@import url("https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:wght@600;700;800&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap");

:root {
  --bg: #09121f;
  --bg-alt: #101d31;
  --panel: rgba(12, 22, 38, 0.86);
  --panel-strong: rgba(18, 31, 51, 0.96);
  --line: rgba(189, 209, 234, 0.18);
  --line-strong: rgba(189, 209, 234, 0.35);
  --text: #f6fbff;
  --muted: #a7bbcf;
  --accent: #57dbc5;
  --accent-2: #82a7ff;
  --accent-3: #ffd47d;
  --danger: #ff8f8a;
  --ok: #8ef0b0;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(circle at top left, rgba(87, 219, 197, 0.16), transparent 34%),
    radial-gradient(circle at top right, rgba(130, 167, 255, 0.18), transparent 30%),
    linear-gradient(160deg, #060d17 0%, #0d1827 52%, #0f2138 100%);
  color: var(--text);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

.slide-shell {
  position: relative;
  width: 1600px;
  min-height: 900px;
  margin: 0 auto;
  padding: 52px;
  overflow: hidden;
}

.slide-shell::before,
.slide-shell::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(10px);
  pointer-events: none;
}

.slide-shell::before {
  top: -80px;
  right: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(87, 219, 197, 0.24), transparent 70%);
}

.slide-shell::after {
  left: -110px;
  bottom: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(130, 167, 255, 0.18), transparent 72%);
}

.frame {
  position: relative;
  z-index: 1;
  min-height: 796px;
  padding: 28px 32px 26px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 18%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.01), rgba(255, 255, 255, 0.02)),
    var(--panel);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 24px;
}

.topbar,
.bottombar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(87, 219, 197, 0.12);
}

.course-chip,
.page-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
}

.hero {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 28px;
  align-items: stretch;
}

.hero-title,
.section-title {
  margin: 0;
  font-family: "Bricolage Grotesque", system-ui, sans-serif;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.hero-title {
  font-size: 74px;
  line-height: 0.98;
}

.section-title {
  font-size: 46px;
  line-height: 1;
}

.lead,
.body-copy {
  color: var(--muted);
}

.lead {
  margin: 18px 0 0;
  max-width: 24ch;
  font-size: 26px;
  line-height: 1.34;
}

.body-copy {
  margin: 0;
  font-size: 21px;
  line-height: 1.45;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 18px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.panel,
.metric,
.lane,
.list-card,
.quote-card,
.timeline-card,
.compare-card,
.formula-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel-strong);
}

.panel,
.lane,
.list-card,
.quote-card,
.timeline-card,
.compare-card,
.formula-card {
  padding: 22px;
}

.metric {
  padding: 20px 22px;
}

.panel-title,
.lane-title,
.metric-label,
.small-title {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.metric-value {
  margin: 10px 0 6px;
  font-family: "Bricolage Grotesque", system-ui, sans-serif;
  font-size: 42px;
  line-height: 1;
  letter-spacing: -0.04em;
}

.pill-row,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill,
.tag {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 15px;
  line-height: 1;
}

.pill {
  border: 1px solid rgba(87, 219, 197, 0.24);
  background: rgba(87, 219, 197, 0.12);
  color: var(--text);
}

.tag {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
}

.bullet-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.bullet-list li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 12px;
  align-items: start;
  font-size: 21px;
  line-height: 1.4;
}

.bullet-list li::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-top: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.process {
  display: flex;
  gap: 12px;
  align-items: stretch;
}

.process-step {
  flex: 1;
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.04);
}

.process-step strong,
.compare-card strong,
.quote-card strong {
  display: block;
  font-size: 20px;
  margin-bottom: 8px;
}

.process-arrow {
  width: 42px;
  display: grid;
  place-items: center;
  color: var(--accent);
  font-size: 28px;
}

.stack-bars {
  display: grid;
  gap: 16px;
}

.bar-row {
  display: grid;
  grid-template-columns: 190px 1fr 120px;
  gap: 16px;
  align-items: center;
  font-size: 18px;
}

.bar-track {
  height: 18px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
}

.bar-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.bar-fill.alt {
  background: linear-gradient(90deg, var(--accent-3), #ff9a6a);
}

.bar-fill.danger {
  background: linear-gradient(90deg, var(--danger), #ffb29f);
}

.bar-value {
  text-align: right;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 15px;
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.compare-head {
  margin: 0 0 14px;
  font-size: 18px;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.equation {
  display: grid;
  grid-template-columns: auto auto auto;
  gap: 14px;
  align-items: center;
  justify-content: start;
}

.equation .big {
  font-family: "Bricolage Grotesque", system-ui, sans-serif;
  font-size: 54px;
  letter-spacing: -0.05em;
}

.equation .small {
  color: var(--muted);
  font-size: 20px;
}

.timeline {
  display: grid;
  gap: 14px;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  padding-left: 42px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(87, 219, 197, 0.12);
}

.timeline-time {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  color: var(--accent-3);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-copy {
  margin-top: 4px;
  font-size: 19px;
  color: var(--text);
}

.quote-card blockquote {
  margin: 0;
  font-family: "Bricolage Grotesque", system-ui, sans-serif;
  font-size: 34px;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.quote-card p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.matrix {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.matrix-card {
  padding: 20px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.matrix-card.ok {
  border-color: rgba(142, 240, 176, 0.35);
}

.matrix-card.warn {
  border-color: rgba(255, 212, 125, 0.35);
}

.matrix-card.danger {
  border-color: rgba(255, 143, 138, 0.35);
}

.matrix-card h3,
.mini-chart h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.matrix-card p,
.mini-chart p {
  margin: 0;
  font-size: 18px;
  line-height: 1.42;
  color: var(--muted);
}

.mini-chart {
  padding: 22px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.rings {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: center;
}

.ring {
  width: 170px;
  height: 170px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at center, rgba(9, 18, 31, 0.92) 54%, transparent 55%),
    conic-gradient(var(--accent) 0 76%, rgba(255, 255, 255, 0.08) 76% 100%);
}

.ring.alt {
  background:
    radial-gradient(circle at center, rgba(9, 18, 31, 0.92) 54%, transparent 55%),
    conic-gradient(var(--accent-2) 0 91%, rgba(255, 255, 255, 0.08) 91% 100%);
}

.ring span {
  font-family: "Bricolage Grotesque", system-ui, sans-serif;
  font-size: 34px;
  letter-spacing: -0.04em;
}

.ring small {
  display: block;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.deck-nav {
  display: flex;
  align-items: center;
  gap: 12px;
}

.deck-nav a {
  text-decoration: none;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 46px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 14px;
}

.nav-btn:focus-visible {
  outline: 2px solid rgba(130, 167, 255, 0.9);
  outline-offset: 3px;
}

.nav-btn.primary {
  border-color: rgba(87, 219, 197, 0.36);
  background: rgba(87, 219, 197, 0.14);
}

.accent-text {
  color: var(--accent);
}

.accent-2-text {
  color: var(--accent-2);
}

.accent-3-text {
  color: var(--accent-3);
}

.danger-text {
  color: var(--danger);
}

.ok-text {
  color: var(--ok);
}

.full-height {
  height: 100%;
}

.center {
  display: grid;
  place-items: center;
}

@media (prefers-reduced-motion: no-preference) {
  .frame {
    animation: deck-fade 420ms ease-out;
  }
}

@keyframes deck-fade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}