/* Reel Math website — one stylesheet, no web fonts, no third-party requests.
   Mirrors the app: an ocean that runs from a pale noon sky to the deep, rounded type, glassy cards. */

:root {
  --sky-top: #bdf0ff;
  --sky-low: #e8fbff;
  --sea-1: #5fc4ef;
  --sea-2: #1f8fcf;
  --sea-3: #063a63;
  --ink: #0b2545;
  --ink-soft: #3a5a78;
  --paper: #f6fbff;
  --card: rgba(255, 255, 255, 0.72);
  --card-strong: rgba(255, 255, 255, 0.9);
  --card-border: rgba(255, 255, 255, 0.85);
  --accent: #1f7ac0;
  --gold: #ffc93c;
  --coral: #ff7a59;
  --skibidi: #6c5ce7;
  --shadow: 0 10px 30px rgba(6, 26, 58, 0.18);
  --radius: 22px;
  --max: 1080px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --sky-top: #0a1430;
    --sky-low: #1d2c54;
    --sea-1: #123654;
    --sea-2: #0a2540;
    --sea-3: #020c18;
    --ink: #e8f4ff;
    --ink-soft: #a9c3dc;
    --paper: #06142a;
    --card: rgba(16, 38, 70, 0.72);
    --card-strong: rgba(16, 38, 70, 0.92);
    --card-border: rgba(130, 190, 255, 0.18);
    --accent: #7cc8ff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: ui-rounded, "SF Pro Rounded", "Nunito", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; height: auto; display: block; }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 12px; z-index: 10; background: var(--card-strong); padding: 8px 14px; border-radius: 12px; }

.wrap { width: min(var(--max), 100% - 32px); margin-inline: auto; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 5;
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  background: color-mix(in srgb, var(--paper) 72%, transparent);
  border-bottom: 1px solid var(--card-border);
}
.site-header .wrap { display: flex; align-items: center; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 800; font-size: 1.15rem; }
.brand img { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 2px 8px rgba(6, 26, 58, 0.25); }
.site-nav { margin-left: auto; display: flex; gap: 6px 18px; flex-wrap: wrap; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-weight: 600; font-size: 0.95rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }

/* ---------- hero: a sky band over a sea band, joined by a wave (the game's waterline) ---------- */
.hero-sky { background: linear-gradient(180deg, var(--sky-top), var(--sky-low)); text-align: center; padding: 54px 0 0; }
.hero-icon { width: 112px; height: 112px; border-radius: 26px; margin: 0 auto; box-shadow: 0 14px 34px rgba(6, 26, 58, 0.3); }
.hero-sky h1 { font-size: clamp(2.8rem, 7vw, 4.6rem); line-height: 1.02; margin: 20px 0 6px; font-weight: 900; letter-spacing: -0.02em; }
.hero-sky .tagline { font-size: clamp(1.2rem, 2.6vw, 1.55rem); font-weight: 750; margin: 0; color: var(--ink-soft); }
.waterline { display: block; width: 100%; height: 70px; margin-top: 30px; }
.waterline path { fill: var(--sea-1); }
.hero-sea {
  position: relative; overflow: hidden; color: #fff; padding: 6px 0 70px;
  background: linear-gradient(180deg, var(--sea-1) 0%, var(--sea-2) 45%, var(--sea-3) 100%);
}
.hero-sea::before { /* light shafts */
  content: ""; position: absolute; inset: 0 -10%;
  background: repeating-linear-gradient(100deg, rgba(255,255,255,0.10) 0 60px, transparent 60px 190px);
  mask-image: linear-gradient(180deg, #000, transparent 80%); -webkit-mask-image: linear-gradient(180deg, #000, transparent 80%);
  pointer-events: none;
}
.hero-sea .wrap { position: relative; display: grid; gap: 36px; grid-template-columns: 1fr 1fr; align-items: center; }
.hero-sea .lede { font-size: 1.18rem; margin: 0 0 22px; text-shadow: 0 1px 8px rgba(6, 26, 58, 0.45); }
.badges { display: flex; flex-wrap: wrap; gap: 10px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 999px;
  background: rgba(255,255,255,0.18); border: 1px solid rgba(255,255,255,0.45); color: #fff;
  font-weight: 700; font-size: 0.95rem; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.pill.primary { background: #fff; color: #063a63; border-color: #fff; }
.hero-shots { display: flex; justify-content: center; gap: 18px; }
.phone { width: min(240px, 40vw); border-radius: 30px; overflow: hidden; border: 6px solid #0b1a2e;
  box-shadow: 0 24px 60px rgba(2, 12, 24, 0.5); background: #0b1a2e; }
.phone + .phone { margin-top: 64px; }

