:root {
  --bg: #f4eee3;
  --paper: rgba(255, 251, 245, 0.85);
  --paper-strong: #fffaf2;
  --ink: #243033;
  --muted: #5f6a69;
  --line: rgba(36, 48, 51, 0.12);
  --accent: #9b5b2e;
  --accent-soft: rgba(155, 91, 46, 0.12);
  --accent-deep: #7f3c1a;
  --moss: #4d6650;
  --shadow: 0 24px 80px rgba(60, 45, 28, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 999px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Zen Kaku Gothic New", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(155, 91, 46, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(77, 102, 80, 0.12), transparent 24%),
    linear-gradient(180deg, #efe4d0 0%, var(--bg) 28%, #f7f1e8 100%);
  min-height: 100vh;
}

button,
input,
select {
  font: inherit;
}

.page-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0;
  padding: 32px 0 56px;
}

.site-layout {
  width: min(1480px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.side-nav {
  position: sticky;
  top: 24px;
  padding: 22px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 251, 245, 0.82);
  backdrop-filter: blur(10px);
}

.side-nav h2 {
  margin: 0;
  font-family: "Zen Old Mincho", serif;
}

.side-nav-links {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.side-link {
  display: block;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.68);
}

.side-link.is-current {
  background: var(--accent-soft);
  color: var(--accent-deep);
  border-color: rgba(155, 91, 46, 0.24);
}

.side-note {
  margin-top: 16px;
}

.hero {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, rgba(255, 250, 242, 0.94), rgba(250, 241, 231, 0.82)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180' viewBox='0 0 180 180'%3E%3Cg fill='none' stroke='%23c98757' stroke-opacity='.16'%3E%3Cpath d='M18 90c24-32 46-48 72-48s48 16 72 48'/%3E%3Cpath d='M18 108c24 20 46 30 72 30s48-10 72-30'/%3E%3C/g%3E%3C/svg%3E");
  box-shadow: var(--shadow);
}

.eyebrow,
.section-kicker {
  margin: 0 0 10px;
  color: var(--accent-deep);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.hero-copy h1,
.section-heading h2,
.detail-title {
  margin: 0;
  font-family: "Zen Old Mincho", serif;
  font-weight: 700;
}

.hero-copy h1 {
  font-size: clamp(2.2rem, 6vw, 4.4rem);
  line-height: 1.1;
}

.hero-lead {
  margin: 18px 0 0;
  max-width: 44rem;
  line-height: 1.9;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.primary-button,
.secondary-button,
.text-button,
.mini-chip,
.journey-button {
  border: 0;
  cursor: pointer;
  transition:
    transform 160ms ease,
    background-color 160ms ease,
    color 160ms ease,
    border-color 160ms ease;
}

.primary-button,
.secondary-button {
  padding: 12px 18px;
  border-radius: var(--radius-sm);
}

.primary-button {
  background: var(--accent);
  color: #fffaf5;
}

.secondary-button {
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink);
  border: 1px solid var(--line);
}

.primary-button:hover,
.secondary-button:hover,
.text-button:hover,
.mini-chip:hover,
.journey-button:hover,
.teaching-card:hover {
  transform: translateY(-1px);
}

.hero-card,
.panel {
  background: var(--paper);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.hero-card {
  padding: 24px;
}

.hero-card h2 {
  margin: 0 0 14px;
  font-size: 1.1rem;
}

.soft-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.8;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 20px;
  margin-top: 24px;
  align-items: start;
}

.controls-bar,
.sutra-flow-panel,
.journey-panel,
.source-panel {
  min-height: 100%;
}

.journey-panel {
  align-self: start;
}

.controls-bar,
.sutra-flow-panel,
.journey-panel,
.source-panel {
  grid-column: 1 / -1;
}

.list-panel {
  grid-column: 1 / 2;
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 28px);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
}

.detail-panel {
  grid-column: 2 / 3;
  grid-row: auto;
  align-self: start;
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 28px);
  overflow: hidden;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}

.panel {
  padding: 24px;
  min-width: 0;
}

.layout > * {
  min-width: 0;
}

.section-heading.split {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 0.92rem;
  color: var(--muted);
}

.field input,
.field select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
}

.controls-grid {
  display: grid;
  grid-template-columns: minmax(280px, 1.6fr) repeat(2, minmax(180px, 0.8fr));
  gap: 12px;
  align-items: end;
}

.tag-area {
  margin-top: 18px;
}

.inline-tags {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}

.inline-label {
  color: var(--muted);
  font-size: 0.92rem;
  padding-top: 8px;
}

.tag-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.text-button {
  padding: 0;
  background: transparent;
  color: var(--accent-deep);
}

.tag-cloud,
.active-filters,
.detail-tags,
.related-list,
.meta-list,
.model-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mini-chip,
.tag-chip,
.active-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.88rem;
}

.mini-chip,
.tag-chip {
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
}

.mini-chip.is-active,
.tag-chip.is-active {
  background: var(--accent-soft);
  color: var(--accent-deep);
  border-color: rgba(155, 91, 46, 0.24);
}

