:root {
  --paper-bg: #f5ecd7;
  --paper-panel: #fffdf6;
  --ink: #1f1a17;
  --muted: #64584d;
  --accent: #d46a3f;
  --accent-soft: #f2c6a7;
  --line: #201a17;
  --sage: #9caf88;
  --gold: #efcf72;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "IBM Plex Sans", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(239, 207, 114, 0.22), transparent 24%),
    radial-gradient(circle at bottom right, rgba(156, 175, 136, 0.18), transparent 26%),
    linear-gradient(180deg, #f8f1e2 0%, var(--paper-bg) 100%);
}

h1,
h2,
h3,
h4,
.section-tag,
.site-kicker {
  font-family: "Special Elite", serif;
}

p,
li,
a,
button {
  font-size: 1rem;
}

.paper-band {
  height: 18px;
  width: 100%;
  background:
    repeating-linear-gradient(
      -45deg,
      var(--line),
      var(--line) 12px,
      var(--accent) 12px,
      var(--accent) 24px
    );
}

.paper-band-bottom {
  margin-top: 3rem;
}

.site-header {
  padding-top: 1.5rem;
}

.language-switcher {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.75rem;
  background: rgba(255, 253, 246, 0.92);
}

.language-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  margin: 0;
  background: #fff8ec;
  text-decoration: none;
}

.language-link.active {
  background: var(--accent);
  color: #fffaf1;
}

.site-kicker {
  margin: 0 0 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.brand-mark {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  font-family: "Special Elite", serif;
}

.site-version {
  margin: 0.2rem 0 0;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.split-nav {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.nav-brand {
  flex: 0 0 auto;
  min-width: 140px;
}

.nav-links {
  display: flex;
  flex: 1 1 580px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.7rem 1rem;
  margin: 0;
  padding: 0.35rem 0 0;
  list-style: none;
}

.nav-links li {
  margin: 0;
}

.nav-links a {
  display: inline-block;
  padding: 0.1rem 0;
  color: var(--ink);
  font-weight: 700;
  text-decoration-thickness: 2px;
  white-space: nowrap;
}

.hero {
  padding-top: 2rem;
}

.hero-card,
.note-card,
.info-card,
.principle-card,
.gate-banner,
.stage-card,
.summary-card {
  background: var(--paper-panel);
  min-width: 0;
}

.hero-card {
  position: relative;
  padding: 2rem;
  overflow: hidden;
}

.hero-card::after {
  content: "";
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 90px;
  height: 28px;
  background: rgba(212, 106, 63, 0.22);
  transform: rotate(8deg);
}

.hero-card h1,
.hero-card h2 {
  margin-top: 0.4rem;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1.06;
  overflow-wrap: anywhere;
  word-break: normal;
  hyphens: none;
  text-wrap: pretty;
  max-width: 14ch;
}

.hero-text {
  max-width: 48rem;
  font-size: 1.1rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.btn-secondary-outline {
  background: #fff7ea;
}

.note-card {
  padding: 1.6rem;
  transform: rotate(-1.2deg);
  background:
    linear-gradient(180deg, rgba(242, 198, 167, 0.35), transparent 30%),
    var(--paper-panel);
}

.note-card blockquote {
  margin: 0 0 1rem;
  padding-left: 1rem;
  border-left: 4px solid var(--accent);
  font-family: "Special Elite", serif;
  font-size: 1.15rem;
  line-height: 1.6;
}

.note-card p {
  font-family: "Special Elite", serif;
  line-height: 1.55;
}

.section-block {
  margin-top: 3rem;
}

.section-heading {
  margin-bottom: 1.25rem;
}

.section-tag {
  margin: 0 0 0.35rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  font-size: 0.9rem;
}

.section-heading h3,
.gate-banner h3 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

.section-heading h2,
.gate-banner h2,
.stage-card h2,
.stage-card h3,
.info-card h3,
.agent-card h3 {
  overflow-wrap: normal;
  word-break: normal;
  hyphens: none;
  text-wrap: pretty;
  min-width: 0;
}

.gate-banner h2 {
  font-size: clamp(1.7rem, 2.6vw, 2.8rem);
  line-height: 1.06;
  max-width: 100%;
  overflow-wrap: normal;
  text-wrap: balance;
}

.info-card,
.summary-card {
  height: 100%;
  padding: 1.4rem;
  min-width: 0;
}

.info-card h3,
.info-card h4,
.agent-card h3,
.stage-card h3,
.summary-card h3 {
  font-size: clamp(1.2rem, 1.7vw, 1.65rem);
  line-height: 1.08;
  max-width: 14ch;
}

.info-card h4,
.principle-card h4,
.stage-card h4 {
  margin-top: 0;
}

.accent-card {
  background:
    linear-gradient(180deg, rgba(239, 207, 114, 0.33), transparent 35%),
    var(--paper-panel);
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

