:root {
  --ink: #0c1218;
  --ink-soft: #152029;
  --mist: #9aadaf;
  --jade: #3d7a6a;
  --jade-bright: #5fa894;
  --gold: #c4a574;
  --gold-soft: #e2d0ad;
  --cinnabar: #a63d3d;
  --paper: #e8eef0;
  --line: rgba(196, 165, 116, 0.28);
  --font-display: "Noto Serif TC", "Source Serif 4", Georgia, serif;
  --font-body: "Source Serif 4", "Noto Serif TC", Georgia, serif;
  --radius: 2px;
  --max: 1080px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  background:
    radial-gradient(ellipse 90% 60% at 50% -10%, rgba(95, 168, 148, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 40% at 90% 20%, rgba(196, 165, 116, 0.12), transparent 50%),
    radial-gradient(ellipse 40% 50% at 10% 70%, rgba(61, 122, 106, 0.14), transparent 45%),
    linear-gradient(165deg, #070b10 0%, var(--ink) 45%, #101820 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
  z-index: 0;
}

a {
  color: var(--gold-soft);
}

.site-shell {
  position: relative;
  z-index: 1;
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 1.25rem 0 4rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0 1.5rem;
  animation: rise 0.9s ease both;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold-soft);
  line-height: 1.1;
}

.brand-sub {
  color: var(--mist);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
}

.icon-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(21, 32, 41, 0.7);
  color: var(--gold-soft);
  padding: 0.55rem 0.9rem;
  font: inherit;
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}

.icon-btn:hover {
  border-color: var(--gold);
  background: rgba(61, 122, 106, 0.2);
  transform: translateY(-1px);
}

.hero {
  padding: 2.5rem 0 2rem;
  min-height: min(72vh, 640px);
  display: grid;
  align-content: center;
  gap: 1.25rem;
  animation: rise 1s ease 0.1s both;
}

.hero h1 {
  margin: 0;
  max-width: 14ch;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.2rem, 7vw, 4.2rem);
  line-height: 1.15;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.hero p {
  margin: 0;
  max-width: 36rem;
  color: var(--mist);
  font-size: 1.08rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  font: inherit;
  letter-spacing: 0.08em;
  padding: 0.85rem 1.35rem;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.btn-primary {
  background: linear-gradient(120deg, var(--jade) 0%, #2f5f53 100%);
  color: var(--paper);
  animation: pulse-soft 3.6s ease-in-out infinite;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(61, 122, 106, 0.28);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--gold-soft);
}

.btn-ghost:hover {
  border-color: var(--gold);
}

.panel {
  margin-top: 1rem;
  padding: 1.75rem 0 0;
  border-top: 1px solid var(--line);
  animation: rise 0.8s ease both;
}

.panel h2 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.6rem, 3vw, 2rem);
  letter-spacing: 0.08em;
}

.panel .lede {
  margin: 0 0 1.5rem;
  color: var(--mist);
  max-width: 40rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field.full {
  grid-column: 1 / -1;
}

.field label {
  font-size: 0.88rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.field input,
.field select {
  appearance: none;
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(12, 18, 24, 0.65);
  color: var(--paper);
  font: inherit;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius);
}

.field input:focus,
.field select:focus {
  outline: 1px solid var(--jade-bright);
  border-color: var(--jade-bright);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  align-items: center;
}

.hint {
  color: var(--mist);
  font-size: 0.9rem;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 1.5rem 0;
}

.pillar {
  padding: 1.1rem 0.75rem;
  border-top: 1px solid var(--gold);
  background: linear-gradient(180deg, rgba(196, 165, 116, 0.08), transparent 70%);
  text-align: center;
  opacity: 0;
  transform: translateY(12px);
}

.pillar.is-in {
  animation: rise 0.7s ease forwards;
}

.pillar .title {
  color: var(--mist);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
}

.pillar .ganzhi {
  margin: 0.35rem 0;
  font-family: var(--font-display);
  font-size: 1.85rem;
  letter-spacing: 0.12em;
  color: var(--gold-soft);
}

.pillar .meta {
  color: var(--jade-bright);
  font-size: 0.86rem;
}

.stats {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.stat-block h3 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.1em;
  font-size: 1.15rem;
}

.bars {
  display: grid;
  gap: 0.55rem;
}

.bar-row {
  display: grid;
  grid-template-columns: 2rem 1fr 2.5rem;
  gap: 0.6rem;
  align-items: center;
  font-size: 0.92rem;
}

.bar-track {
  height: 0.35rem;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--jade), var(--gold));
  transition: width 1s ease;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  border: 1px solid var(--line);
  padding: 0.35rem 0.7rem;
  color: var(--gold-soft);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
}

.reading {
  display: grid;
  gap: 1.25rem;
}

.reading-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: baseline;
}

.badge {
  border: 1px solid var(--jade);
  color: var(--jade-bright);
  padding: 0.2rem 0.55rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.ai-loading {
  margin: 1rem 0 0.5rem;
  padding: 1.75rem 1.25rem;
  border: 1px dashed rgba(196, 165, 116, 0.35);
  background: rgba(21, 32, 41, 0.55);
  text-align: center;
}

