/* ============================================================================
 * RiftWords landing · style.css
 * Source of truth: docs/brand/brand-guide.md + docs/brand/landing-brief.md
 * Tokens, type scale, breakpoints, and section behaviour all map to those docs.
 * No frameworks, no preprocessors, no JS dependencies. Mobile-first.
 * Companion: style-pages.css covers sections 10-16 (screenshots, languages,
 * press, footer, doc pages, reduced-motion, print).
 * ============================================================================ */

/* ---------------------------------------------------------------------------
 * 1 · Tokens (brand-guide §2.1, landing-brief §3 + §6)
 * --------------------------------------------------------------------------- */
:root {
  --color-bg:              #0B0E16;
  --color-surface:         #10131B;
  --color-surface-raised:  #1A1F2C;
  --color-surface-soft:    #F4F1EA;

  --color-ink:             #E0E2ED;
  --color-ink-dim:         #C1C6D7;
  --color-ink-muted:       #8B90A0;
  --color-ink-on-soft:     #1B1F2A;

  --color-primary:         #ADC7FF;
  --color-primary-glow:    #4A8EFF;
  --color-primary-ink:     #002E68;
  --color-accent-teal:     #00E383;
  --color-accent-amber:    #F0A830;
  --color-accent-violet:   #C8C0F7;
  --color-danger:          #FFB4AB;
  --color-success:         #5BFFA1;

  --color-border:          #414754;
  --color-border-soft:     rgba(255, 255, 255, 0.10);
  --color-border-strong:   rgba(255, 255, 255, 0.18);
  --color-focus-ring:      #4A8EFF;

  --font-display: "Lora", Georgia, "Times New Roman", serif;
  --font-heading: "Barlow Condensed", "Arial Narrow", "Helvetica Neue Condensed", sans-serif;
  --font-body:    "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --text-eyebrow:    0.75rem;
  --text-body-sm:    0.875rem;
  --text-body:       1rem;
  --text-body-lg:    1.0625rem;
  --text-h3:         1.25rem;
  --text-h2:         1.75rem;
  --text-h1-tagline: clamp(1.5rem, 6vw, 2rem);
  --text-mono:       0.75rem;

  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px; --space-9: 96px;

  --radius-sm: 8px; --radius-md: 12px; --radius-lg: 18px; --radius-pill: 24px;

  --content-max: 64rem;
  --nav-height: 52px;

  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-hover: 180ms;
  --dur-card:  200ms;
  --dur-fade:  220ms;
}

@media (min-width: 48rem) {
  :root {
    --text-eyebrow: 0.875rem;
    --text-body-lg: 1.125rem;
    --text-h3: 1.5rem;
    --text-h2: 2.25rem;
    --text-mono: 0.875rem;
    --nav-height: 56px;
  }
}

/* ---------------------------------------------------------------------------
 * 2 · Self-hosted fonts (drop .woff2 files into web/assets/fonts/)
 *    Subset to Latin + Latin-ext only. font-display: swap.
 *    See web/README.md §1 for the list of files the deployer must drop in.
 * --------------------------------------------------------------------------- */
@font-face { font-family: "Lora"; font-weight: 700; font-style: normal; font-display: swap;
  src: url("assets/fonts/lora-700.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+20AC, U+2122, U+FEFF, U+FFFD; }
@font-face { font-family: "Barlow Condensed"; font-weight: 700; font-style: normal; font-display: swap;
  src: url("assets/fonts/barlow-condensed-700.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+20AC, U+2122, U+FEFF, U+FFFD; }
@font-face { font-family: "Barlow Condensed"; font-weight: 800; font-style: normal; font-display: swap;
  src: url("assets/fonts/barlow-condensed-800.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+20AC, U+2122, U+FEFF, U+FFFD; }
@font-face { font-family: "Hanken Grotesk"; font-weight: 400; font-style: normal; font-display: swap;
  src: url("assets/fonts/hanken-grotesk-400.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+20AC, U+2122, U+FEFF, U+FFFD; }
@font-face { font-family: "Hanken Grotesk"; font-weight: 500; font-style: normal; font-display: swap;
  src: url("assets/fonts/hanken-grotesk-500.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+20AC, U+2122, U+FEFF, U+FFFD; }
@font-face { font-family: "JetBrains Mono"; font-weight: 500; font-style: normal; font-display: swap;
  src: url("assets/fonts/jetbrains-mono-500.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2122, U+FEFF, U+FFFD; }