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

.practice-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(360px, 1.1fr);
  gap: 1.25rem;
  align-items: start;
}

.operating-table-wrap {
  margin-top: 1.25rem;
  overflow-x: auto;
  background: var(--paper-panel);
}

.operating-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 860px;
}

.operating-table th,
.operating-table td {
  padding: 0.9rem 1rem;
  border: 1px solid rgba(31, 26, 23, 0.14);
  vertical-align: top;
  text-align: left;
}

.operating-table th {
  font-family: "Special Elite", serif;
  font-weight: 400;
  background: #fff8ec;
}

.operating-table td:first-child {
  font-weight: 700;
  white-space: nowrap;
}

.practice-card,
.loop-card {
  padding: 1.5rem;
  background: var(--paper-panel);
}

.practice-list {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.practice-list li + li {
  margin-top: 0.55rem;
}

.loop-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 610px;
  overflow: hidden;
}

.practice-flow {
  width: 100%;
  height: 560px;
  margin: 0 auto 0.85rem;
  border: 2px solid rgba(31, 26, 23, 0.14);
  border-radius: 18px;
  background:
    radial-gradient(circle at top left, rgba(239, 207, 114, 0.16), transparent 24%),
    linear-gradient(180deg, rgba(255, 253, 246, 0.98), rgba(255, 248, 236, 0.96));
}

.practice-flow .react-flow__renderer {
  background: transparent;
}

.practice-flow .react-flow__node {
  background: transparent;
  border: none;
  box-shadow: none;
  cursor: pointer;
}

.practice-flow .react-flow__attribution {
  display: none;
}

.practice-flow .react-flow__controls,
.practice-flow .react-flow__minimap {
  display: none;
}

.practice-flow .react-flow__handle {
  opacity: 0;
  width: 1px;
  height: 1px;
  border: 0;
  background: transparent;
}

.practice-flow .react-flow__edge-path {
  stroke-linecap: round;
}

.practice-flow .react-flow__edge.animated path {
  stroke-dasharray: 7 7;
  animation-duration: 1.8s;
}

.practice-flow .react-flow__edge[data-id^="e7-"] .react-flow__edge-path,
.practice-flow .react-flow__edge[data-id^="e7-"] .react-flow__edge-interaction {
  stroke-dasharray: 5 7;
}

.loop-node-card {
  min-width: 150px;
  padding: 0.65rem 0.8rem;
  border: 2px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 253, 246, 0.98);
  box-shadow: 3px 3px 0 rgba(31, 26, 23, 0.12);
  text-align: center;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.practice-flow .react-flow__node:hover .loop-node-card {
  transform: translateY(-2px);
  box-shadow: 4px 5px 0 rgba(31, 26, 23, 0.16);
}

.loop-node-card span {
  display: block;
  font-family: "Special Elite", serif;
  font-size: 0.82rem;
  color: var(--accent);
}

.loop-node-topline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  margin-bottom: 0.15rem;
}

.loop-human-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.38rem;
  height: 1.38rem;
  border: 2px solid var(--accent);
  border-radius: 999px;
  color: #fffdf6;
  background: var(--accent);
  box-shadow: 1px 1px 0 rgba(31, 26, 23, 0.12);
  flex: 0 0 auto;
  line-height: 0;
}

.loop-human-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.86rem;
  height: 0.86rem;
  display: block;
  transform: translate(-50%, -50%);
}

.loop-human-icon::before,
.loop-human-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  background: #fffdf6;
}

.loop-human-icon::before {
  top: 0.05rem;
  transform: translateX(-50%);
  width: 0.3rem;
  height: 0.3rem;
  border-radius: 999px;
}

.loop-human-icon::after {
  bottom: 0.08rem;
  transform: translateX(-50%);
  width: 0.62rem;
  height: 0.42rem;
  border-radius: 0.42rem 0.42rem 0.18rem 0.18rem;
}

.loop-legend {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  align-self: flex-start;
  padding: 0.4rem 0.7rem;
  border: 2px solid rgba(31, 26, 23, 0.14);
  border-radius: 999px;
  background: rgba(255, 248, 236, 0.92);
  font-size: 0.92rem;
  color: var(--muted);
}

.loop-human-badge-legend {
  width: 1.55rem;
  height: 1.55rem;
}

.loop-human-badge-legend .loop-human-icon {
  width: 0.96rem;
  height: 0.96rem;
}

.loop-node-card strong {
  display: block;
  font-size: 0.92rem;
  line-height: 1.15;
}

