/*
 * Dibs web fallback styles (DESIGN_SYSTEM.md, D111). Dark-first, mobile
 * first. The custom properties copy src/theme; a test keeps them in step.
 */

:root {
  --color-background: #0a1222;
  --color-surface: #0f1a2e;
  --color-surface-raised: #16243d;
  --color-border: #1f3050;
  --color-border-strong: #2a3d60;
  --color-text-primary: #f3f5f9;
  --color-text-secondary: #aeb8cb;
  --color-text-muted: #76829a;
  --color-accent: #cfe84a;
  --color-on-accent: #0a1222;
  --color-danger: #f06a6a;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-xxl: 32px;
  --space-xxxl: 48px;

  --radius-control: 10px;
  --radius-card: 14px;
  --radius-sheet: 20px;
  --radius-pill: 999px;

  /* Translucent accent and navy for the landing page's glow and depth. */
  --color-accent-soft: rgba(207, 232, 74, 0.12);
  --color-accent-faint: rgba(207, 232, 74, 0.06);
  --color-shadow: rgba(2, 6, 16, 0.55);

  --font-title: 700 28px/34px var(--font-family);
  --font-heading: 600 20px/26px var(--font-family);
  --font-body: 400 16px/22px var(--font-family);
  --font-label: 600 14px/18px var(--font-family);
  --font-caption: 400 12px/16px var(--font-family);
  --font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  color-scheme: dark;
}

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

html,
body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text-primary);
  font: var(--font-body);
  -webkit-text-size-adjust: 100%;
}

.page {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  max-width: 480px;
  min-height: 100vh;
  margin: 0 auto;
  padding: var(--space-xxl) var(--space-lg)
    calc(var(--space-xxl) + env(safe-area-inset-bottom, 0px));
}

.wordmark {
  display: block;
  width: 160px;
  height: auto;
}

.title {
  margin: 0;
  font: var(--font-title);
  letter-spacing: -0.3px;
}

.kicker,
.status {
  margin: 0;
  font: var(--font-label);
  color: var(--color-accent);
}

.body,
.loading {
  margin: 0;
  color: var(--color-text-secondary);
}

.note {
  margin: 0;
  font: var(--font-caption);
  color: var(--color-text-muted);
}

.message {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.card {
  margin: 0;
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.side-label {
  margin: 0;
  font: var(--font-caption);
  font-weight: 600;
  color: var(--color-text-muted);
}

.side-name,
.code-value {
  margin: var(--space-xs) 0;
  font: var(--font-heading);
}

.code-value {
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
}

.players {
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--color-text-secondary);
}

.vs {
  margin: 0;
  text-align: center;
  font: var(--font-label);
  color: var(--color-text-muted);
}

.times {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.times dt {
  font: var(--font-caption);
  color: var(--color-text-muted);
}

.times dd {
  margin: 0;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: var(--space-sm);
}

.button {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 var(--space-lg);
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  font: var(--font-label);
  font-size: 16px;
  text-decoration: none;
  cursor: pointer;
}

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

.button-secondary {
  background: var(--color-surface-raised);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

.button:focus-visible,
.link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

/*
 * Landing page (/). Mobile first: one column up to 767px, a wider single
 * column with the sample cards side by side from 768px, and a two-column
 * hero from 1024px. Scoped to body.landing so the link pages are unchanged.
 */

.landing {
  --shell-width: 1200px;
  --shell-gutter: var(--space-lg);
  background:
    radial-gradient(120% 60% at 50% -10%, var(--color-accent-faint), transparent 60%),
    var(--color-background);
}

.shell {
  width: 100%;
  max-width: var(--shell-width);
  margin: 0 auto;
  padding-left: calc(var(--shell-gutter) + env(safe-area-inset-left, 0px));
  padding-right: calc(var(--shell-gutter) + env(safe-area-inset-right, 0px));
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Header */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-top: calc(var(--space-lg) + env(safe-area-inset-top, 0px));
  padding-bottom: var(--space-lg);
}

.brand {
  display: block;
  border-radius: var(--radius-control);
}

.brand-wordmark {
  display: block;
  width: 104px;
  height: auto;
}

.testing-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin: 0;
  padding: 6px var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  font: var(--font-caption);
  font-weight: 600;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* Hero */

