/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --gold:       #c9a84c;
  --gold-light: #e6c97a;
  --gold-dim:   #7a6030;
  --bg:         #0d0b14;
  --bg-card:    #15121f;
  --bg-card2:   #1c1828;
  --border:     #2e2843;
  --text:       #e8e2f5;
  --text-muted: #8b82a8;
  --purple:     #7c5cbf;
  --purple-light: #a07ee0;
  --radius:     14px;
  --shadow:     0 4px 24px rgba(0,0,0,.45);
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ── Header ── */
.site-header {
  background: linear-gradient(160deg, #1a1030 0%, #0d0b14 60%);
  border-bottom: 1px solid var(--border);
  padding: 3rem 1.5rem 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(124,92,191,.18) 0%, transparent 70%);
  pointer-events: none;
}

.header-symbol {
  font-size: 2rem;
  color: var(--gold);
  display: block;
  margin-bottom: .6rem;
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { text-shadow: 0 0 8px rgba(201,168,76,.3); }
  50%       { text-shadow: 0 0 24px rgba(201,168,76,.8); }
}

.site-header h1 {
  font-family: 'Cinzel', serif;
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold-light), var(--gold), #a07030);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: .04em;
}

.header-sub {
  margin-top: .6rem;
  color: var(--text-muted);
  font-size: .95rem;
  font-weight: 300;
  letter-spacing: .02em;
}

/* ── Main layout ── */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

/* ── Form section ── */
.form-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 580px) {
  .form-grid { grid-template-columns: 1fr; }
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.field-group label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: .07em;
  text-transform: uppercase;
}

.field-group input {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  padding: .7rem 1rem;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  -webkit-appearance: none;
  color-scheme: dark;
}

.field-group input:focus {
  border-color: var(--purple);
  box-shadow: 0 0 0 3px rgba(124,92,191,.2);
}

.field-hint {
  font-size: .75rem;
  color: var(--text-muted);
}

.form-error {
  color: #f87171;
  font-size: .88rem;
  margin-top: .5rem;
  padding: .5rem .75rem;
  background: rgba(248,113,113,.08);
  border-radius: 6px;
  border: 1px solid rgba(248,113,113,.2);
}

.btn-calculate {
  margin-top: 1.5rem;
  width: 100%;
  background: linear-gradient(135deg, var(--purple) 0%, #5a3d9a 100%);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-family: 'Cinzel', serif;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: .06em;
  padding: .9rem 2rem;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s, background .2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
}

.btn-calculate:hover {
  background: linear-gradient(135deg, var(--purple-light) 0%, var(--purple) 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(124,92,191,.4);
}

.btn-calculate:active { transform: translateY(0); }

.btn-icon { font-size: 1rem; color: var(--gold-light); }

/* ── Tabs ── */
.tabs-bar {
  display: flex;
  gap: .5rem;
  margin-bottom: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .35rem;
  overflow-x: auto;
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: 'Inter', sans-serif;
  font-size: .9rem;
  font-weight: 500;
  padding: .6rem 1rem;
  border-radius: 9px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .2s, color .2s;
}

.tab-btn:hover { color: var(--text); background: var(--bg-card2); }

.tab-btn.active {
  background: linear-gradient(135deg, var(--purple) 0%, #5a3d9a 100%);
  color: #fff;
  font-weight: 600;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── Section intro ── */
.section-intro {
  margin-bottom: 1.75rem;
}

.section-intro h2 {
  font-family: 'Cinzel', serif;
  font-size: 1.5rem;
  color: var(--gold-light);
  margin-bottom: .4rem;
}

.section-intro p {
  color: var(--text-muted);
  font-size: .92rem;
  max-width: 680px;
}

/* ── Number cards ── */
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.number-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.2rem;
  text-align: center;
  transition: transform .2s, box-shadow .2s;
}

.number-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,.5);
}

.number-card.highlight {
  border-color: var(--gold-dim);
  background: linear-gradient(160deg, #1e1830 0%, var(--bg-card) 100%);
  position: relative;
  overflow: hidden;
}

.number-card.highlight::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.card-label {
  font-size: .75rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: .6rem;
}

.card-number {
  font-family: 'Cinzel', serif;
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: .3rem;
}

.card-compound {
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: .1rem;
}

.card-compound::before { content: 'Compound: '; }

.card-raw {
  font-size: .78rem;
  color: var(--text-muted);
  margin-bottom: .5rem;
}

.card-meaning {
  font-size: .8rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: .5rem;
  padding-top: .5rem;
  border-top: 1px solid var(--border);
}

/* ── Letter table ── */
.letter-table-section {
  margin-bottom: 2rem;
}

.letter-table-section h3,
.chart-reference h3 {
  font-family: 'Cinzel', serif;
  font-size: 1rem;
  color: var(--gold-light);
  margin-bottom: .85rem;
  letter-spacing: .04em;
}

.letter-table {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.letter-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: .4rem .55rem;
  min-width: 38px;
  text-align: center;
}

.letter-chip.vowel { border-color: var(--purple); background: rgba(124,92,191,.12); }

