top: 8px;
}

.form-error {
  background: rgba(220,80,80,0.1);
  border: 1px solid rgba(220,80,80,0.3);
  color: #DC5050;
  padding: 12px 16px;
  border-radius: 2px;
  font-size: 14px;
  margin-bottom: 24px;
}

/* ── Activity Timeline ────────────────────────────── */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.timeline-item:last-child { border-bottom: none; }

.timeline-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 6px;
  flex-shrink: 0;
}

.timeline-content { flex: 1; }

.timeline-type {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 4px;
}

.timeline-desc {
  font-size: 14px;
  color: var(--fg);
}

.timeline-date {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 4px;
}

/* ── Project Detail ──────────────────────────────── */
.project-detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 40px;
  gap: 24px;
}

.project-detail-name {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 36px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 8px;
}

.project-detail-meta {
  font-size: 13px;
  color: var(--fg-muted);
}

.project-detail-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 32px;
  align-items: start;
}

.project-main-content {}

.project-sidebar {}

.back-link {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 32px;
  transition: color 0.2s;
}

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

/* ── Auth Pages ──────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 48px;
  width: 100%;
  max-width: 420px;
}

.auth-title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 32px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 8px;
}

.auth-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.auth-form { display: flex; flex-direction: column; gap: 16px; }

.auth-success {
  background: rgba(60,179,113,0.1);
  border: 1px solid rgba(60,179,113,0.3);
  color: #3CB371;
  padding: 12px 16px;
  border-radius: 2px;
  font-size: 14px;
  margin-bottom: 24px;
}

/* Responsive */
@media (max-width: 900px) {
  .navbar {
    padding: 20px 24px;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 48px 24px;
    gap: 40px;
  }

  .hero-visual {
    order: -1;
  }

  .philosophy-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .workflow-steps {
    flex-direction: column;
  }

  .step-connector {
    width: 1px;
    height: 24px;
    margin: 0 auto;
  }

  .diff-grid {
    grid-template-columns: 1fr;
  }

  .modules, .features, .difference, .closing, .philosophy {
    padding: 48px 24px;
  }

  .footer {
    padding: 24px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 500px) {
  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .stat-divider {
    display: none;
  }
}