:root {
  --paper: #f7f1e8;
  --paper-strong: #fcfaf6;
  --ink: #10171c;
  --ink-soft: rgba(16, 23, 28, 0.72);
  --forest: #14352f;
  --forest-soft: #20594f;
  --sage: #8ca89b;
  --clay: #c15f4d;
  --gold: #d9b16c;
  --line: rgba(16, 23, 28, 0.12);
  --line-strong: rgba(16, 23, 28, 0.2);
  --card: rgba(252, 250, 246, 0.76);
  --card-strong: rgba(255, 255, 255, 0.92);
  --shadow: 0 28px 90px rgba(14, 27, 23, 0.12);
  --shadow-soft: 0 14px 42px rgba(14, 27, 23, 0.1);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --content-width: min(1120px, calc(100% - 40px));
  --font-display: "Iowan Old Style", "Palatino Linotype", "Songti SC", "STSong",
    serif;
  --font-body: "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC",
    sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

[id] {
  scroll-margin-top: 96px;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  background:
    radial-gradient(circle at top left, rgba(217, 177, 108, 0.16), transparent 34%),
    radial-gradient(circle at top right, rgba(20, 53, 47, 0.12), transparent 28%),
    linear-gradient(180deg, #f8f4ed 0%, #f2ece2 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(16, 23, 28, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 23, 28, 0.04) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.78), transparent 82%);
  pointer-events: none;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 20% 15%, rgba(255, 255, 255, 0.48), transparent 26%),
    radial-gradient(circle at 85% 8%, rgba(140, 168, 155, 0.2), transparent 18%);
  pointer-events: none;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
  background: none;
}

.page-shell {
  overflow: clip;
}

.section {
  padding: clamp(76px, 10vw, 132px) 0;
  position: relative;
}

.section-alt {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.32), rgba(255, 255, 255, 0.22)),
    rgba(255, 255, 255, 0.3);
  border-top: 1px solid rgba(255, 255, 255, 0.5);
  border-bottom: 1px solid rgba(16, 23, 28, 0.05);
}

.section-inner {
  width: var(--content-width);
  margin: 0 auto;
  position: relative;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(247, 241, 232, 0.82);
  border-bottom: 1px solid rgba(16, 23, 28, 0.08);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  box-shadow: 0 16px 28px rgba(20, 53, 47, 0.18);
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: -0.03em;
}

.brand-tag {
  font-size: 0.75rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 22px;
  color: var(--ink-soft);
}

.site-nav a {
  position: relative;
  padding: 6px 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--forest);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 260ms var(--ease-out);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--forest-soft);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero {
  padding-top: clamp(46px, 7vw, 86px);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  gap: clamp(40px, 6vw, 72px);
  align-items: center;
}

.hero-title,
.section-heading h2,
.manifesto-prefix,
.manifesto-suffix,
.rewrite-old,
.rewrite-new,
.download-copy h2 {
  font-family: var(--font-display);
}

.hero-title {
  margin: 0;
  font-size: clamp(3rem, 7vw, 5.8rem);
  line-height: 0.94;
  letter-spacing: -0.05em;
  max-width: 11ch;
}

.hero-title span {
  display: block;
  color: var(--forest);
  margin-top: 0.14em;
}

.hero-lead,
.section-lead {
  margin: 24px 0 0;
  max-width: 44rem;
  color: var(--ink-soft);
  font-size: clamp(1.04rem, 1.55vw, 1.16rem);
}

.hero-actions,
.download-panel {
  display: flex;
  flex-direction: column;
}

.hero-actions {
  margin-top: 34px;
  gap: 14px;
  align-items: flex-start;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  transition:
    transform 260ms var(--ease-out),
    background-color 260ms var(--ease-out),
    border-color 260ms var(--ease-out),
    box-shadow 260ms var(--ease-out);
  font-weight: 600;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(20, 53, 47, 0.12);
}

.button:focus-visible,
.scenario-tab:focus-visible,
.faq-item summary:focus-visible {
  outline: 2px solid rgba(32, 89, 79, 0.7);
  outline-offset: 3px;
}

