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

/* ─── Design Tokens ─────────────────────────────────────────── */
:root {
  --bg:          #0f0e0c;
  --bg-card:     #1a1916;
  --bg-input:    #13120f;
  --border:      #2e2c27;
  --border-soft: #232118;

  --text:        #e8e3d8;
  --text-muted:  #a89878;
  --text-dim:    #4a453d;

  --accent:      #d4a843;
  --accent-soft: rgba(212, 168, 67, 0.12);
  --accent-glow: rgba(212, 168, 67, 0.25);

  --good:        #6db87a;
  --warn:        #d4a843;
  --bad:         #c96a55;

  --radius:      8px;
  --radius-lg:   14px;
  --gap:         1.5rem;

  --font-display: 'DM Serif Display', Georgia, serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;
}

/* ─── Light Theme ─────────────────────────────────────────────── */
html[data-theme="light"] {
  --bg:          #faf9f7;
  --bg-card:     #f3f1ed;
  --bg-input:    #ede9e2;
  --border:      #e0dbd3;
  --border-soft: #e8e3db;

  --text:        #2a2520;
  --text-muted:  #6b6158;
  --text-dim:    #99897d;

  --accent:      #b8860b;
  --accent-soft: rgba(184, 134, 11, 0.12);
  --accent-glow: rgba(184, 134, 11, 0.25);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: 0.875rem;
  line-height: 1.6;
  min-height: 100vh;
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background: rgba(15, 14, 12, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
}

html[data-theme="light"] .site-header {
  background: rgba(250, 249, 247, 0.92);
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent);
  text-decoration: none;
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 1rem;
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.page-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 400;
  line-height: 1.15;
  margin-bottom: 0.4rem;
}

.page-subtitle {
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-size: 0.85rem;
}

.section-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.85rem;
}

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

/* ─── Tool Cards (index) ─────────────────────────────────────── */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.tool-card {
  display: block;
  text-decoration: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color 0.2s, transform 0.18s, box-shadow 0.2s;
}

.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.tool-card-icon { font-size: 1.8rem; margin-bottom: 0.75rem; }

.tool-card-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.tool-card-desc {
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.55;
}

/* ─── Form ──────────────────────────────────────────────────── */
.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.field label {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.field input[type="number"],
.field input[type="text"] {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.5rem 0.7rem;
  width: 100%;
  transition: border-color 0.15s, box-shadow 0.15s;
  -moz-appearance: textfield;
}

.field input::-webkit-outer-spin-button,
.field input::-webkit-inner-spin-button { -webkit-appearance: none; }

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.field .hint {
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}

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

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 500;
}

.btn-primary:hover { background: #e0b64f; border-color: #e0b64f; color: var(--bg); }

/* ─── Progress Bars ─────────────────────────────────────────── */
.bar-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.bar-label { width: 90px; font-size: 0.75rem; color: var(--text-muted); flex-shrink: 0; }

.bar-track {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.4s ease;
}

.bar-fill.protein { background: var(--good); }
.bar-fill.fat     { background: var(--warn); }
.bar-fill.carbs   { background: var(--bad);  }

.bar-val { width: 52px; text-align: right; font-size: 0.78rem; }

/* ─── Result Blocks ─────────────────────────────────────────── */
.result-block {
  background: var(--bg-input);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}

.result-block .label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.2rem;
}

.result-block .value {
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1;
  color: var(--text);
}

.result-block .unit {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
}

.result-block.good { border-color: rgba(109,184,122,0.3); background: rgba(109,184,122,0.06); }
.result-block.warn { border-color: rgba(212,168,67,0.3);  background: rgba(212,168,67,0.06);  }
.result-block.bad  { border-color: rgba(201,106,85,0.3);  background: rgba(201,106,85,0.06);  }

/* ─── Colour helpers ────────────────────────────────────────── */
.good, .text-good { color: var(--good); }
.warn, .text-warn { color: var(--warn); }
.bad,  .text-bad  { color: var(--bad);  }
.text-muted       { color: var(--text-muted); }
.text-dim         { color: var(--text-dim); }
.text-accent      { color: var(--accent); }

