:root {
  --panel: rgba(33, 25, 17, 0.88);
  --panel-soft: rgba(54, 41, 28, 0.9);
  --ink: #f8f2e7;
  --muted: #d4c7b0;
  --accent-soft: #e4b878;
  --accent: #ca8f43;
  --line: rgba(231, 218, 192, 0.18);
  --shadow: 0 24px 60px rgba(28, 18, 10, 0.28);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Serif SC", "Source Han Serif SC", "STSong", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(199, 142, 59, 0.28), transparent 30%),
    radial-gradient(circle at bottom right, rgba(70, 54, 35, 0.2), transparent 35%),
    linear-gradient(145deg, #f3ebda 0%, #dcc6a7 42%, #b49164 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(57, 39, 19, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 39, 19, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  mask-image: radial-gradient(circle at center, black 40%, transparent 100%);
}

.page-shell {
  width: min(1240px, calc(100% - 40px));
  margin: 24px auto 60px;
}

.hero-card, .panel {
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.9fr);
  gap: 28px;
  padding: 36px;
  background:
    radial-gradient(circle at top right, rgba(202, 143, 67, 0.18), transparent 28%),
    linear-gradient(120deg, rgba(33, 25, 17, 0.95), rgba(59, 43, 27, 0.9));
  border-radius: 30px;
  overflow: hidden;
}

.eyebrow { margin: 0 0 10px; color: var(--accent-soft); letter-spacing: 0.28em; font-size: 12px; }
h1, h2, h3, p { margin: 0; }
h1 { font-size: clamp(2.8rem, 7vw, 5rem); line-height: 0.95; }
.hero-text { margin-top: 14px; max-width: 56ch; color: var(--muted); line-height: 1.7; }
.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.hero-points span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  color: #f5e4bf;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
}

.hero-bagua {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  align-content: center;
  font-size: clamp(2rem, 5vw, 3rem);
}

.hero-bagua span {
  display: grid;
  place-items: center;
  min-height: 92px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.grid {
  display: grid;
  grid-template-columns: minmax(340px, 0.8fr) minmax(0, 1.2fr);
  gap: 22px;
  margin-top: 22px;
  align-items: start;
}
.panel {
  background: linear-gradient(180deg, var(--panel), var(--panel-soft));
  border-radius: 26px;
  padding: 26px;
}
.form-panel { position: sticky; top: 20px; }
.result-panel {
  min-height: 740px;
}

.panel-title {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 18px;
}

.panel-title p { color: var(--muted); font-size: 14px; }
.field { display: block; margin-bottom: 16px; }
.field span { display: block; margin-bottom: 8px; color: var(--accent-soft); font-size: 14px; }
input, textarea, button, summary { font: inherit; }
.coin-panel {
  padding: 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.coin-stage {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  max-width: 240px;
  margin: 0 auto 10px;
  perspective: 1200px;
}
.coin {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  min-height: 64px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 30% 30%, #f7e0b6 0%, #d9ab55 42%, #8a5a20 100%);
  box-shadow:
    inset 0 2px 6px rgba(255, 255, 255, 0.28),
    inset 0 -6px 12px rgba(78, 42, 8, 0.35),
    0 10px 24px rgba(35, 20, 8, 0.28);
  transform-style: preserve-3d;
  will-change: transform;
}
.coin::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 999px;
  border: 2px solid rgba(104, 57, 15, 0.38);
}
.coin span {
  position: relative;
  z-index: 1;
  color: #5a3210;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.coin.is-yang {
  background:
    radial-gradient(circle at 30% 30%, #f9e7c7 0%, #e3bf76 42%, #99621f 100%);
}
.coin.is-yin {
  background:
    radial-gradient(circle at 30% 30%, #eadcc3 0%, #b69564 45%, #6c4d27 100%);
}
.coin.is-rest {
  animation: coin-settle 360ms ease-out;
}
.coin.is-tossing {
  animation: coin-toss-spin 1.2s cubic-bezier(0.2, 0.72, 0.18, 1);
}
.coin[data-coin="1"].is-tossing {
  animation-delay: 0ms;
}
.coin[data-coin="2"].is-tossing {
  animation-delay: 70ms;
}
.coin[data-coin="3"].is-tossing {
  animation-delay: 140ms;
}
.coin-tip {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}
.toss-history {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}
.toss-item {
  display: grid;
  grid-template-columns: 76px 1fr 68px;
  gap: 10px;
  align-items: center;
  padding: 8px 10px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.toss-item span,
.toss-item em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
}
.toss-item strong {
  color: #f7e7c4;
  font-size: 14px;
}
.inline-action {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 128px;
  gap: 10px;
}