.button-primary {
  background: var(--forest);
  border-color: var(--forest);
  color: #f8f5f0;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #194239;
}

.button-secondary,
.button-ghost {
  background: rgba(255, 255, 255, 0.5);
}

.button-large {
  min-height: 58px;
  width: 100%;
}

.header-button {
  white-space: nowrap;
}

.hero-points,
.download-points,
.scenario-points {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-points li,
.download-points li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(16, 23, 28, 0.08);
  box-shadow: 0 14px 32px rgba(16, 23, 28, 0.06);
}

.hero-points li::before,
.download-points li::before,
.scenario-points li::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--gold), var(--clay));
}

.hero-visual {
  position: relative;
}

.product-shell {
  position: relative;
  padding: 42px 28px 34px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.42)),
    radial-gradient(circle at top right, rgba(217, 177, 108, 0.18), transparent 34%);
  border: 1px solid rgba(16, 23, 28, 0.08);
  box-shadow: var(--shadow);
}

.product-shell::before,
.product-shell::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  z-index: -1;
  filter: blur(16px);
  opacity: 0.7;
}

.product-shell::before {
  width: 150px;
  height: 150px;
  right: -40px;
  top: -20px;
  background: rgba(32, 89, 79, 0.16);
}

.product-shell::after {
  width: 120px;
  height: 120px;
  left: -26px;
  bottom: -18px;
  background: rgba(193, 95, 77, 0.16);
}

.product-window {
  border-radius: 28px;
  overflow: hidden;
  background: rgba(252, 250, 246, 0.95);
  border: 1px solid rgba(16, 23, 28, 0.08);
  box-shadow: 0 16px 38px rgba(16, 23, 28, 0.08);
}

.window-toolbar {
  display: inline-flex;
  gap: 8px;
  padding: 16px 18px 0;
}

.window-toolbar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(16, 23, 28, 0.22);
}

.window-toolbar span:first-child {
  background: rgba(193, 95, 77, 0.8);
}

.window-toolbar span:nth-child(2) {
  background: rgba(217, 177, 108, 0.88);
}

.window-toolbar span:nth-child(3) {
  background: rgba(32, 89, 79, 0.72);
}

.window-body {
  padding: 22px 20px 22px;
}

.mock-topbar,
.metric-row,
.timeline-bars,
.principles-grid,
.risk-grid,
.research-grid,
.feature-grid,
.footer-inner,
.download-layout,
.scenario-layout,
.download-meta {
  display: grid;
}

.mock-topbar {
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
}

.mock-label,
.metric-title,
.intervention-tag,
.risk-index,
.feature-tag,
.scenario-kicker,
.download-state,
.footer-line,
.principle-index,
.mechanism-index {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 700;
}

.mock-label,
.metric-title,
.feature-tag,
.scenario-kicker,
.footer-line,
.principle-index,
.mechanism-index {
  color: var(--ink-soft);
}

.mock-value,
.metric-number {
  margin: 6px 0 0;
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -0.05em;
  font-family: var(--font-display);
}

.mock-badge {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(20, 53, 47, 0.08);
  color: var(--forest);
  font-weight: 600;
}

.metric-row {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.metric-card,
.intervention-card,
.timeline-card,
.principle-card,
.risk-card,
.research-card,
.feature-card,
.mechanism-step,
.scenario-panel,
.download-panel,
.faq-item {
  background: var(--card);
  border: 1px solid rgba(16, 23, 28, 0.08);
  box-shadow: var(--shadow-soft);
}

.metric-card,
.timeline-card {
  padding: 18px;
  border-radius: var(--radius-md);
}

.metric-detail,
.download-note {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.intervention-card {
  margin-top: 16px;
  padding: 22px;
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(20, 53, 47, 0.94), rgba(18, 43, 39, 0.94)),
    var(--forest);
  color: #f7f4ef;
}

.intervention-card h2 {
  margin: 10px 0 12px;
  font-size: clamp(1.65rem, 2.5vw, 2.1rem);
  line-height: 1.1;
  font-family: var(--font-display);
}

.intervention-card p:last-of-type {
  margin-bottom: 0;
  color: rgba(247, 244, 239, 0.8);
}

