/* Palette from the project's star-icon set and app prototype (Claude Design files). */
:root {
  --color-paper: #f2ebdd;
  --color-surface: #fbf7ef;
  --color-ink: #1f1a16;
  --color-ink-muted: #5a4f44;
  --color-line: #d6c8ae;
  --color-lacquer: #8a2a1f;
  --color-gold: #c9973f;
  --color-metal: #9a7b2e;
  --color-wood: #3e7a4e;
  --color-water: #2c4a6b;
  --color-fire: #b8392b;
  --color-earth: #7a5230;
  --font-body: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Noto Serif', 'Iowan Old Style', Georgia, 'Times New Roman', serif;
  --gutter: clamp(16px, 5vw, 64px);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  /* Faint dotted grid like rice paper, so the page is not a flat fill. */
  background-image: radial-gradient(rgba(122, 82, 48, 0.09) 1px, transparent 1.4px);
  background-size: 22px 22px;
}

/* Five-element stripe in generating order: Mộc → Hỏa → Thổ → Kim → Thủy. */
body::before {
  content: '';
  display: block;
  height: 8px;
  background: linear-gradient(
    90deg,
    var(--color-wood) 0 20%,
    var(--color-fire) 20% 40%,
    var(--color-earth) 40% 60%,
    var(--color-metal) 60% 80%,
    var(--color-water) 80% 100%
  );
}

.topbar,
main,
.footer {
  width: min(1160px, 100%);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-lacquer);
}

/* Red seal (con dấu) instead of a pill badge. */
.seal {
  padding: 6px 10px;
  background: var(--color-lacquer);
  color: var(--color-surface);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  border: 1px solid var(--color-lacquer);
  outline: 1px solid var(--color-surface);
  outline-offset: -4px;
  transform: rotate(-2deg);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin: 0;
}

.hero {
  position: relative;
  display: grid;
  gap: 40px;
  align-items: center;
  padding-block: clamp(24px, 5vw, 56px) clamp(48px, 7vw, 88px);
}

@media (min-width: 920px) {
  .hero {
    grid-template-columns: 1fr 1fr;
  }
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-lacquer);
}

.hero h1 {
  font-size: clamp(40px, 6.5vw, 68px);
}

.lede {
  max-width: 30em;
  margin: 20px 0 0;
  color: var(--color-ink-muted);
}

.status {
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--color-lacquer);
}

.status strong {
  color: var(--color-lacquer);
}

.elements {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  font-weight: 600;
}

.elements li {
  padding: 6px 10px;
  background: var(--el);
  color: var(--color-surface);
  font-family: var(--font-display);
  font-weight: 700;
  outline: 1px solid var(--color-surface);
  outline-offset: -4px;
}

.elements li:nth-child(odd) {
  transform: rotate(-2deg);
}

.elements li:nth-child(even) {
  transform: rotate(1.5deg);
}

.cloud {
  position: absolute;
  z-index: -1;
  opacity: 0.18;
  pointer-events: none;
}

.cloud-a {
  top: 0;
  left: -40px;
  width: 200px;
  height: auto;
}

.cloud-b {
  right: 46%;
  bottom: 24px;
  width: 140px;
  height: auto;
  transform: scaleX(-1);
}

.el-metal {
  --el: var(--color-metal);
}
.el-wood {
  --el: var(--color-wood);
}
.el-water {
  --el: var(--color-water);
}
.el-fire {
  --el: var(--color-fire);
}
.el-earth {
  --el: var(--color-earth);
}

/* 12-palace board in the traditional square layout: Tỵ–Thân on top, Dần–Hợi at the bottom. */
.board-wrap {
  margin: 0;
}

/* Carved corner brackets; one SVG recoloured per element through a mask. */
.corner,
.card::before,
.card::after {
  position: absolute;
  width: 28px;
  height: 28px;
  background: var(--el, var(--color-lacquer));
  mask: url('/decor/goc.svg') no-repeat center / contain;
}

.board-frame {
  position: relative;
  width: min(548px, 100%);
  margin: 0 auto;
  padding: 14px;
}

.corner-tl {
  top: 0;
  left: 0;
}
.corner-tr {
  top: 0;
  right: 0;
  transform: scaleX(-1);
}
.corner-bl {
  bottom: 0;
  left: 0;
  transform: scaleY(-1);
}
.corner-br {
  bottom: 0;
  right: 0;
  transform: scale(-1);
}

.board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: repeat(4, minmax(0, 1fr));
  aspect-ratio: 1;
  width: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--color-surface);
  border: 2px solid var(--color-ink);
  outline: 1px solid var(--color-ink);
  outline-offset: 3px;
}

.palace {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
}

.branch {
  position: absolute;
  bottom: 4px;
  right: 6px;
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--color-ink-muted);
}

.stars {
  display: flex;
  gap: 2px;
}

.stars img {
  width: clamp(26px, 5.4vw, 56px);
  height: auto;
}

.empty {
  font-size: 11px;
  font-style: italic;
  color: var(--color-ink-muted);
  text-align: center;
  padding-inline: 4px;
}