.loop-node-layer {
  padding: 0.7rem 0.9rem 0.62rem;
  background:
    linear-gradient(180deg, rgba(239, 207, 114, 0.18), rgba(255, 253, 246, 0.98) 42%),
    rgba(255, 253, 246, 0.98);
  border-style: dashed;
  box-shadow: 0 0 0 rgba(31, 26, 23, 0.08);
}

.loop-layer-note {
  display: block;
  margin-top: 0.22rem;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.2;
}

.principle-card {
  position: relative;
  padding: 1.6rem;
  min-height: 250px;
  min-width: 0;
}

.principle-card h3,
.principle-card h4 {
  font-family: "Special Elite", serif;
  font-size: clamp(1.2rem, 1.3vw, 1.75rem);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.1;
  overflow-wrap: anywhere;
  word-break: normal;
  hyphens: none;
  text-wrap: pretty;
  max-width: 11ch;
  margin-bottom: 1.1rem;
}

.principle-card p {
  overflow-wrap: anywhere;
  word-break: normal;
  hyphens: none;
}

.agent-card {
  position: relative;
  padding: 1.5rem;
  min-height: 100%;
  background: var(--paper-panel);
  min-width: 0;
}

.agent-label {
  display: inline-block;
  margin-bottom: 0.85rem;
  padding: 0.2rem 0.55rem;
  border: 2px solid var(--line);
  background: #fff8ec;
  font-family: "Special Elite", serif;
  font-size: 0.82rem;
}

.human-loop-inline {
  display: inline-block;
  margin-top: 0.55rem;
  padding: 0.18rem 0.45rem;
  border-left: 4px solid var(--accent);
  background: rgba(212, 106, 63, 0.08);
}

.agent-card h3 {
  margin-top: 0;
}

.agent-card p:last-child {
  margin-bottom: 0;
}

.principle-number {
  display: inline-block;
  margin-bottom: 1rem;
  font-family: "Special Elite", serif;
  font-size: 2rem;
  color: var(--accent);
}

.gate-banner {
  padding: 2rem;
  background:
    linear-gradient(90deg, rgba(156, 175, 136, 0.28), rgba(255, 253, 246, 0) 60%),
    var(--paper-panel);
}

.timeline {
  position: relative;
  display: grid;
  gap: 1rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 4px;
  background: var(--line);
  opacity: 0.2;
}

.stage-card {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1rem 1.2rem;
  margin-left: 0.2rem;
  min-width: 0;
}

.stage-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 2px solid var(--line);
  border-radius: 999px;
  background: #fff8ec;
  font-family: "Special Elite", serif;
  font-size: 1.05rem;
  z-index: 1;
}

.warm-card {
  background:
    linear-gradient(180deg, rgba(212, 106, 63, 0.16), transparent 40%),
    var(--paper-panel);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .practice-grid {
    grid-template-columns: 1fr;
  }

  .hero-card h1,
  .hero-card h2 {
    max-width: 100%;
  }

  .gate-banner h2,
  .info-card h3,
  .info-card h4,
  .agent-card h3,
  .stage-card h3 {
    max-width: 100%;
  }

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

  .site-footer {
    flex-direction: column;
  }

  .loop-card {
    min-height: 540px;
  }

  .practice-flow {
    height: 480px;
  }

  .loop-legend {
    font-size: 0.88rem;
  }
}

@media (max-width: 640px) {
  .loop-card {
    min-height: 440px;
    padding: 1rem;
  }

  .practice-flow {
    height: 390px;
  }

  .loop-node-card {
    min-width: 126px;
    padding: 0.55rem 0.7rem;
  }

  .loop-node-card strong {
    font-size: 0.84rem;
  }
}

@media (max-width: 640px) {
  .split-nav {
    gap: 1rem;
  }

  .nav-links {
    flex-basis: 100%;
    gap: 0.55rem 0.85rem;
    padding-top: 0;
  }

  .hero-card,
  .note-card,
  .gate-banner,
  .principle-card,
  .info-card,
  .summary-card {
    padding: 1.2rem;
  }

  .hero-card h2 {
    font-size: 2.2rem;
  }

  .hero-card h1,
  .hero-card h2 {
    font-size: 2.2rem;
    max-width: 100%;
  }

  .gate-banner h2 {
    font-size: 1.85rem;
    max-width: 100%;
    text-wrap: pretty;
  }

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

  .principle-card h3,
  .principle-card h4 {
    font-size: 1.6rem;
    max-width: 100%;
  }

  .nav-links {
    margin-top: 1rem;
    justify-content: flex-start;
  }

  .language-switcher {
    width: 100%;
  }

  .loop-card {
    min-height: auto;
  }

  .practice-flow {
    height: 440px;
  }

  .stage-card {
    grid-template-columns: 48px 1fr;
  }

  .timeline::before {
    left: 1rem;
  }
}