/* ---------------------------------------------------------------------------
 * 3 · Reset + base
 * --------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; height: auto; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: var(--color-primary); text-decoration: none; border-radius: 2px; transition: color var(--dur-hover) var(--ease-out); }
a:hover { text-decoration: underline; text-decoration-color: var(--color-primary-glow); text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:focus-visible,
button:focus-visible { outline: 2px solid var(--color-focus-ring); outline-offset: 2px; border-radius: 2px; }
button { font: inherit; cursor: pointer; }
hr { border: 0; border-top: 1px solid var(--color-border-soft); margin: var(--space-7) 0; }
p { margin: 0 0 var(--space-4); max-width: 65ch; }
h1, h2, h3, h4 { margin: 0 0 var(--space-4); color: var(--color-ink); }

/* ---------------------------------------------------------------------------
 * 4 · Utility · skip link, sr-only, eyebrow, layout primitives, reveal
 * --------------------------------------------------------------------------- */
.skip-link {
  position: absolute; top: -100px; left: var(--space-4);
  background: var(--color-primary); color: var(--color-primary-ink);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-pill);
  font-family: var(--font-heading); font-weight: 700;
  letter-spacing: 0.10em; text-transform: uppercase;
  z-index: 200;
  transition: top 120ms var(--ease-out);
}
.skip-link:focus { top: var(--space-4); text-decoration: none; }

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

.eyebrow {
  font-family: var(--font-heading); font-weight: 700;
  font-size: var(--text-eyebrow);
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-3);
}

.shell {
  width: 100%; max-width: var(--content-max);
  margin-left: auto; margin-right: auto;
  padding-left: var(--space-5); padding-right: var(--space-5);
}
@media (min-width: 48rem) {
  .shell { padding-left: var(--space-7); padding-right: var(--space-7); }
}

.section { padding-top: var(--space-8); padding-bottom: var(--space-7); }
@media (min-width: 48rem) {
  .section { padding-top: var(--space-9); padding-bottom: var(--space-8); }
}

.reveal {
  opacity: 0; transform: translateY(12px);
  transition: opacity var(--dur-fade) var(--ease-out), transform var(--dur-fade) var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------------------------------------------------------------------------
 * 5 · Sticky nav (landing-brief §9.1)
 * --------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 14, 22, 0.80);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-soft);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: var(--nav-height); gap: var(--space-4); }
.nav__brand {
  display: inline-flex; align-items: center; gap: var(--space-2);
  color: var(--color-ink);
  font-family: var(--font-heading); font-weight: 700;
  letter-spacing: 0.18em; text-transform: uppercase;
  font-size: 0.875rem;
  flex: 0 0 auto;
}
.nav__brand .wordmark-mini { height: 22px; width: auto; }
.nav__icon { width: 28px; height: 28px; border-radius: 6px; flex: 0 0 28px; display: block; }
.nav__brand:hover { text-decoration: none; }

.nav__links {
  display: flex; gap: var(--space-3);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav__links::-webkit-scrollbar { display: none; }
.nav__links li { scroll-snap-align: start; flex: 0 0 auto; }
.nav__links a {
  color: var(--color-ink-dim);
  font-family: var(--font-heading); font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  font-size: 0.875rem;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
}
.nav__links a:hover { color: var(--color-ink); text-decoration: none; }
.nav__links a[aria-current="true"] { color: var(--color-primary); }
@media (min-width: 64rem) { .nav__links { gap: var(--space-5); overflow: visible; } }

/* ---------------------------------------------------------------------------
 * 6 · Hero (landing-brief §2, §9.2)
 * --------------------------------------------------------------------------- */
.hero { position: relative; padding-top: var(--space-4); padding-bottom: var(--space-7); overflow: hidden; }
@media (min-width: 48rem) { .hero { padding-top: var(--space-5); padding-bottom: var(--space-8); } }
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 40%, rgba(74, 142, 255, 0.08), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.hero .shell { position: relative; z-index: 1; }
.hero__grid { display: grid; gap: var(--space-7); grid-template-columns: 1fr; align-items: center; }
@media (min-width: 48rem) { .hero__grid { grid-template-columns: 6fr 4fr; gap: var(--space-8); } }
@media (min-width: 64rem) { .hero__grid { grid-template-columns: 1fr 1fr; gap: var(--space-9); } }