.ai-loading[hidden] {
  display: none !important;
}

.ai-loading-orb {
  width: 2.4rem;
  height: 2.4rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  border: 2px solid rgba(196, 165, 116, 0.25);
  border-top-color: var(--gold-soft);
  border-right-color: var(--jade-bright);
  animation: spin 1.1s linear infinite;
}

.ai-loading-title {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  letter-spacing: 0.1em;
  color: var(--gold-soft);
  font-size: 1.15rem;
}

.ai-loading-hint {
  margin: 0;
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.6;
}

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

.section-block {
  padding: 0.25rem 0 0.5rem;
  border-left: 2px solid rgba(61, 122, 106, 0.55);
  padding-left: 1rem;
  opacity: 0;
  transform: translateY(10px);
}

.section-block.is-in {
  animation: rise 0.65s ease forwards;
}

.section-block h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
}

.section-block p,
.section-block pre {
  margin: 0;
  white-space: pre-wrap;
  color: var(--paper);
  font-family: inherit;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 12, 0.72);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 20;
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  width: min(100%, 420px);
  background: var(--ink-soft);
  border: 1px solid var(--line);
  padding: 1.4rem;
}

.modal h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  letter-spacing: 0.08em;
}

.modal p {
  margin: 0 0 1rem;
  color: var(--mist);
  font-size: 0.95rem;
}

.modal-actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 1rem;
}

.status {
  min-height: 1.4rem;
  margin-top: 0.75rem;
  color: var(--mist);
  font-size: 0.92rem;
}

.status.error {
  color: #e09a9a;
}

.footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 0.88rem;
  letter-spacing: 0.04em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.chat-panel {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.chat-head h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.1em;
  font-size: 1.25rem;
}

.chat-head .hint {
  margin: 0 0 1rem;
}

.chat-log {
  display: grid;
  gap: 1rem;
  overflow: visible;
  padding: 0.5rem 0.15rem 1.1rem;
  margin-bottom: 0.85rem;
}

.chat-empty {
  color: var(--mist);
  font-size: 0.95rem;
  padding: 0.75rem 0;
}

.chat-bubble {
  display: grid;
  gap: 0.45rem;
  width: min(100%, 40rem);
  padding: 1rem 1.1rem 1.05rem;
  border: 1px solid transparent;
}

.chat-bubble.is-user {
  justify-self: end;
  border-color: rgba(61, 122, 106, 0.55);
  background: linear-gradient(160deg, rgba(61, 122, 106, 0.28), rgba(21, 32, 41, 0.75));
  border-radius: 14px 14px 4px 14px;
}

.chat-bubble.is-ai {
  justify-self: start;
  border-color: rgba(196, 165, 116, 0.42);
  background: linear-gradient(160deg, rgba(196, 165, 116, 0.14), rgba(12, 18, 24, 0.72));
  border-radius: 14px 14px 14px 4px;
}

.chat-bubble.is-pending {
  opacity: 0.92;
}

.chat-pending-text {
  color: var(--mist) !important;
  letter-spacing: 0.08em;
  animation: pending-pulse 1.4s ease-in-out infinite;
}

@keyframes pending-pulse {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}

.chat-role {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  margin-bottom: 0;
}

.chat-bubble.is-user .chat-role {
  color: var(--jade-bright);
  justify-self: end;
}

.chat-bubble.is-ai .chat-role {
  color: var(--gold-soft);
}

.chat-role::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: currentColor;
}

.chat-bubble pre {
  margin: 0;
  white-space: pre-wrap;
  font-family: inherit;
  color: var(--paper);
  line-height: 1.7;
}

.chat-bubble.is-user pre {
  text-align: left;
}

.chat-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.85rem;
  align-items: end;
}

.chat-form textarea {
  width: 100%;
  resize: vertical;
  min-height: 7.5rem;
  border: 1px solid var(--line);
  background: rgba(12, 18, 24, 0.65);
  color: var(--paper);
  font: inherit;
  padding: 1rem 1.05rem;
  line-height: 1.65;
}

.chat-form textarea:focus {
  outline: 1px solid var(--jade-bright);
  border-color: var(--jade-bright);
}

@media (max-width: 560px) {
  .chat-form {
    grid-template-columns: 1fr;
  }
}

.moon {
  position: fixed;
  top: 12vh;
  right: 8vw;
  width: min(22vw, 180px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 35%, #f0e6d0 0%, #c4a574 35%, rgba(196, 165, 116, 0.15) 60%, transparent 70%);
  filter: blur(0.2px);
  opacity: 0.55;
  pointer-events: none;
  z-index: 0;
  animation: drift 12s ease-in-out infinite;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-soft {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(61, 122, 106, 0);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(61, 122, 106, 0.08);
  }
}

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

@media (max-width: 800px) {
  .form-grid,
  .stats,
  .chart-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .hero {
    min-height: auto;
    padding-top: 1.5rem;
  }

  .form-grid,
  .stats,
  .chart-grid {
    grid-template-columns: 1fr;
  }

  .moon {
    opacity: 0.28;
    right: -6vw;
  }
}