:root {
  --bg: #0f0c0a;
  --panel: rgba(23, 16, 13, 0.84);
  --panel-strong: rgba(30, 21, 17, 0.96);
  --line: rgba(204, 154, 96, 0.26);
  --text: #f0e6d2;
  --muted: #baa88d;
  --accent: #d5a264;
  --accent-strong: #f2bf7b;
  --danger: #ff9070;
  --success: #7fd6a9;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.42);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Palatino Linotype", "Microsoft YaHei UI", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(172, 108, 49, 0.18), transparent 28%),
    radial-gradient(circle at right 20%, rgba(117, 58, 25, 0.2), transparent 30%),
    linear-gradient(145deg, #090705, #18110d 48%, #0d0a08);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at center, black 52%, transparent 100%);
  pointer-events: none;
}

.page-shell {
  width: min(1500px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 28px 0 36px;
}

.hero {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 24px;
}

.hero-copy,
.panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero-copy {
  padding: 34px;
}

.hero-copy::after,
.panel::after {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: calc(var(--radius) - 1px);
  border: 1px solid rgba(255, 255, 255, 0.03);
  pointer-events: none;
}

.eyebrow,
.kicker,
.hexagram-label {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "STKaiti", "KaiTi", "Georgia", serif;
  font-weight: 600;
}

h1 {
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1;
}

h2 {
  font-size: 30px;
}

h3 {
  font-size: 24px;
}

.hero-text {
  max-width: 40rem;
  margin: 18px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.hero-orbit {
  position: relative;
  min-height: 260px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background:
    radial-gradient(circle at center, rgba(213, 162, 100, 0.16), transparent 37%),
    repeating-radial-gradient(circle at center, rgba(213, 162, 100, 0.15) 0 2px, transparent 2px 22px),
    rgba(16, 11, 8, 0.74);
  box-shadow: var(--shadow);
}

.hero-orbit::before,
.hero-orbit::after {
  content: "";
  position: absolute;
  inset: 18px;
  border-radius: 999px;
  border: 1px dashed rgba(213, 162, 100, 0.26);
}

.hero-orbit::after {
  inset: 48px;
  animation: spin 26s linear infinite;
}

.coin {
  position: absolute;
  width: 82px;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, #f9d9a9, #c98638 54%, #6e4218 100%);
  box-shadow:
    inset 0 2px 12px rgba(255, 255, 255, 0.25),
    0 16px 26px rgba(0, 0, 0, 0.34);
}

.coin::after {
  content: "";
  position: absolute;
  inset: 22px;
  border-radius: 50%;
  border: 2px solid rgba(80, 41, 12, 0.72);
}

.coin-a { top: 28px; left: 48px; animation: float 5s ease-in-out infinite; }
.coin-b { right: 56px; top: 92px; animation: float 4.8s ease-in-out infinite 0.8s; }
.coin-c { left: 50%; bottom: 22px; transform: translateX(-50%); animation: float 5.4s ease-in-out infinite 0.3s; }

.dashboard {
  display: grid;
  grid-template-columns: 420px 1fr 1fr;
  gap: 24px;
}

.panel {
  padding: 24px;
  background: var(--panel-strong);
}

.panel-heading {
  margin-bottom: 20px;
}

.method-switch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  border: none;
}

.method-switch legend {
  margin-bottom: 12px;
  color: var(--muted);
}

.switch-pill {
  position: relative;
  display: block;
}

.switch-pill input {
  position: absolute;
  opacity: 0;
}

.switch-pill span {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-align: center;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
  transition: 180ms ease;
  cursor: pointer;
}

.switch-pill input:checked + span {
  color: #23160c;
  background: linear-gradient(120deg, #f0c17c, #b77a41);
  border-color: transparent;
  box-shadow: 0 12px 26px rgba(183, 122, 65, 0.28);
}

.form-grid,
.manual-grid,
.number-grid {
  display: grid;
  gap: 14px;
}

.form-grid {
  width: 100%;
  grid-template-columns: minmax(0, 1fr) !important;
}

.manual-grid {
  grid-template-columns: repeat(2, 1fr);
}

.number-grid {
  grid-template-columns: repeat(3, 1fr);
}

.field {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.field input {
  width: 100%;
  padding: 13px 14px;
  color: var(--text);
  border: 1px solid rgba(213, 162, 100, 0.2);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  outline: none;
  transition: border-color 180ms ease, transform 180ms ease;
}