input, textarea {
  width: 100%;
  padding: 14px 16px;
  color: var(--ink);
  background: rgba(248, 242, 231, 0.06);
  border: 1px solid rgba(248, 242, 231, 0.12);
  border-radius: 14px;
  outline: none;
}

input:focus, textarea:focus {
  border-color: rgba(228, 184, 120, 0.9);
  box-shadow: 0 0 0 3px rgba(199, 142, 59, 0.18);
}

textarea { resize: vertical; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-tip {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.config-box {
  margin: 18px 0;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.config-box summary { cursor: pointer; color: var(--accent-soft); margin-bottom: 16px; }

button {
  width: 100%;
  padding: 15px 18px;
  border: 0;
  border-radius: 999px;
  color: #281a0f;
  background: linear-gradient(90deg, #f0d2a1, #ca8f43);
  cursor: pointer;
  font-weight: 700;
  box-shadow: 0 12px 24px rgba(202, 143, 67, 0.25);
}

button:disabled { cursor: progress; opacity: 0.75; }
.secondary-button {
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.12), rgba(202, 143, 67, 0.42));
  color: #f7edda;
  box-shadow: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.secondary-button:disabled {
  opacity: 0.85;
}
.hidden { display: none !important; }

.empty-state {
  min-height: 320px;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--muted);
  border: 1px dashed rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  padding: 28px;
}

.result-block + .result-block { margin-top: 22px; }
.result-head {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 22px;
}
.result-badge {
  padding: 16px 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(202, 143, 67, 0.18), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(236, 204, 145, 0.22);
}
.result-badge span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.result-badge strong {
  display: block;
  line-height: 1.5;
  color: #fff0cf;
}
.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.summary-item, .line-item, .interpretation, .kb-preview {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
}

.summary-item { padding: 14px; }
.summary-item span { display: block; margin-bottom: 6px; color: var(--muted); font-size: 13px; }
.summary-item strong { display: block; line-height: 1.5; }
.result-panel h3 {
  margin-bottom: 12px;
  color: #f2d7ac;
}

.line-list { display: flex; flex-direction: column; gap: 10px; }

.line-item {
  display: grid;
  grid-template-columns: 88px 1fr 180px;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
}

.line-item.moving {
  border-color: rgba(231, 195, 141, 0.8);
  background: rgba(199, 142, 59, 0.14);
}

.line-visual {
  letter-spacing: 0.12em;
  font-size: 22px;
  color: #f6e7c7;
}
.line-label, .line-pos { color: var(--muted); }
.interpretation {
  line-height: 2;
  padding: 20px;
  font-size: 15px;
}
.interp-loading {
  display: grid;
  place-items: center;
  min-height: 180px;
  border-radius: 16px;
  color: #f2ddb5;
  background:
    radial-gradient(circle at top, rgba(202, 143, 67, 0.16), transparent 35%),
    rgba(255, 255, 255, 0.03);
  letter-spacing: 0.18em;
  font-size: 15px;
}
.interp-error {
  color: #ffd6c4;
}
.interp-section + .interp-section {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.interp-section h4 {
  margin: 0 0 8px;
  color: #f0d3a0;
  font-size: 16px;
  letter-spacing: 0.08em;
}
.interp-section p {
  margin: 0;
  color: #f7efe2;
}
.interp-section p + p {
  margin-top: 10px;
}
code { font-family: "Consolas", "SFMono-Regular", monospace; color: #f6deb0; }

@media (max-width: 1100px) {
  .grid {
    grid-template-columns: 1fr;
  }
  .form-panel {
    position: static;
  }
  .result-panel {
    min-height: auto;
  }
}

@media (max-width: 900px) {
  .page-shell {
    width: min(100% - 20px, 1180px);
    margin: 10px auto 28px;
  }

