:root {
  color-scheme: light;
  --ink: #1d2528;
  --muted: #66716f;
  --line: #d8ded7;
  --paper: #f8f6ef;
  --panel: #fffdf7;
  --accent: #0f766e;
  --accent-dark: #0b514c;
  --gold: #b48a2c;
  --red: #a13c32;
  --shadow: 0 20px 60px rgba(31, 45, 38, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", Arial, sans-serif;
  color: var(--ink);
  background:
    linear-gradient(rgba(255, 253, 247, 0.78), rgba(255, 253, 247, 0.92)),
    repeating-linear-gradient(90deg, rgba(15, 118, 110, 0.06) 0 1px, transparent 1px 34px),
    var(--paper);
}

button,
input,
textarea {
  font: inherit;
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0 44px;
}

.hero {
  min-height: 190px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1;
  letter-spacing: 0;
}

.hero p {
  margin: 0;
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.eyebrow {
  color: var(--red) !important;
  font-weight: 700;
}

.line .bar {
  height: 16px;
  background: var(--ink);
  border-radius: 2px;
}

.workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 28px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 22px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  color: var(--muted);
}

.section-title span {
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
}

.section-title strong {
  color: var(--gold);
  font-size: 14px;
  text-align: right;
}

.field,
.provider-card {
  display: grid;
  gap: 8px;
}

.field span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

textarea,
input {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 12px;
  outline: none;
}

textarea:focus,
input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}

.mode-row,
.actions,
.ai-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.mode-hint {
  margin: 12px 0 0;
  padding: 12px 14px;
  background: #f0f6f3;
  border-left: 4px solid var(--accent);
  color: #31413f;
  line-height: 1.7;
}

.examples {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.examples p {
  flex-basis: 100%;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.examples button {
  min-height: 36px;
  padding: 8px 10px;
  border-color: #cbd8d1;
  color: #31413f;
  background: #f7fbf8;
  font-size: 14px;
  text-align: left;
}

.examples button:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.mode-button,
button {
  border: 1px solid var(--line);
  color: var(--ink);
  background: #fff;
  padding: 11px 15px;
  min-height: 44px;
  cursor: pointer;
}

.mode-button.active,
.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 800;
}

.primary:hover {
  background: var(--accent-dark);
}

.ghost:hover,
.mode-button:hover {
  border-color: var(--accent);
}

.hex-input {
  margin-top: 16px;
}

.hex-input input {
  text-align: center;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 0;
}

.guide {
  margin-top: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.guide h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 800;
}

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

.hexagram-stage > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-items: start;
  padding: 12px;
  border: 1px solid var(--line);
  background: #fff;
}

.stage-label {
  margin: 0 0 6px;
  color: var(--muted);
  font-weight: 800;
}

.hexagram {
  display: grid;
  gap: 8px;
  min-height: 118px;
  padding: 0;
}

.line {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  align-items: center;
}

.line.broken {
  grid-template-columns: 1fr 28px 1fr;
}

.line.moving .bar {
  background: var(--red);
}

.line .gap {
  height: 16px;
}

.result-panel h2 {
  margin: 0;
  font-size: 24px;
}

.reading {
  margin-top: 18px;
  padding: 16px;
  background: #f0f6f3;
  border-left: 4px solid var(--accent);
  color: #31413f;
  line-height: 1.8;
}

.ai-panel {
  margin-top: 22px;
}

.server-key-note {
  margin: -6px 0 16px;
  color: var(--muted);
  line-height: 1.7;
}

.provider-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.provider-card {
  border: 1px solid var(--line);
  padding: 14px;
  background: #fff;
}

.provider-card label {
  display: flex;
  gap: 8px;
  align-items: center;
  font-weight: 800;
}

.provider-card input[type="checkbox"] {
  width: 18px;
  height: 18px;
}

.ai-results {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.ai-result {
  border: 1px solid var(--line);
  background: #fff;
  padding: 16px;
  line-height: 1.75;
}

.ai-result h3 {
  margin: 0 0 8px;
  color: var(--accent-dark);
}

.markdown-body p,
.markdown-body ul,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  margin: 0 0 10px;
}

.markdown-body ul {
  padding-left: 22px;
}

.markdown-body li + li {
  margin-top: 4px;
}

.markdown-body strong {
  color: var(--ink);
}

.markdown-body code {
  padding: 2px 5px;
  background: #edf4f1;
  border: 1px solid var(--line);
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.94em;
}

@media (max-width: 860px) {
  .workspace,
  .provider-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-bottom: 22px;
  }

}

@media (max-width: 520px) {
  .shell {
    width: min(100% - 20px, 1180px);
    padding-top: 14px;
  }

  .panel {
    padding: 16px;
  }

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

  .hero p {
    font-size: 16px;
  }
}