.heaven {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin: 10%;
  border: 1px solid var(--color-lacquer);
  outline: 1px solid var(--color-lacquer);
  outline-offset: 4px;
}

.heaven-title {
  font-family: var(--font-display);
  font-size: clamp(18px, 3vw, 26px);
  font-weight: 700;
  color: var(--color-lacquer);
}

.heaven-sub {
  font-size: 13px;
  color: var(--color-ink-muted);
}

.board-wrap figcaption {
  margin-top: 14px;
  text-align: center;
  font-size: 13px;
  color: var(--color-ink-muted);
}

/* Hồi văn (key-fret) band between sections. */
.band {
  height: 24px;
  background: url('/decor/hoi-van.svg') repeat-x center / 24px 24px;
  opacity: 0.55;
}

.ornament {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 14px;
  vertical-align: 0.12em;
  background: var(--color-lacquer);
  transform: rotate(45deg);
  box-shadow:
    0 0 0 3px var(--color-paper),
    0 0 0 4px var(--color-lacquer);
}

.five,
.pillars,
.roadmap,
.privacy {
  padding-block: clamp(48px, 7vw, 80px);
}

h2 {
  font-size: clamp(26px, 3.4vw, 34px);
  margin-bottom: 28px;
}

.pillars ul,
.roadmap ol {
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 760px) {
  .pillars ul,
  .roadmap ol {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Double frame echoes the outer/inner strokes of the star icons. */
.card {
  position: relative;
  padding: 28px 24px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: 4px solid var(--el);
  box-shadow:
    inset 0 0 0 5px var(--color-surface),
    inset 0 0 0 6px var(--color-line);
}

.card::before {
  content: '';
  top: 8px;
  right: 8px;
  transform: scaleX(-1);
}

.card::after {
  content: '';
  bottom: 8px;
  left: 8px;
  transform: scaleY(-1);
}

.card img {
  display: block;
  width: 64px;
  height: 64px;
  margin-bottom: 12px;
}

.card h3 {
  font-size: 20px;
  margin: 4px 0 8px;
}

.card p,
.privacy p {
  margin: 0;
  color: var(--color-ink-muted);
}

.state {
  font-size: 13px;
  font-weight: 600;
  color: var(--el);
}

.roadmap .is-active {
  border-color: var(--color-earth);
}

.privacy {
  display: flex;
  gap: 24px;
  align-items: center;
}

.privacy img {
  flex: none;
}

.privacy h2 {
  margin-bottom: 10px;
}

@media (max-width: 600px) {
  .privacy {
    flex-direction: column;
    align-items: flex-start;
  }
}

.five {
  display: grid;
  gap: 32px;
  align-items: center;
}

@media (min-width: 860px) {
  .five {
    grid-template-columns: 1fr 1fr;
  }
}

.five p {
  max-width: 32em;
  margin: 0 0 14px;
  color: var(--color-ink-muted);
}

.five-art {
  margin: 0;
  display: flex;
  justify-content: center;
}

.nh-diagram {
  width: min(400px, 100%);
  height: auto;
}

.nh-orbit {
  fill: none;
  stroke: var(--color-line);
  stroke-dasharray: 2 6;
}

.nh-gen {
  fill: none;
  stroke-width: 3;
}
.nh-gen.nh-wood {
  stroke: var(--color-wood);
}
.nh-head-wood {
  fill: var(--color-wood);
}
.nh-gen.nh-fire {
  stroke: var(--color-fire);
}
.nh-head-fire {
  fill: var(--color-fire);
}
.nh-gen.nh-earth {
  stroke: var(--color-earth);
}
.nh-head-earth {
  fill: var(--color-earth);
}
.nh-gen.nh-metal {
  stroke: var(--color-metal);
}
.nh-head-metal {
  fill: var(--color-metal);
}
.nh-gen.nh-water {
  stroke: var(--color-water);
}
.nh-head-water {
  fill: var(--color-water);
}
.nh-ctl {
  stroke: var(--color-ink-muted);
  stroke-width: 1.2;
  stroke-dasharray: 5 4;
}

.nh-ctl-head {
  fill: var(--color-ink-muted);
}

.nh-node circle {
  fill: var(--el);
}

.nh-node .nh-ring {
  fill: none;
  stroke: var(--color-surface);
  stroke-width: 1.2;
}

.nh-node text {
  fill: var(--color-surface);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: central;
}

.footer {
  position: relative;
  padding-block: 28px 44px;
  border-top: 1px solid var(--color-line);
  font-size: 14px;
  color: var(--color-ink-muted);
}

.footer-cloud {
  position: absolute;
  right: var(--gutter);
  top: -52px;
  width: 120px;
  height: auto;
  opacity: 0.25;
}

.footer p {
  margin: 4px 0;
}

.notfound {
  padding-block: 20vh;
  text-align: center;
}

.notfound a {
  color: var(--color-lacquer);
}

.elements li span {
  display: block;
  font-size: 11px;
  font-weight: 600;
  opacity: 0.85;
}

.heaven-en {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-lacquer);
}

.engine,
.preview {
  padding-block: clamp(48px, 7vw, 80px);
}

.section-lede {
  max-width: 40em;
  margin: -12px 0 28px;
  color: var(--color-ink-muted);
}