.micro-tasks {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
  list-style: none;
  padding: 0;
}

.micro-tasks li {
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(247, 244, 239, 0.12);
  border: 1px solid rgba(247, 244, 239, 0.16);
}

.timeline-card {
  margin-top: 16px;
}

.timeline-bars {
  grid-template-columns: 2.6fr 1.1fr 2fr 0.8fr 2.8fr;
  gap: 8px;
  margin: 14px 0 12px;
}

.bar {
  height: 16px;
  border-radius: 999px;
  background: rgba(16, 23, 28, 0.12);
}

.bar.focus {
  background: linear-gradient(90deg, rgba(32, 89, 79, 0.38), rgba(32, 89, 79, 0.82));
}

.bar.ai {
  background: linear-gradient(90deg, rgba(193, 95, 77, 0.34), rgba(193, 95, 77, 0.78));
}

.bar.review {
  background: linear-gradient(90deg, rgba(217, 177, 108, 0.4), rgba(217, 177, 108, 0.92));
}

.floating-chip {
  position: absolute;
  max-width: 210px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(16, 23, 28, 0.08);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 4px;
  backdrop-filter: blur(14px);
  animation: drift 7s ease-in-out infinite;
}

.floating-chip strong {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--forest-soft);
}

.floating-chip span {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.chip-left {
  left: -26px;
  bottom: 54px;
}

.chip-right {
  right: -22px;
  top: 40px;
  animation-delay: -2.6s;
}

.section-heading {
  max-width: 48rem;
}

.section-heading h2,
.download-copy h2 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.manifesto-card {
  margin-top: 34px;
  padding: clamp(28px, 4vw, 42px);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.66), rgba(255, 255, 255, 0.5)),
    var(--paper-strong);
  border: 1px solid rgba(16, 23, 28, 0.08);
  box-shadow: var(--shadow);
}

.manifesto-copy {
  display: grid;
  gap: 14px;
}

.manifesto-prefix,
.manifesto-suffix {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.rewrite-cluster {
  position: relative;
  display: grid;
  gap: 14px;
  width: fit-content;
  align-items: start;
}

.rewrite-old,
.rewrite-new {
  font-size: clamp(2.2rem, 5vw, 4.15rem);
  line-height: 0.96;
  letter-spacing: -0.06em;
}

.rewrite-old {
  color: rgba(16, 23, 28, 0.8);
}

.rewrite-new {
  color: var(--forest);
  opacity: 0;
  transform: translateY(18px);
}

.rewrite-strike {
  position: absolute;
  left: -2%;
  right: -2%;
  top: 23%;
  height: 4px;
  border-radius: 999px;
  background:
    linear-gradient(90deg, transparent 0%, rgba(193, 95, 77, 0.9) 8%, rgba(193, 95, 77, 0.9) 92%, transparent 100%);
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
}

.rewrite-cluster.is-animated .rewrite-strike {
  animation: strike 1400ms var(--ease-out) 480ms forwards;
}

.rewrite-cluster.is-animated .rewrite-old {
  animation: oldFade 700ms ease 1560ms forwards;
}

.rewrite-cluster.is-animated .rewrite-new {
  animation: rewriteIn 1050ms var(--ease-out) 1740ms forwards;
}

.principles-grid {
  margin-top: 34px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.principle-card,
.risk-card,
.research-card,
.feature-card,
.mechanism-step,
.scenario-panel,
.download-panel {
  padding: 24px;
  border-radius: 24px;
}

.principle-card h3,
.risk-card h3,
.research-card h3,
.feature-card h3,
.mechanism-step h3,
.scenario-panel h3 {
  margin: 10px 0 10px;
  font-size: 1.4rem;
  line-height: 1.15;
}

.principle-card p:last-child,
.risk-card p:last-child,
.feature-card p:last-child,
.mechanism-step p:last-child,
.scenario-panel p:nth-child(3) {
  margin: 0;
  color: var(--ink-soft);
}

.risk-grid,
.research-grid,
.feature-grid {
  gap: 18px;
  margin-top: 34px;
}

.risk-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.research-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.research-card {
  min-height: 100%;
}