.active-chip {
  background: rgba(77, 102, 80, 0.1);
  color: var(--moss);
}

.journey-steps,
.sutra-flow {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 320px);
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 6px;
  scroll-snap-type: x proximity;
  overscroll-behavior-x: contain;
}

.journey-step,
.flow-card {
  position: relative;
  padding: 16px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid var(--line);
  border-radius: 16px;
  scroll-snap-align: start;
}

.journey-step::before {
  content: attr(data-step);
  position: absolute;
  top: 16px;
  right: 16px;
  font-family: "Zen Old Mincho", serif;
  color: rgba(127, 60, 26, 0.32);
  font-size: 1.8rem;
}

.flow-card::before {
  content: attr(data-step);
  position: absolute;
  top: 14px;
  right: 14px;
  color: rgba(127, 60, 26, 0.22);
  font-family: "Zen Old Mincho", serif;
  font-size: 2rem;
}

.journey-step h3,
.flow-card h3,
.teaching-card h3,
.related-card h4,
.model-block h3 {
  margin: 0;
}

.journey-step p,
.flow-card p,
.teaching-card p,
.detail-copy,
.note,
.model-block p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.journey-button {
  margin-top: 14px;
  background: transparent;
  color: var(--accent-deep);
  padding: 0;
}

.flow-segment {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(155, 91, 46, 0.08);
  color: var(--accent-deep);
  font-size: 0.86rem;
  line-height: 1.6;
}

.result-count {
  margin: 0;
  color: var(--muted);
}

.teaching-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 18px;
  overflow-y: auto;
  padding-right: 6px;
  align-content: start;
}

.teaching-card,
.related-card {
  border-radius: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.66);
}

.teaching-card {
  cursor: pointer;
  padding: 14px 16px;
}

.teaching-card.is-selected {
  border-color: rgba(155, 91, 46, 0.38);
  background: linear-gradient(180deg, rgba(255, 251, 245, 0.98), rgba(252, 242, 233, 0.92));
  box-shadow: 0 10px 30px rgba(155, 91, 46, 0.08);
}

.card-topline,
.detail-topline {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  font-size: 0.82rem;
  color: var(--accent-deep);
}

.teaching-card-body {
  display: grid;
  gap: 8px;
}

.teaching-card h3 {
  font-size: 1.35rem;
  line-height: 1.3;
}

.compact-tags {
  margin-top: 10px;
}

.detail-content {
  display: grid;
  gap: 18px;
  overflow-y: auto;
  padding-right: 6px;
  min-height: 0;
}

.detail-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.3;
}

.detail-navigation {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  margin-bottom: 6px;
}

.detail-navigation .note {
  margin: 0;
  text-align: center;
}

.detail-navigation .secondary-button[disabled] {
  opacity: 0.45;
  cursor: default;
  transform: none;
}

.detail-section {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.detail-section h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.meta-list {
  margin-top: 12px;
}

.meta-pill {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: rgba(77, 102, 80, 0.08);
  color: var(--moss);
  font-size: 0.88rem;
}

.related-list {
  margin-top: 12px;
}

.related-card {
  width: 100%;
}

.related-card button {
  margin-top: 12px;
}

.note {
  font-size: 0.92rem;
}

.source-details {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.52);
  padding: 16px 18px;
}

.source-details summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--accent-deep);
  list-style: none;
}

.source-details summary::-webkit-details-marker {
  display: none;
}

.source-details[open] summary {
  margin-bottom: 12px;
}

.source-blocks {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.single-layout {
  grid-template-columns: 1fr;
}

.source-page-panel {
  grid-column: 1 / -1;
}

.source-blocks-page {
  margin-top: 0;
}

.source-block {
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
}

.source-block h3 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--accent-deep);
}

.source-block p {
  margin: 8px 0 0;
  line-height: 1.9;
  color: var(--ink);
}

.model-grid {
  align-items: stretch;
}

.empty-state {
  padding: 28px;
  text-align: center;
  border-radius: 18px;
  border: 1px dashed rgba(36, 48, 51, 0.2);
  color: var(--muted);
}

@media (max-width: 1080px) {
  .site-layout {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: static;
  }

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

  .controls-bar,
  .sutra-flow-panel,
  .list-panel,
  .detail-panel {
    grid-column: auto;
    grid-row: auto;
    position: static;
    max-height: none;
  }

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

  .list-panel,
  .detail-panel {
    grid-column: auto;
  }

  .teaching-grid,
  .detail-content {
    overflow: visible;
    padding-right: 0;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 18px, 100%);
    padding-top: 18px;
  }

  .hero,
  .panel {
    padding: 18px;
  }

  .section-heading.split {
    grid-template-columns: 1fr;
    display: grid;
    align-items: start;
  }

  .detail-navigation {
    grid-template-columns: 1fr 1fr;
  }

  .detail-navigation .note {
    grid-column: 1 / -1;
    order: -1;
  }

  .inline-tags {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }
}