:root {
  --paper: #f8f1e4;
  --paper-deep: #efe2cd;
  --silk: #fffaf0;
  --ink: #241914;
  --ink-soft: #675342;
  --cinnabar: #a73522;
  --cinnabar-dark: #782718;
  --jade: #2f6f5e;
  --gold: #b8863b;
  --line: rgba(89, 60, 38, 0.2);
  --shadow: 0 24px 80px rgba(54, 31, 17, 0.16);
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  background:
    radial-gradient(circle at 18% 8%, rgba(167, 53, 34, 0.16), transparent 26rem),
    radial-gradient(circle at 84% 16%, rgba(47, 111, 94, 0.12), transparent 24rem),
    linear-gradient(135deg, rgba(120, 39, 24, 0.08) 0 1px, transparent 1px 14px),
    var(--paper);
}

button,
textarea {
  font: inherit;
}

.shell {
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 16px 0 28px;
}

.hero {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 22px;
  align-items: center;
  min-height: 118px;
}

.brand-mark {
  display: grid;
  gap: 2px;
  place-items: center;
  width: 86px;
  aspect-ratio: 1;
  color: var(--silk);
  font-family: var(--serif);
  background: var(--cinnabar);
  border: 3px double rgba(255, 250, 240, 0.72);
  box-shadow: 0 18px 44px rgba(120, 39, 24, 0.26);
}

.brand-mark span {
  font-size: 36px;
  line-height: 1;
}

.brand-mark small {
  color: rgba(255, 250, 240, 0.88);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

.eyebrow,
.result-label,
.number-card span,
.number-card small {
  margin: 0;
  color: var(--cinnabar);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
}

h1,
h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0;
}

h1 {
  margin-top: 6px;
  font-size: clamp(38px, 5vw, 62px);
  line-height: 1.04;
}

.subtitle {
  max-width: 680px;
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.6;
}

.divination-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(470px, 0.95fr) minmax(520px, 1.05fr);
  grid-template-areas:
    "left right"
    "links links";
  gap: 12px;
  padding: 16px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(184, 134, 59, 0.12) 1px, transparent 1px 68px),
    linear-gradient(rgba(184, 134, 59, 0.1) 1px, transparent 1px 68px),
    rgba(255, 250, 240, 0.78);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.divination-panel::before {
  position: absolute;
  inset: 14px;
  pointer-events: none;
  border: 1px solid rgba(167, 53, 34, 0.18);
  content: "";
}

.question-block,
.numbers,
.result,
.method-card,
.calculation,
.prompt-block,
.ai-links,
.dashboard-left,
.dashboard-right {
  position: relative;
  z-index: 1;
}

.dashboard-left {
  grid-area: left;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  gap: 10px;
  min-width: 0;
}

.dashboard-right {
  grid-area: right;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 10px;
  min-width: 0;
}

.question-block {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
}

.question-block label {
  grid-column: 1 / -1;
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 600;
}

textarea {
  width: 100%;
  min-height: 78px;
  resize: vertical;
  color: var(--ink);
  line-height: 1.7;
  background: rgba(255, 250, 240, 0.86);
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
  padding: 12px 14px;
}

textarea:focus {
  border-color: rgba(167, 53, 34, 0.65);
  box-shadow: 0 0 0 4px rgba(167, 53, 34, 0.12);
}

button {
  min-height: 42px;
  cursor: pointer;
  color: var(--silk);
  font-weight: 700;
  background: var(--cinnabar);
  border: 1px solid rgba(120, 39, 24, 0.35);
  border-radius: 8px;
  padding: 0 24px;
  transition: transform 160ms ease, background 160ms ease, opacity 160ms ease;
}

button:hover:not(:disabled) {
  background: var(--cinnabar-dark);
  transform: translateY(-1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
}

.numbers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.number-card {
  min-height: 88px;
  display: grid;
  align-content: center;
  gap: 7px;
  padding: 14px 12px;
  text-align: center;
  background: rgba(248, 241, 228, 0.82);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.number-card strong {
  min-height: 36px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(26px, 2.8vw, 38px);
  font-weight: 700;
  line-height: 1.1;
}

.number-card.is-rolling strong {
  animation: numberPulse 260ms ease-in-out infinite alternate;
}

@keyframes numberPulse {
  from {
    transform: translateY(0);
    opacity: 0.62;
  }
  to {
    transform: translateY(-3px);
    opacity: 1;
  }
}

.result {
  display: grid;
  grid-template-columns: 236px 1fr;
  gap: 16px;
  align-items: center;
  min-height: 168px;
  padding: 14px;
  background: linear-gradient(135deg, rgba(47, 111, 94, 0.08), rgba(255, 250, 240, 0.78));
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hexagram-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: start;
}

.hexagram-stack {
  display: grid;
  justify-items: center;
  gap: 10px;
}

.hexagram-stack p {
  margin: 0;
  color: var(--cinnabar);
  font-size: 13px;
  font-weight: 700;
}

.hexagram-lines {
  display: grid;
  gap: 7px;
  width: 94px;
  margin: 0 auto;
}

.hexagram-lines.muted {
  opacity: 0.22;
}

.yao {
  display: flex;
  gap: 12px;
  height: 9px;
}

.yao::before,
.yao::after {
  flex: 1;
  background: var(--ink);
  content: "";
}