.research-paper,
.research-meta,
.research-summary,
.research-quote {
  margin: 0;
}

.research-paper {
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.45;
}

.research-paper a {
  color: var(--forest);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

.research-paper a:hover,
.research-paper a:focus-visible {
  color: var(--forest-soft);
}

.research-meta {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 0.84rem;
  letter-spacing: 0.04em;
}

.research-quote {
  margin-top: 16px;
  padding: 18px 20px;
  border-left: 2px solid rgba(20, 53, 47, 0.4);
  background: rgba(255, 255, 255, 0.56);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.7;
}

.research-summary {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(16, 23, 28, 0.08);
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.boundary-note {
  margin-top: 22px;
  padding: 18px 20px;
  border-left: 3px solid var(--forest);
  background: rgba(255, 255, 255, 0.56);
  color: var(--ink-soft);
  border-radius: 0 18px 18px 0;
}

.mechanism-track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 38px;
  align-items: start;
}

.track-line {
  position: absolute;
  left: 10%;
  right: 10%;
  top: 52px;
  height: 2px;
  background: linear-gradient(90deg, rgba(193, 95, 77, 0.22), rgba(20, 53, 47, 0.48));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 900ms var(--ease-out);
}

.mechanism-track.is-visible .track-line {
  transform: scaleX(1);
}

.mechanism-step {
  position: relative;
}

.mechanism-index {
  color: var(--forest-soft);
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card-large {
  grid-column: span 2;
  min-height: 100%;
  background:
    linear-gradient(135deg, rgba(20, 53, 47, 0.96), rgba(18, 43, 39, 0.92)),
    var(--forest);
  color: #f7f4ef;
}

.feature-card-large .feature-tag,
.feature-card-large p:last-child {
  color: rgba(247, 244, 239, 0.76);
}

.feature-card {
  transition:
    transform 300ms var(--ease-out),
    border-color 300ms var(--ease-out),
    box-shadow 300ms var(--ease-out);
}

.feature-card:hover,
.feature-card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(20, 53, 47, 0.16);
  box-shadow: 0 22px 46px rgba(14, 27, 23, 0.12);
}

.scenario-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 24px;
  margin-top: 34px;
}

.scenario-tabs {
  gap: 12px;
  align-content: start;
}

.scenario-tab {
  width: 100%;
  padding: 20px;
  text-align: left;
  border-radius: 20px;
  border: 1px solid rgba(16, 23, 28, 0.08);
  background: rgba(255, 255, 255, 0.54);
  color: var(--ink);
  box-shadow: 0 10px 28px rgba(16, 23, 28, 0.06);
  transition:
    transform 260ms var(--ease-out),
    background-color 260ms var(--ease-out),
    border-color 260ms var(--ease-out),
    color 260ms var(--ease-out);
}

.scenario-tab:hover,
.scenario-tab:focus-visible {
  transform: translateX(4px);
}

.scenario-tab[aria-selected="true"] {
  background: linear-gradient(135deg, rgba(20, 53, 47, 0.96), rgba(18, 43, 39, 0.92));
  color: #f7f4ef;
  border-color: rgba(20, 53, 47, 0.9);
}

.scenario-tab[aria-selected="true"] .scenario-hint {
  color: rgba(247, 244, 239, 0.72);
}

.scenario-label {
  display: block;
  font-size: 1.12rem;
  font-weight: 700;
}

.scenario-hint {
  display: block;
  margin-top: 6px;
  color: var(--ink-soft);
}

.scenario-panels {
  position: relative;
}

.scenario-panel {
  animation: panelIn 420ms var(--ease-out);
}

.scenario-points {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.scenario-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--ink-soft);
}

.download-section {
  background:
    linear-gradient(135deg, rgba(20, 53, 47, 0.95), rgba(17, 40, 36, 0.98)),
    var(--forest);
  color: #f8f5f0;
}

.download-layout {
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 28px;
  align-items: center;
}

.download-copy .eyebrow,
.download-copy .section-lead,
.download-note,
.download-meta dt {
  color: rgba(248, 245, 240, 0.7);
}