.hero__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-5);
}
.hero__icon {
  width: clamp(4rem, 10.5vw, 7rem);
  height: clamp(4rem, 10.5vw, 7rem);
  border-radius: 22%;
  display: block;
  flex: 0 0 auto;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}
.hero__wordmark { display: block; height: clamp(3rem, 7vw, 5.5rem); width: auto; }
.hero__tagline {
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--text-h1-tagline);
  line-height: 1.2; letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
  max-width: 18ch;
}
@media (min-width: 64rem) { .hero__tagline { font-size: clamp(2.25rem, 3.2vw, 2.75rem); } }
.hero__lede { font-size: var(--text-body-lg); color: var(--color-ink-dim); max-width: 38ch; margin: 0 0 var(--space-6); }
.hero__credit { font-size: var(--text-body-sm); color: var(--color-ink-muted); margin-top: var(--space-4); }

.cta-row { display: flex; flex-direction: column; gap: var(--space-3); align-items: flex-start; }
@media (min-width: 30rem) {
  .cta-row { flex-direction: row; gap: var(--space-4); align-items: center; flex-wrap: wrap; }
}
.badge {
  display: inline-flex; align-items: center; justify-content: center;
  height: 48px; min-width: 144px;
  border-radius: var(--radius-pill);
  background: transparent;
  transition: filter var(--dur-hover) var(--ease-out), background var(--dur-hover) var(--ease-out);
}
@media (min-width: 48rem) { .badge { height: 56px; min-width: 168px; } }
.badge img, .badge svg { height: 100%; width: auto; }
.badge:hover { filter: brightness(1.04); text-decoration: none; }
.badge[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; filter: grayscale(0.4); }
.cta-note {
  font-family: var(--font-mono); font-size: var(--text-mono);
  letter-spacing: 0.06em; color: var(--color-ink-muted);
  margin: var(--space-3) 0 0;
  text-transform: uppercase;
}

.hero__visual { display: flex; justify-content: center; }
.phone-frame {
  position: relative;
  width: 100%; max-width: 320px;
  aspect-ratio: 390 / 844;
  border-radius: 36px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-soft);
  padding: 10px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04) inset;
  overflow: hidden;
}
.phone-frame__screen {
  width: 100%; height: 100%;
  border-radius: 28px;
  background: var(--color-bg);
  overflow: hidden;
}
.phone-frame__screen svg,
.phone-frame__screen img { width: 100%; height: 100%; display: block; }
.phone-frame__watermark {
  position: absolute; right: 12px; bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.625rem; letter-spacing: 0.10em; text-transform: lowercase;
  color: var(--color-ink-muted);
  opacity: 0.6;
  background: rgba(11, 14, 22, 0.6);
  padding: 2px 6px;
  border-radius: 4px;
  z-index: 2;
}

/* ---------------------------------------------------------------------------
 * 7 · About (landing-brief §9.3)
 * --------------------------------------------------------------------------- */
.about { text-align: center; padding-top: var(--space-8); padding-bottom: var(--space-7); }
.about__inner { max-width: 42rem; margin: 0 auto; }
.about p {
  font-size: clamp(1.25rem, 2.5vw, 1.625rem);
  line-height: 1.5;
  color: var(--color-ink);
  margin-left: auto; margin-right: auto;
}
.about strong,
.about em.brand-emphasis { color: var(--color-primary); font-style: normal; font-weight: 500; }

/* ---------------------------------------------------------------------------
 * 8 · Daily pitch (landing-brief §9.4)
 * --------------------------------------------------------------------------- */
.daily { padding-top: var(--space-7); padding-bottom: var(--space-7); }
.daily__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: grid;
  gap: var(--space-7);
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 48rem) { .daily__card { grid-template-columns: 3fr 2fr; padding: var(--space-7); } }
.daily .eyebrow { color: var(--color-primary); }
.daily h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--text-h2);
  line-height: 1.2; letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
  max-width: 18ch;
}
.daily__list { display: grid; gap: var(--space-3); margin: 0 0 var(--space-5); }
.daily__list li { color: var(--color-ink-dim); padding-left: var(--space-4); position: relative; max-width: 60ch; }
.daily__list li::before { content: "·"; color: var(--color-primary); position: absolute; left: 0; font-weight: 700; }
.daily__pill {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  background: rgba(173, 199, 255, 0.10);
  color: var(--color-primary);
  font-family: var(--font-mono); font-weight: 500;
  font-size: var(--text-mono);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.daily__pill::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 0.4; } 50% { opacity: 1; } }
.daily__visual { display: flex; justify-content: center; }
.daily__visual .phone-frame { max-width: 240px; }