.yao.yang::after {
  display: none;
}

.yao.moving::before,
.yao.moving::after {
  background: var(--cinnabar);
  box-shadow: 0 0 0 3px rgba(167, 53, 34, 0.12);
}

.result h2 {
  margin-top: 6px;
  color: var(--jade);
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.1;
}

.result-copy p:last-child {
  max-width: 660px;
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.55;
}

.method-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-items: center;
  padding: 12px;
  background: rgba(248, 241, 228, 0.76);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.method-card p:last-child {
  margin: 6px 0 0;
  color: var(--ink-soft);
  line-height: 1.55;
  font-size: 13px;
}

.trigram-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
}

.trigram-cell {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  align-items: center;
  min-height: 42px;
  padding: 6px 8px;
  background: rgba(255, 250, 240, 0.74);
  border: 1px solid rgba(89, 60, 38, 0.16);
  border-radius: 6px;
}

.trigram-cell strong {
  display: grid;
  place-items: center;
  width: 24px;
  aspect-ratio: 1;
  color: var(--silk);
  font-size: 12px;
  background: var(--cinnabar);
  border-radius: 50%;
}

.trigram-cell span {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
}

.trigram-cell small {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
}

.calculation {
  display: grid;
  gap: 8px;
  align-content: stretch;
}

.calc-step {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  align-items: start;
  min-height: 66px;
  padding: 8px 10px;
  background: rgba(255, 250, 240, 0.68);
  border: 1px solid rgba(89, 60, 38, 0.16);
  border-radius: 8px;
  opacity: 0.72;
  transform: translateY(2px);
  transition: opacity 260ms ease, transform 260ms ease, border-color 260ms ease, background 260ms ease;
}

.calc-step > span {
  display: grid;
  place-items: center;
  width: 28px;
  aspect-ratio: 1;
  color: var(--cinnabar);
  font-family: var(--serif);
  font-weight: 700;
  background: var(--paper-deep);
  border: 1px solid rgba(167, 53, 34, 0.24);
  border-radius: 50%;
}

.calc-step h3 {
  margin: 0;
  color: var(--ink);
  font-size: 14px;
}

.calc-step p {
  margin: 4px 0 0;
  color: var(--ink-soft);
  line-height: 1.5;
  font-size: 13px;
}

.calc-step.is-active {
  opacity: 1;
  transform: translateY(0);
  background: rgba(255, 250, 240, 0.88);
  border-color: rgba(167, 53, 34, 0.32);
}

.prompt-block {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 12px 14px;
  background:
    linear-gradient(90deg, rgba(167, 53, 34, 0.08), transparent 58%),
    rgba(255, 250, 240, 0.86);
  border: 1px solid rgba(167, 53, 34, 0.22);
  border-radius: 8px;
  box-shadow: inset 4px 0 0 rgba(167, 53, 34, 0.58);
}

.prompt-block .result-label {
  color: var(--cinnabar);
}

#promptText {
  margin: 6px 0 0;
  color: var(--ink);
  line-height: 1.5;
  font-size: 13px;
  white-space: pre-line;
}

.ai-links {
  grid-area: links;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 10px;
}

.prompt-mobile-anchor {
  display: none;
}

.ai-link {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 8px;
  min-height: 68px;
  padding: 8px 8px;
  color: var(--ink);
  text-decoration: none;
  background: rgba(255, 250, 240, 0.82);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.ai-link span {
  display: grid;
  place-items: center;
  width: 36px;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--silk);
  border: 1px solid rgba(89, 60, 38, 0.16);
  border-radius: 50%;
}

.ai-link img {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.ai-link small {
  max-width: 100%;
  overflow-wrap: anywhere;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
}

.ai-link::after {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  width: max-content;
  max-width: 260px;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, 4px);
  color: var(--silk);
  font-size: 12px;
  background: var(--ink);
  border-radius: 6px;
  padding: 7px 9px;
  content: "向 " attr(data-ai) " 寻求解答";
  transition: opacity 160ms ease, transform 160ms ease;
}

.ai-link[data-prompt-mode="copy"]::after {
  content: "自动填入不稳定，将先复制 prompt 再打开 " attr(data-ai);
}

.ai-link[data-prompt-mode="direct"]::after {
  content: "可尝试自动带入 prompt，并会同时复制";
}

.ai-link.copied::after {
  content: "已复制 prompt";
  opacity: 1;
  transform: translate(-50%, 0);
}

.ai-link:hover {
  transform: translateY(-2px);
  border-color: rgba(167, 53, 34, 0.42);
  background: var(--silk);
}

.ai-link:hover::after {
  opacity: 1;
  transform: translate(-50%, 0);
}

.grok span { background: #111111; }

@media (max-width: 820px) {
  .hero,
  .question-block,
  .result,
  .method-card,
  .divination-panel,
  .prompt-block {
    grid-template-columns: 1fr;
  }

  .divination-panel {
    grid-template-areas:
      "left"
      "right"
      "prompt"
      "links";
  }

  .prompt-block {
    grid-area: prompt;
  }

  .dashboard-left,
  .dashboard-right {
    grid-template-rows: none;
  }

  .hexagram-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero {
    justify-items: start;
    min-height: auto;
    padding: 22px 0 30px;
  }

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

  .ai-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .trigram-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .prompt-mobile-anchor {
    display: block;
  }

  .divination-panel {
    padding: 18px;
  }

  .prompt-block button,
  .question-block button {
    width: 100%;
  }
}