.hero {
  display: grid;
  gap: var(--space-xxl);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xxxl);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-lg);
}

.hero-title {
  margin: 0;
  font-family: var(--font-family);
  font-weight: 800;
  font-size: clamp(34px, 10vw, 44px);
  line-height: 1.04;
  letter-spacing: -0.035em;
}

.hero-line {
  display: block;
}

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

.hero-lede {
  margin: 0;
  max-width: 34ch;
  font-size: 17px;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.hero-note {
  margin: 0;
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--color-border);
  border-left: 2px solid var(--color-accent);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  font: var(--font-label);
  font-weight: 500;
  color: var(--color-text-primary);
}

.hero-link {
  font: var(--font-label);
  color: var(--color-accent);
  text-underline-offset: 4px;
}

.brand:focus-visible,
.hero-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

/* Sample Challenge */

.hero-visual {
  position: relative;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.hero-visual::before {
  content: '';
  position: absolute;
  inset: -8% 0 8%;
  z-index: -1;
  background: radial-gradient(closest-side, var(--color-accent-soft), transparent);
  pointer-events: none;
}

.demo-stage {
  width: 100%;
  max-width: 400px;
}

.demo-card,
.demo-board {
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sheet);
  background: linear-gradient(180deg, var(--color-surface-raised), var(--color-surface));
  box-shadow: 0 24px 48px -16px var(--color-shadow);
}

.demo-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding: var(--space-xl) var(--space-lg);
  animation: demo-rise 480ms ease-out both;
}

.demo-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.demo-activity,
.demo-side-label,
.demo-board-title {
  margin: 0;
  font: var(--font-caption);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.demo-activity {
  color: var(--color-accent);
}

.demo-status {
  margin: 0;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  font: var(--font-caption);
  font-weight: 600;
  color: var(--color-accent);
}

.demo-sides {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.demo-side {
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-background);
}

.demo-side-name {
  margin: 2px 0 var(--space-sm);
  font: var(--font-heading);
  font-weight: 700;
}

.demo-players {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-width: 0;
}

.demo-avatars {
  display: inline-flex;
  flex-shrink: 0;
}

.demo-avatars .demo-avatar + .demo-avatar {
  margin-left: -8px;
}

.demo-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: 2px solid var(--color-background);
  border-radius: 50%;
  background: var(--color-border-strong);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text-primary);
}

.demo-names {
  font: var(--font-label);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.demo-vs {
  margin: 0;
  text-align: center;
  font: var(--font-caption);
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}

.demo-time,
.demo-deadline {
  margin: 0;
  font: var(--font-label);
}

.demo-deadline {
  color: var(--color-accent);
}

.demo-backing {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.demo-split-labels {
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  font: var(--font-caption);
  color: var(--color-text-secondary);
}

.demo-percent {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-primary);
}

.demo-split {
  display: flex;
  gap: 3px;
  height: 8px;
}

.demo-split-a,
.demo-split-b {
  border-radius: var(--radius-pill);
}

.demo-split-a {
  flex: 62;
  background: var(--color-text-primary);
}

.demo-split-b {
  flex: 38;
  background: var(--color-text-muted);
}

.demo-pool {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-sm);
}

.demo-pool .dibs-amount {
  font: var(--font-heading);
  font-weight: 700;
}

.demo-pool-label {
  font: var(--font-caption);
  color: var(--color-text-muted);
}

.dibs-amount {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.dibs-glyph {
  width: auto;
  height: 0.9em;
}

/* Sample scoreboard: shown alongside the Challenge from 768px. */

.demo-board {
  display: none;
  padding: var(--space-lg);
}

.demo-board-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin: var(--space-md) 0 0;
  padding: 0;
  list-style: none;
}

.demo-board-row {
  display: grid;
  grid-template-columns: 16px 28px 1fr auto;
  align-items: center;
  gap: var(--space-sm);
  font: var(--font-label);
}

.demo-board-row:first-child .demo-rank,
.demo-board-row:first-child .dibs-amount {
  color: var(--color-accent);
}

