@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Mono:wght@400;500&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&display=swap');

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

:root {
  --bg:        #F5F3EE;
  --bg-card:   #FAFAF7;
  --bg-inset:  #ECEAE3;
  --border:    #D8D5CC;
  --text:      #1A1916;
  --text-2:    #6B6860;
  --text-3:    #A09D95;
  --accent:    #1D4ED8;
  --accent-lt: #DBEAFE;
  --accent-dk: #1E3A8A;
  --green:     #15803D;
  --green-lt:  #DCFCE7;
  --amber:     #B45309;
  --amber-lt:  #FEF3C7;
  --red:       #B91C1C;
  --red-lt:    #FEE2E2;
  --radius:    10px;
  --radius-lg: 16px;
  --nav-h:     60px;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;
  --shadow:    0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.05);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Nav ─────────────────────────────────────────── */
#site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 2rem;
  gap: 2rem;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  flex-wrap: wrap;
}

.nav-links a {
  display: block;
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 13.5px;
  font-weight: 400;
  color: var(--text-2);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.nav-links a:hover { background: var(--bg-inset); color: var(--text); }
.nav-links a.active { background: var(--accent-lt); color: var(--accent-dk); font-weight: 500; }

/* ── Page shell ──────────────────────────────────── */
.page-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text);
}

.page-header p {
  margin-top: 6px;
  color: var(--text-2);
  font-size: 14.5px;
  font-weight: 300;
}

/* ── Cards ───────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card + .card { margin-top: 1rem; }

.card-title {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  margin-bottom: 1rem;
}

/* ── Metric chips ────────────────────────────────── */
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 1.25rem;
}

.metric {
  background: var(--bg-inset);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
}

.metric-label {
  font-size: 11.5px;
  color: var(--text-3);
  margin-bottom: 2px;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.02em;
}

.metric-value.green { color: var(--green); }
.metric-value.blue  { color: var(--accent); }

/* ── Form controls ───────────────────────────────── */
.field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: 0.02em;
}

.field input, .field select {
  height: 38px;
  padding: 0 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
}

.field input:focus, .field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(29,78,216,0.1);
}

.field .hint {
  font-size: 11px;
  color: var(--text-3);
}

/* Slider row */
.slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 3px;
}

.slider-row input[type=range] {
  flex: 1;
  height: 4px;
  accent-color: var(--accent);
  cursor: pointer;
  padding: 0;
  border: none;
  box-shadow: none;
  background: transparent;
}

.slider-row .slider-val {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  min-width: 52px;
  text-align: right;
}

/* ── Toggle pill ─────────────────────────────────── */
.toggle-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.toggle-pill {
  padding: 5px 12px;
  border-radius: 99px;
  font-size: 12.5px;
  font-weight: 400;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.15s;
}

.toggle-pill:hover { border-color: var(--accent); color: var(--accent-dk); }
.toggle-pill.on { background: var(--accent-lt); border-color: var(--accent); color: var(--accent-dk); font-weight: 500; }

/* ── Chart legend ────────────────────────────────── */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 10px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-2);
}

.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* ── Divider ─────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
  margin: 1.25rem 0;
}

/* ── Schedule table ──────────────────────────────── */
.schedule-wrap {
  overflow-x: auto;
  max-height: 320px;
  overflow-y: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  font-family: var(--font-mono);
}

.schedule-table th {
  position: sticky;
  top: 0;
  background: var(--bg-inset);
  padding: 8px 12px;
  text-align: right;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
}

.schedule-table th:first-child { text-align: left; }

.schedule-table td {
  padding: 7px 12px;
  text-align: right;
  border-bottom: 1px solid var(--bg-inset);
  color: var(--text);
}

.schedule-table td:first-child { text-align: left; color: var(--text-2); }
.schedule-table tr:last-child td { border-bottom: none; }
.schedule-table tr:hover td { background: var(--bg-inset); }

/* ── Homepage cards ──────────────────────────────── */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.tool-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: box-shadow 0.15s, border-color 0.15s, transform 0.1s;
}

.tool-card:hover {
  box-shadow: var(--shadow-md);
  border-color: #C0BDB4;
  transform: translateY(-1px);
}

.tool-card-icon {
  font-size: 22px;
  margin-bottom: 10px;
}

.tool-card-title {
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--text);
  margin-bottom: 4px;
}

.tool-card-desc {
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.5;
}

.tool-card.wip {
  opacity: 0.55;
  pointer-events: none;
}

.tool-card.wip .tool-card-title::after {
  content: ' — coming soon';
  font-family: var(--font-body);
  font-size: 11px;
  color: var(--text-3);
}

/* ── Responsive — mobile-first improvements ─────── */

/* ── Nav hamburger logic ─────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
  border-radius: var(--radius);
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.2s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 680px) {
  /* Nav */
  #site-nav {
    padding: 0 1rem;
    gap: 0.75rem;
    flex-wrap: wrap;
    height: auto;
    min-height: var(--nav-h);
    position: sticky;
    top: 0;
    z-index: 100;
  }

  .nav-brand {
    font-size: 16px;
    flex: 1;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 2px;
    padding: 0.5rem 0 0.75rem;
    border-top: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 10px 12px;
    font-size: 14px;
    border-radius: var(--radius);
  }

  /* Page shell */
  .page-wrap {
    padding: 1.25rem 1rem 3rem;
  }

  .page-header {
    margin-bottom: 1.25rem;
  }

  .page-header h1 {
    font-size: clamp(24px, 6vw, 32px);
  }

  /* Metrics — 2 columns on mobile, numbers readable */
  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .metric {
    padding: 0.7rem 0.85rem;
  }

  .metric-value {
    font-size: 17px;
  }

  .metric-label {
    font-size: 11px;
  }

  /* Cards */
  .card {
    padding: 1.1rem 1rem;
  }

  /* Field grid already collapses to 1col — just tighten gap */
  .field-grid {
    gap: 0.75rem;
  }

  .field input,
  .field select {
    height: 42px; /* Larger tap target on mobile */
    font-size: 16px; /* Prevents iOS zoom-on-focus */
  }

  /* Slider rows — label + slider + value readable */
  .slider-row {
    gap: 8px;
  }

  .slider-row input[type=range] {
    min-width: 0;
  }

  .slider-row .slider-val {
    min-width: 48px;
    font-size: 12.5px;
  }

  /* Toggle pills — wrap freely, slightly larger tap target */
  .toggle-group {
    gap: 5px;
  }

  .toggle-pill {
    padding: 7px 12px;
    font-size: 12px;
  }

  /* Tool grid — homepage cards stack to 1 col below 480px */
  .tool-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-top: 1.5rem;
  }

  .tool-card {
    padding: 1rem 1.1rem;
    display: flex;
    align-items: flex-start;
    gap: 12px;
  }

  .tool-card-icon {
    font-size: 20px;
    margin-bottom: 0;
    margin-top: 2px;
    flex-shrink: 0;
  }

  .tool-card-title {
    font-size: 16px;
    margin-bottom: 2px;
  }

  /* Schedule table — smaller text and padding on mobile */
  .schedule-table {
    font-size: 11.5px;
  }

  .schedule-table th,
  .schedule-table td {
    padding: 6px 8px;
  }

  /* Legend — tighter on mobile */
  .legend {
    gap: 10px;
  }

  .legend-item {
    font-size: 11.5px;
  }
}

/* Very narrow phones (< 380px) */
@media (max-width: 380px) {
  .metrics {
    grid-template-columns: 1fr;
  }

  .metric-value {
    font-size: 20px;
  }
}