.steps {
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 640px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.step-num {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--el);
  color: var(--color-surface);
  font-family: var(--font-display);
  font-weight: 700;
  outline: 1px solid var(--color-surface);
  outline-offset: -4px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

@media (min-width: 760px) {
  .stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stats li {
  padding: 18px 20px;
  background: var(--color-paper);
  font-size: 14px;
  color: var(--color-ink-muted);
}

.stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.1;
  color: var(--color-lacquer);
}

.phones {
  display: grid;
  gap: 28px;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 760px) {
  .phones {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
  }

  .phones li:nth-child(2) {
    transform: translateY(-24px);
  }
}

.phones li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  font-family: var(--font-display);
  font-weight: 700;
}

.phones img {
  width: min(300px, 100%);
  height: auto;
  border-radius: 40px;
  box-shadow:
    0 0 0 6px var(--color-surface),
    0 0 0 7px var(--color-line),
    0 18px 40px -18px rgba(31, 26, 22, 0.45);
}

/* Small screens: swipeable strip instead of three stacked phones. */
@media (max-width: 759px) {
  .phones {
    display: flex;
    gap: 20px;
    margin-inline: calc(-1 * var(--gutter));
    padding: 8px var(--gutter) 16px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .phones li {
    flex: 0 0 72%;
    scroll-snap-align: center;
  }
}

.footer a {
  color: var(--color-lacquer);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin: 24px 0 0;
}

.button,
.waitlist-form button,
.reading-actions button {
  display: inline-block;
  padding: 12px 20px;
  border: 0;
  background: var(--color-lacquer);
  color: var(--color-surface);
  font: 700 16px var(--font-body);
  text-decoration: none;
  cursor: pointer;
  outline: 1px solid var(--color-surface);
  outline-offset: -4px;
}

.button:hover,
.waitlist-form button:hover,
.reading-actions button:hover {
  background: #6f2118;
}

.reading-actions button:disabled {
  opacity: 0.6;
  cursor: progress;
}

.link {
  color: var(--color-lacquer);
  font-weight: 600;
}

.demo,
.waitlist,
.about {
  padding-block: clamp(48px, 7vw, 80px);
}

.demo-grid {
  display: grid;
  gap: 20px;
}

@media (min-width: 900px) {
  .demo-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.findings {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.findings .card {
  padding: 16px 20px;
}

.findings code {
  font-size: 12px;
  font-weight: 700;
  color: var(--el);
}

.findings p {
  margin: 4px 0 0;
}

.reading-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.reading-actions button + button {
  background: var(--color-water);
}

.reading-text {
  min-height: 7em;
  margin: 18px 0;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.65;
  color: var(--color-ink);
}

.reading-note {
  margin: 0;
  font-size: 13px;
  color: var(--color-ink-muted);
}

.waitlist-form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  max-width: 560px;
}

.waitlist-form input[type='email'] {
  flex: 1 1 240px;
  min-width: 0;
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  font: 16px var(--font-body);
  color: var(--color-ink);
}

.consent {
  flex-basis: 100%;
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--color-ink-muted);
}

.consent a {
  color: var(--color-lacquer);
}

.hp,
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.about p {
  max-width: 44em;
  margin: 0;
  color: var(--color-ink-muted);
}

a.brand {
  text-decoration: none;
}

.legal {
  max-width: 760px;
  padding-block: 24px 64px;
}

.legal h1 {
  font-size: clamp(32px, 5vw, 44px);
}

.legal h2 {
  font-size: 22px;
  margin: 32px 0 8px;
}

.legal p,
.legal li {
  color: var(--color-ink-muted);
}

.legal a {
  color: var(--color-lacquer);
}

.legal-date {
  margin-top: 8px;
  font-size: 14px;
}

/* Compact cards: keep only the top corner so the bracket never overlaps text. */
.findings .card::after {
  display: none;
}

.sample-note {
  margin: -16px 0 24px;
  font-size: 14px;
  color: var(--color-ink-muted);
}

.sample-note a {
  margin-left: 6px;
  color: var(--color-lacquer);
  font-weight: 600;
}

.reading-text {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
}

/* Board positions live here, not in style attributes: the CSP blocks inline styles. */
.at-1-1 {
  grid-area: 1 / 1;
}
.at-1-2 {
  grid-area: 1 / 2;
}
.at-1-3 {
  grid-area: 1 / 3;
}
.at-1-4 {
  grid-area: 1 / 4;
}
.at-2-1 {
  grid-area: 2 / 1;
}
.at-2-4 {
  grid-area: 2 / 4;
}
.at-3-1 {
  grid-area: 3 / 1;
}
.at-3-4 {
  grid-area: 3 / 4;
}
.at-4-1 {
  grid-area: 4 / 1;
}
.at-4-2 {
  grid-area: 4 / 2;
}
.at-4-3 {
  grid-area: 4 / 3;
}
.at-4-4 {
  grid-area: 4 / 4;
}
.heaven {
  grid-area: 2 / 2 / 4 / 4;
}