.letter-chip .lc-letter {
  font-family: 'Cinzel', serif;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
}

.letter-chip.vowel .lc-letter { color: var(--purple-light); }

.letter-chip .lc-value {
  font-size: .72rem;
  color: var(--gold);
  font-weight: 600;
}

/* ── Chart reference ── */
.chart-reference {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: .25rem;
  max-width: 400px;
}

.chart-grid.chaldean-chart {
  grid-template-columns: repeat(8, 1fr);
}

.chart-row {
  display: contents;
}

.chart-row span {
  text-align: center;
  padding: .35rem .2rem;
  font-size: .82rem;
  color: var(--text-muted);
  border-radius: 4px;
}

.chart-row.header-row span {
  color: var(--gold);
  font-weight: 700;
  font-size: .85rem;
  border-bottom: 1px solid var(--border);
}

/* ── Compound note ── */
.compound-note {
  background: rgba(201,168,76,.06);
  border: 1px solid rgba(201,168,76,.2);
  border-radius: 8px;
  padding: .85rem 1.1rem;
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.compound-note strong { color: var(--gold); }

/* ── Lo Shu Grid ── */
.loshu-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.loshu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .6rem;
  width: min(320px, 100%);
}

.loshu-cell {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 12px;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .15rem;
  transition: transform .2s;
}

.loshu-cell:hover { transform: scale(1.04); }

.loshu-cell.present {
  border-color: var(--gold-dim);
  background: linear-gradient(145deg, #1e1a30, #15121f);
}

.loshu-cell.missing {
  opacity: .35;
  border-style: dashed;
}

.loshu-cell .cell-num {
  font-family: 'Cinzel', serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}

.loshu-cell.missing .cell-num { color: var(--text-muted); }

.loshu-cell .cell-dots {
  display: flex;
  gap: 2px;
  min-height: 8px;
}

.loshu-cell .cell-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--purple-light);
}

.loshu-cell .cell-count {
  font-size: .7rem;
  color: var(--text-muted);
}

.loshu-legend {
  display: flex;
  gap: 1.5rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .82rem;
  color: var(--text-muted);
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.legend-item.present .legend-dot { background: var(--gold); }
.legend-item.missing .legend-dot { background: var(--text-muted); border: 1px dashed var(--text-muted); }

/* ── Lo Shu planes ── */
.loshu-planes {
  margin-bottom: 2rem;
}

.planes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .85rem;
}

@media (max-width: 580px) {
  .planes-grid { grid-template-columns: 1fr; }
}

.plane-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.plane-label {
  font-weight: 600;
  font-size: .82rem;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .25rem;
}

.plane-numbers {
  font-family: 'Cinzel', serif;
  font-size: .9rem;
  color: var(--purple-light);
  margin-bottom: .4rem;
}

.plane-card p {
  font-size: .8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Lo Shu analysis ── */
.analysis-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: .85rem;
  margin-bottom: 2rem;
}

.analysis-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.analysis-card .ac-num {
  font-family: 'Cinzel', serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: .15rem;
}

.analysis-card .ac-planet {
  font-size: .75rem;
  color: var(--purple-light);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .4rem;
}

.analysis-card .ac-trait {
  font-size: .8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.analysis-card .ac-count {
  margin-top: .4rem;
  font-size: .75rem;
  color: var(--gold-dim);
}

/* ── Missing numbers ── */
.missing-list {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
}

.missing-card {
  background: rgba(248,113,113,.05);
  border: 1px dashed rgba(248,113,113,.25);
  border-radius: 10px;
  padding: .85rem 1.1rem;
  min-width: 180px;
}

.missing-card .mc-num {
  font-family: 'Cinzel', serif;
  font-size: 1.4rem;
  color: #f87171;
  margin-bottom: .2rem;
}

.missing-card .mc-label {
  font-size: .72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .3rem;
}

.missing-card .mc-trait {
  font-size: .8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Prediction section ── */
.prediction-section {
  margin-bottom: 2rem;
}

.prediction-section h3,
.loshu-planes h3,
.loshu-numbers-detail h3,
.loshu-missing-section h3 {
  font-family: 'Cinzel', serif;
  font-size: 1rem;
  color: var(--gold-light);
  margin-bottom: .85rem;
  letter-spacing: .04em;
}

.predictions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.pred-card {
  background: linear-gradient(145deg, #1a1530 0%, var(--bg-card) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  position: relative;
  overflow: hidden;
  transition: transform .2s, box-shadow .2s;
}

.pred-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(124,92,191,.6), transparent);
}

.pred-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,0,0,.45);
}

.pred-icon {
  font-size: 1.2rem;
  color: var(--gold);
  margin-bottom: .5rem;
  line-height: 1;
}

.pred-title {
  font-family: 'Cinzel', serif;
  font-size: .9rem;
  font-weight: 600;
  color: var(--gold-light);
  margin-bottom: .6rem;
  line-height: 1.4;
}

.pred-body {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── Utility ── */
.hidden { display: none !important; }

/* ── Footer ── */
.site-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: .8rem;
  border-top: 1px solid var(--border);
}