  .hero-card, .grid, .summary-grid, .two-col { grid-template-columns: 1fr; }
  .hero-card {
    padding: 20px;
    gap: 18px;
    border-radius: 22px;
  }
  .panel-title {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-bagua {
    grid-template-columns: repeat(4, 1fr);
    font-size: 1.6rem;
  }
  .hero-bagua span {
    min-height: 60px;
    border-radius: 14px;
  }
  .panel {
    padding: 18px;
    border-radius: 20px;
  }
  .result-head {
    grid-template-columns: 1fr;
  }
  .line-item { grid-template-columns: 1fr; gap: 8px; }
  .inline-action {
    grid-template-columns: 1fr;
  }
  .coin-panel {
    padding: 10px;
  }
  .coin-stage {
    gap: 8px;
    max-width: 210px;
  }
  .coin {
    min-height: 56px;
  }
  .coin span {
    font-size: 14px;
  }
  h1 {
    font-size: clamp(2.2rem, 12vw, 3.2rem);
  }
  .interpretation {
    font-size: 14px;
    line-height: 1.8;
    padding: 16px;
  }
  .interp-section h4 {
    font-size: 15px;
  }
  .empty-state {
    min-height: 220px;
  }
}

@media (max-width: 480px) {
  body {
    background:
      radial-gradient(circle at top left, rgba(199, 142, 59, 0.24), transparent 26%),
      linear-gradient(160deg, #f2e7d2 0%, #d6bd97 55%, #ae875b 100%);
  }
  .page-shell {
    width: calc(100% - 16px);
    margin-top: 8px;
  }
  .eyebrow {
    letter-spacing: 0.18em;
  }
  .hero-text {
    font-size: 14px;
  }
  .hero-points {
    gap: 8px;
  }
  .hero-points span {
    min-height: 32px;
    padding: 0 12px;
    font-size: 12px;
  }
  input, textarea, button {
    font-size: 16px;
  }
  textarea {
    min-height: 120px;
  }
  .coin-stage {
    gap: 8px;
    max-width: 186px;
  }
  .coin {
    min-height: 50px;
  }
  .coin-tip {
    font-size: 12px;
  }
  .toss-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .summary-grid {
    gap: 10px;
  }
  .summary-item,
  .result-badge {
    padding: 14px;
  }
  .summary-item strong {
    font-size: 14px;
  }
  .line-visual {
    font-size: 20px;
  }
}

@keyframes coin-toss-spin {
  0% {
    transform: translate3d(0, 0, 0) rotateX(0turn) rotateY(0turn) rotateZ(0deg) scale(1);
  }
  16% {
    transform:
      translate3d(calc(var(--drift-x, 0px) * 0.35), calc(var(--peak-y, -48px) * 0.35), 36px)
      rotateX(calc(var(--flip-count, 5) * 0.18turn))
      rotateY(calc(var(--flip-count, 5) * 0.22turn))
      rotateZ(-7deg)
      scale(1.04);
  }
  38% {
    transform:
      translate3d(calc(var(--drift-x, 0px) * 0.75), var(--peak-y, -48px), 88px)
      rotateX(calc(var(--flip-count, 5) * 0.52turn))
      rotateY(calc(var(--flip-count, 5) * 0.6turn))
      rotateZ(12deg)
      scale(1.09);
  }
  62% {
    transform:
      translate3d(var(--drift-x, 0px), calc(var(--peak-y, -48px) * 0.42), 46px)
      rotateX(calc(var(--flip-count, 5) * 0.82turn))
      rotateY(calc(var(--flip-count, 5) * 0.88turn))
      rotateZ(-10deg)
      scale(1.02);
  }
  84% {
    transform:
      translate3d(calc(var(--drift-x, 0px) * 0.35), 6px, 0)
      rotateX(calc(var(--flip-count, 5) * 0.96turn))
      rotateY(calc(var(--flip-count, 5) * 0.98turn))
      rotateZ(4deg)
      scale(0.96);
  }
  100% {
    transform:
      translate3d(0, 0, 0)
      rotateX(calc(var(--flip-count, 5) * 1turn))
      rotateY(calc(var(--flip-count, 5) * 1turn))
      rotateZ(0deg)
      scale(1);
  }
}

@keyframes coin-settle {
  0% {
    transform: scale(0.96);
  }
  55% {
    transform: scale(1.04);
  }
  100% {
    transform: scale(1);
  }
}