.download-copy .hero-points li,
.download-points li {
  background: rgba(248, 245, 240, 0.08);
  border-color: rgba(248, 245, 240, 0.14);
  box-shadow: none;
}

.download-panel {
  gap: 16px;
  padding: 28px;
  border: 1px solid rgba(248, 245, 240, 0.14);
  background: rgba(248, 245, 240, 0.08);
  box-shadow: none;
}

.download-state {
  color: rgba(217, 177, 108, 0.92);
}

.download-meta {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 6px 0 0;
}

.download-meta div {
  padding-top: 14px;
  border-top: 1px solid rgba(248, 245, 240, 0.14);
}

.download-meta dt,
.download-meta dd {
  margin: 0;
}

.download-meta dd {
  margin-top: 4px;
  font-size: 1rem;
}

.faq-list {
  margin-top: 30px;
  display: grid;
  gap: 12px;
}

.faq-item {
  padding: 0;
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  padding: 22px 24px;
  font-weight: 700;
  cursor: pointer;
  position: relative;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  color: var(--forest);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin: 0;
  padding: 0 24px 24px;
  color: var(--ink-soft);
}

.site-footer {
  padding: 26px 0 44px;
}

.footer-inner {
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  border-top: 1px solid rgba(16, 23, 28, 0.08);
  padding-top: 20px;
}

.footer-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.4rem;
}

.footer-line {
  margin-top: 4px;
}

.footer-links {
  display: inline-flex;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--ink-soft);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--forest);
}

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  max-width: min(360px, calc(100vw - 32px));
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(20, 53, 47, 0.96);
  color: #f8f5f0;
  box-shadow: 0 18px 44px rgba(16, 23, 28, 0.22);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition:
    opacity 240ms ease,
    transform 240ms ease;
  z-index: 30;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 680ms var(--ease-out),
    transform 680ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@keyframes strike {
  from {
    opacity: 0;
    transform: scaleX(0);
  }

  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

@keyframes rewriteIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes oldFade {
  from {
    opacity: 1;
  }

  to {
    opacity: 0.34;
  }
}

@keyframes drift {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

@keyframes panelIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1040px) {
  .site-nav {
    display: none;
  }

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

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-card-large {
    grid-column: span 2;
  }
}

@media (max-width: 820px) {
  .header-inner {
    min-height: 72px;
  }

  .header-button {
    display: none;
  }

  .hero-title,
  .section-heading h2,
  .download-copy h2 {
    max-width: none;
  }

  .principles-grid,
  .risk-grid,
  .research-grid,
  .feature-grid,
  .metric-row,
  .download-meta {
    grid-template-columns: 1fr;
  }

  .feature-card-large {
    grid-column: auto;
  }

  .mechanism-track {
    grid-template-columns: 1fr;
  }

  .track-line {
    left: 24px;
    right: auto;
    top: 48px;
    bottom: 48px;
    width: 2px;
    height: auto;
    transform: scaleY(0);
    transform-origin: top center;
  }

  .mechanism-track.is-visible .track-line {
    transform: scaleY(1);
  }

  .floating-chip {
    position: static;
    max-width: none;
    margin-top: 16px;
  }

  .product-shell {
    padding: 18px;
  }
}

@media (max-width: 620px) {
  :root {
    --content-width: min(100% - 28px, 100%);
  }

  .section {
    padding: 68px 0;
  }

  .hero-actions {
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .hero-points,
  .download-points {
    flex-direction: column;
  }

  .hero-points li,
  .download-points li {
    width: 100%;
    justify-content: flex-start;
  }

  .manifesto-card,
  .product-shell,
  .principle-card,
  .risk-card,
  .research-card,
  .feature-card,
  .mechanism-step,
  .scenario-panel,
  .download-panel {
    border-radius: 22px;
  }

  .manifesto-prefix,
  .manifesto-suffix {
    font-size: clamp(1.8rem, 7vw, 2.4rem);
  }

  .rewrite-old,
  .rewrite-new {
    font-size: clamp(2rem, 8vw, 2.8rem);
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .rewrite-new {
    opacity: 1;
    transform: none;
  }

  .rewrite-strike {
    opacity: 1;
    transform: scaleX(1);
  }
}