.demo-rank {
  font-variant-numeric: tabular-nums;
  color: var(--color-text-muted);
}

.demo-board-row .demo-avatar {
  border-color: var(--color-surface);
}

.demo-board-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.demo-caption {
  max-width: 400px;
  font: var(--font-caption);
  text-align: center;
  color: var(--color-text-muted);
}

@keyframes demo-rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Sections */

.section {
  padding-top: var(--space-xxxl);
  padding-bottom: var(--space-xxxl);
  border-top: 1px solid var(--color-border);
}

.section-title {
  margin: 0;
  font: var(--font-title);
  letter-spacing: -0.02em;
}

.section-body {
  margin: var(--space-md) 0 0;
  max-width: 52ch;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.steps {
  display: grid;
  gap: var(--space-lg);
  margin: var(--space-xl) 0 0;
  padding: 0;
  list-style: none;
}

.step {
  display: grid;
  grid-template-columns: 40px 1fr;
  column-gap: var(--space-lg);
  row-gap: var(--space-xs);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.step-number {
  grid-row: span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  font: var(--font-heading);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
}

.step-title,
.circle-point-title {
  margin: 0;
  font: var(--font-heading);
  font-size: 18px;
}

.step-body,
.circle-point-body {
  margin: 0;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.circle {
  display: grid;
  gap: var(--space-xl);
}

.circle-points {
  display: grid;
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
}

.circle-point {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding-left: var(--space-lg);
  border-left: 2px solid var(--color-border-strong);
}

/* Footer */

.site-footer {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
  padding-top: var(--space-xl);
  padding-bottom: calc(var(--space-xl) + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--color-border);
}

.footer-wordmark {
  display: block;
  width: 72px;
  height: auto;
  opacity: 0.8;
}

.footer-text {
  margin: 0;
  font: var(--font-caption);
  color: var(--color-text-muted);
}

/* Tablet: a wider single column; the sample cards sit side by side. */

@media (min-width: 768px) {
  .landing {
    --shell-gutter: var(--space-xxl);
  }

  .brand-wordmark {
    width: 120px;
  }

  .hero {
    gap: var(--space-xxxl);
    padding-top: var(--space-xxl);
    padding-bottom: 64px;
  }

  .hero-title {
    font-size: 56px;
  }

  .hero-lede {
    font-size: 19px;
  }

  .demo-stage {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--space-lg);
    max-width: 680px;
  }

  .demo-board {
    display: block;
    margin-top: var(--space-xxxl);
    animation: demo-rise 480ms 120ms ease-out both;
  }

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

  .step {
    grid-template-columns: 1fr;
    row-gap: var(--space-sm);
  }

  .step-number {
    grid-row: auto;
    margin-bottom: var(--space-sm);
  }

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

  .site-footer {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* Desktop: two-column hero, copy left and the sample Challenge right. */

@media (min-width: 1024px) {
  .landing {
    --shell-gutter: 40px;
  }

  .site-header {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .brand-wordmark {
    width: 128px;
  }

  .hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    gap: 64px;
    min-height: min(720px, calc(100vh - 96px));
    padding-top: var(--space-xxl);
    padding-bottom: 96px;
  }

  .hero-copy {
    gap: var(--space-xl);
  }

  .hero-title {
    font-size: clamp(48px, 4.6vw, 68px);
  }

  .hero-lede {
    font-size: 20px;
  }

  .hero-visual {
    align-items: flex-end;
  }

  .demo-stage {
    position: relative;
    display: block;
    max-width: 400px;
    margin-bottom: 152px;
  }

  .demo-card {
    padding: var(--space-xl);
  }

  .demo-board {
    position: absolute;
    top: calc(100% - 16px);
    left: -48px;
    width: 248px;
    margin: 0;
  }

  .demo-caption {
    align-self: center;
  }
}

@media (min-width: 1280px) {
  .demo-board {
    left: -96px;
  }

  .section {
    padding-top: 80px;
    padding-bottom: 80px;
  }

  .section-title {
    font-size: 36px;
    line-height: 1.15;
  }

  .step {
    padding: var(--space-xl);
  }

  .circle {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 64px;
    align-items: start;
  }

  .circle-points {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}