/* ---------------------------------------------------------------------------
 * 9 · Features grid (landing-brief §9.5)
 * --------------------------------------------------------------------------- */
.features { padding-top: var(--space-7); padding-bottom: var(--space-7); }
.features__heading h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--text-h2);
  line-height: 1.2; letter-spacing: -0.01em;
  max-width: 22ch;
  margin-bottom: var(--space-6);
}

.mode-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }
@media (min-width: 48rem) { .mode-grid { grid-template-columns: 1fr 1fr; gap: var(--space-5); } }
@media (min-width: 64rem) { .mode-grid { grid-template-columns: repeat(4, 1fr); } }

.mode-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-5);
  transition: background var(--dur-card) var(--ease-out), border-color var(--dur-card) var(--ease-out);
  overflow: hidden;
}
.mode-card::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 5px;
  background: var(--mode-accent, var(--color-primary));
}
.mode-card:hover { background: var(--color-surface-raised); border-color: var(--color-border-strong); }
.mode-card h3 {
  font-family: var(--font-heading); font-weight: 700;
  font-size: var(--text-h3);
  letter-spacing: 0.10em; text-transform: uppercase;
  color: var(--mode-accent, var(--color-primary));
  margin: 0 0 var(--space-3);
}
.mode-card__icon {
  display: inline-flex; width: 28px; height: 28px;
  color: var(--mode-accent, var(--color-primary));
  margin-bottom: var(--space-4);
}
.mode-card p { color: var(--color-ink-dim); margin: 0; font-size: var(--text-body); }
.mode-card__cadence {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mode-accent, var(--color-primary));
  border: 1px solid currentColor;
  padding: 2px 8px;
  border-radius: 999px;
  margin-bottom: var(--space-3);
}

/* Colors match in-game ModeSelectScreen.
   DAILY = blue (#adc7ff), BLITZ = teal (#00e383),
   ASCENT = coral (#ffb4ab), ZEN·DLESS = amber (#f0a830).
   Background gradients translated from in-game gradColors rgba values. */
.mode-card[data-mode="daily"]  { --mode-accent: var(--color-primary);      background: linear-gradient(180deg, rgba(4,13,34,0.72), rgba(6,21,40,0.65), rgba(3,14,30,0.72)); }
.mode-card[data-mode="blitz"]  { --mode-accent: var(--color-accent-teal);  background: linear-gradient(180deg, rgba(4,26,20,0.68), rgba(6,31,25,0.68), rgba(4,26,20,0.68)); }
.mode-card[data-mode="ascent"] { --mode-accent: var(--color-danger);       background: linear-gradient(180deg, rgba(35,10,10,0.68), rgba(40,12,12,0.68), rgba(35,10,10,0.68)); }
.mode-card[data-mode="zen"]    { --mode-accent: var(--color-accent-amber); background: linear-gradient(180deg, rgba(35,28,10,0.68), rgba(40,32,12,0.68), rgba(35,28,10,0.68)); }

.features__strip { margin-top: var(--space-8); display: grid; gap: var(--space-6); grid-template-columns: 1fr; }
@media (min-width: 48rem) { .features__strip { grid-template-columns: 1fr 1fr; gap: var(--space-7); } }

.glyph-list { display: flex; flex-direction: column; gap: var(--space-3); }
.glyph-list li {
  display: grid; grid-template-columns: 28px 1fr; gap: var(--space-3);
  align-items: start;
  color: var(--color-ink-dim);
}
.glyph-list li strong {
  color: var(--color-ink);
  font-family: var(--font-heading); font-weight: 700;
  letter-spacing: 0.10em; text-transform: uppercase;
  font-size: var(--text-body);
  display: block;
  margin-bottom: 2px;
}
.glyph-list svg { width: 22px; height: 22px; margin-top: 4px; }
/* Colors match in-game GameGuideScreen.tsx (RIFT_ITEMS + POWERUP_ITEMS).
   Volatile = coral, Scramble = yellow, Cursed = purple. */
.glyph-list--rift svg[data-volatile] { color: #ffb4ab; }
.glyph-list--rift svg[data-scramble] { color: #f5c518; }
.glyph-list--rift svg[data-cursed]   { color: #9d4edd; }
.glyph-list--power li:nth-child(1) svg { color: var(--color-accent-teal); }   /* row · teal */
.glyph-list--power li:nth-child(2) svg { color: var(--color-primary); }       /* col · blue */
.glyph-list--power li:nth-child(3) svg { color: var(--color-accent-amber); }  /* cluster · amber */
.glyph-list--power li:nth-child(4) svg { color: #ff6b6b; }                    /* nuke · red */