/* ─── Table ─────────────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }

.data-table th {
  text-align: left;
  font-weight: 500;
  color: var(--text-muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.data-table td { padding: 0.65rem 0.75rem; border-bottom: 1px solid var(--border-soft); }
.data-table tr:last-child td { border-bottom: none; }

/* ─── Misc ──────────────────────────────────────────────────── */
hr.divider { border: none; border-top: 1px solid var(--border); margin: 1.25rem 0; }

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* ─── Calculator page ────────────────────────────────────────── */

/* Mobile-first: single column, plain block flow */
.calc-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Desktop: 2×2 grid */
@media (min-width: 1001px) {
  .calc-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    align-items: start;
  }
  .inputs-card {
    grid-column: 1;
    grid-row: 1;
    position: sticky;
    top: 1.5rem;
    align-self: start;
  }
  .results-panel {
    grid-column: 2;
    grid-row: 1;
  }
  .kcal-panel {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

/* Single-column: remove sticky header so nothing floats */
@media (max-width: 1000px) {
  .site-header {
    position: static;
    backdrop-filter: none;
  }
}

/* Inputs */
.inputs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.inputs-grid .span-2 { grid-column: 1 / -1; }

@media (max-width: 480px) {
  .inputs-grid {
    grid-template-columns: 1fr;
  }
  .inputs-grid .span-2 { grid-column: 1; }
}

/* Result grid */
.result-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.result-block.full { grid-column: 1 / -1; }

/* Ranges table */
.ranges-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  margin-top: 1.5rem;
}

.ranges-wrap .data-table th,
.ranges-wrap .data-table td { padding: 0.6rem 1rem; }

.chip {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 500;
}

.chip.good { color: var(--good); background: rgba(109,184,122,0.12); }
.chip.warn { color: var(--warn); background: rgba(212,168,67,0.12);  }
.chip.bad  { color: var(--bad);  background: rgba(201,106,85,0.12);  }

.ranges-note {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.6rem;
  padding: 0 0.25rem;
}

/* Results header */
.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.result-header .name {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}

.result-header .date {
  font-size: 0.85rem;
  color: var(--text-dim);
  white-space: nowrap;
  margin-left: 1rem;
}

/* Raw values reference */
.raw-values {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 0.5rem;
  padding: 0.5rem 0;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  column-gap: 1.5rem;
}

.raw-values-item {
  display: flex;
  justify-content: space-between;
}

.raw-values-label {
  font-weight: 500;
}

.raw-values-value {
  color: var(--text);
}

/* Bookmarks */
.bookmarks-sidebar {
  position: absolute;
  top: 50%;
  left: 2rem;
  transform: translateY(-50%);
  z-index: 50;
}

.bookmarks-label {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.8rem;
}

.bookmarks-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.bookmark-btn {
  padding: 0.4rem 0;
  background: transparent;
  border: none;
  font-size: 0.8rem;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.2s, opacity 0.2s;
  text-align: left;
  opacity: 0.6;
}

.bookmark-btn:hover {
  color: var(--text);
  opacity: 1;
}

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 1000px) {
  .bookmarks-sidebar {
    position: static;
    transform: none;
    margin-bottom: 1.5rem;
  }
}

@media (max-width: 640px) {
  .site-header { padding: 0.75rem 1rem; }
  .page-wrap   { padding: 1.5rem 1rem; }
  .tool-grid   { grid-template-columns: 1fr; }
  .bookmarks-sidebar {
    position: static;
    transform: none;
    margin-bottom: 1rem;
  }
  .bookmarks-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.4rem;
  }
  .bookmark-btn {
    padding: 0.35rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.72rem;
    white-space: nowrap;
  }
  .calc-layout {
    gap: 1rem;
  }
  .result-grid {
    grid-template-columns: 1fr;
  }
  .result-block.full { grid-column: 1; }
  .raw-values {
    grid-template-columns: 1fr;
  }
  .result-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
  .result-header .date {
    margin-left: 0;
  }
  .card {
    padding: 1rem;
  }
  .bar-row {
    gap: 0.5rem;
  }
  .bar-label {
    width: 75px;
    font-size: 0.68rem;
  }
}