.field input:focus {
  border-color: rgba(242, 191, 123, 0.76);
  transform: translateY(-1px);
}

.checkbox {
  grid-template-columns: 18px 1fr;
  align-items: center;
  margin-top: 22px;
}

.checkbox input {
  width: 18px;
  height: 18px;
  margin: 0;
}

.hint {
  margin: 0;
  padding: 14px 16px;
  color: var(--muted);
  line-height: 1.7;
  border: 1px dashed rgba(213, 162, 100, 0.28);
  border-radius: 16px;
  background: rgba(213, 162, 100, 0.06);
}

.method-panel {
  display: none;
  margin-top: 18px;
}

.method-panel.active {
  display: block;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.action {
  border: none;
  border-radius: 999px;
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 180ms ease, opacity 180ms ease;
}

.action:hover {
  transform: translateY(-1px);
}

.action:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.primary {
  color: #1e1108;
  background: linear-gradient(120deg, #f4c786, #b36d33);
}

.secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(213, 162, 100, 0.28);
}

.tertiary {
  color: var(--accent-strong);
  background: rgba(213, 162, 100, 0.08);
  border: 1px dashed rgba(213, 162, 100, 0.36);
}

.status-banner,
.summary-card,
.hexagram-card,
.interpretation {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.03);
}

.status-banner {
  margin-bottom: 16px;
  padding: 12px 14px;
  color: var(--muted);
}

.status-banner.success {
  color: var(--success);
}

.status-banner.error {
  color: var(--danger);
}

.summary-card {
  padding: 18px;
}

.summary-card.empty,
.interpretation.empty {
  color: var(--muted);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.summary-item {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
}

.summary-item strong {
  display: block;
  margin-bottom: 6px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hexagram-stack {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.hexagram-card {
  padding: 18px;
}

.hexagram-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(213, 162, 100, 0.14);
}

.hexagram-meta {
  color: var(--muted);
  text-align: right;
  line-height: 1.7;
}

.hexagram-body {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 16px;
}

.hexagram-lines {
  display: grid;
  gap: 12px;
}

.line-row {
  display: grid;
  grid-template-columns: 42px 1fr 28px;
  gap: 10px;
  align-items: center;
}

.line-tag {
  color: var(--muted);
  font-size: 13px;
}

.line-shape {
  position: relative;
  height: 16px;
}

.line-segment {
  position: absolute;
  top: 0;
  height: 16px;
  border-radius: 999px;
  background: linear-gradient(90deg, #f1d2a4, #b47437);
  box-shadow: 0 0 16px rgba(235, 177, 104, 0.18);
}

.line-segment.yang {
  left: 0;
  right: 0;
}

.line-segment.yin.left {
  left: 0;
  width: 42%;
}

.line-segment.yin.right {
  right: 0;
  width: 42%;
}

.line-moving {
  color: var(--accent-strong);
  font-size: 18px;
  text-align: center;
}

.yao-detail {
  display: grid;
  gap: 10px;
}

.yao-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
}

.yao-item .meta {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.badge {
  display: inline-block;
  margin-right: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  color: #2e1a0a;
  font-size: 12px;
  background: linear-gradient(120deg, #f0c17c, #b77944);
}

.interpretation {
  min-height: 620px;
  padding: 18px;
  line-height: 1.8;
}

.interpretation h1,
.interpretation h2,
.interpretation h3,
.interpretation h4 {
  margin: 1.3em 0 0.45em;
}

.interpretation h4 {
  color: var(--accent-strong);
  font-size: 1rem;
}

.interpretation ul {
  padding-left: 1.2rem;
}

.interpretation blockquote {
  margin: 1rem 0;
  padding-left: 1rem;
  border-left: 2px solid rgba(213, 162, 100, 0.45);
  color: var(--muted);
}

.loading::after {
  content: " · 正在推演";
  animation: pulse 1.2s infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

@media (max-width: 1200px) {
  .dashboard {
    grid-template-columns: 1fr;
  }

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

  .hexagram-body {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 20px, 100%);
  }

  .form-grid,
  .manual-grid,
  .number-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .method-switch {
    grid-template-columns: 1fr;
  }

  .action-row {
    flex-direction: column;
  }
}