/* ---------- sections ---------- */
section { padding: 64px 0; }
.section-title { font-size: clamp(1.7rem, 3.4vw, 2.3rem); line-height: 1.15; margin: 0 0 10px; font-weight: 850; letter-spacing: -0.01em; }
.section-sub { color: var(--ink-soft); margin: 0 0 28px; max-width: 46em; }

.grid { display: grid; gap: 18px; }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 22px 22px 18px; box-shadow: var(--shadow);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.card h3 { margin: 6px 0 6px; font-size: 1.15rem; line-height: 1.25; }
.card p { margin: 0; color: var(--ink-soft); }
.card .emoji { font-size: 1.9rem; line-height: 1; }

.ocean-band {
  background: linear-gradient(180deg, var(--paper), color-mix(in srgb, var(--sea-1) 22%, var(--paper)));
}

/* modes */
.modes { display: grid; gap: 14px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.mode { position: relative; text-align: center; padding: 20px 14px 16px; }
.mode .emoji { font-size: 2.2rem; }
.mode h3 { margin: 6px 0 2px; }
.mode p { font-size: 0.92rem; }
.mode.hot { background: linear-gradient(160deg, #ffb085, #f08a4b); color: #3a1300; border-color: transparent; }
.mode.hot p { color: #5a2400; }
.mode.special { background: linear-gradient(160deg, #8f86ff, #5b4bd6); color: #fff; border-color: transparent; }
.mode.special p { color: #e7e4ff; }
.tag {
  position: absolute; top: 10px; right: 10px; font-size: 0.72rem; font-weight: 800; padding: 3px 9px; border-radius: 999px;
  background: var(--gold); color: #2b1d00; letter-spacing: 0.02em;
}
.tag.free { background: #2fbf71; color: #022b14; }

/* screenshots strip */
.shots { display: grid; grid-auto-flow: column; grid-auto-columns: min(250px, 70vw); gap: 18px; overflow-x: auto;
  scroll-snap-type: x mandatory; padding: 6px 4px 18px; }
.shots figure { margin: 0; scroll-snap-align: start; }
.shots img { border-radius: 24px; border: 5px solid #0b1a2e; box-shadow: var(--shadow); }
.shots figcaption { font-size: 0.9rem; color: var(--ink-soft); margin-top: 8px; text-align: center; }
.shots .wide { grid-column: span 2; }

.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.checks li { padding-left: 30px; position: relative; }
.checks li::before { content: "✓"; position: absolute; left: 0; top: 0; font-weight: 900; color: #2fbf71; }

/* ---------- document pages (privacy, terms, support) ---------- */
.doc-hero { background: linear-gradient(180deg, var(--sky-top), var(--sky-low)); padding: 46px 0 30px; }
@media (prefers-color-scheme: dark) { .doc-hero { background: linear-gradient(180deg, var(--sky-top), var(--sea-2)); } }
.doc-hero h1 { margin: 0 0 6px; font-size: clamp(2rem, 4.4vw, 2.8rem); line-height: 1.1; font-weight: 900; }
.doc-hero p { margin: 0; color: var(--ink-soft); }
.doc { padding: 34px 0 70px; }
.doc .wrap { max-width: 760px; }
.doc h2 { font-size: 1.35rem; margin: 2.1em 0 0.5em; line-height: 1.25; }
.doc h3 { font-size: 1.1rem; margin: 1.6em 0 0.4em; }
.doc ul { padding-left: 1.3em; }
.doc li { margin: 0.35em 0; }
.callout { background: var(--card); border: 1px solid var(--card-border); border-radius: 18px; padding: 16px 18px; box-shadow: var(--shadow); }
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.toc a { text-decoration: none; font-weight: 700; font-size: 0.92rem; padding: 7px 13px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--card-border); color: var(--ink); }

details.faq { background: var(--card); border: 1px solid var(--card-border); border-radius: 16px; padding: 4px 18px; margin: 10px 0; }
details.faq summary { cursor: pointer; font-weight: 750; padding: 12px 0; list-style: none; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "＋"; float: right; color: var(--ink-soft); }
details.faq[open] summary::after { content: "－"; }
details.faq > :not(summary) { margin-top: 0; }
details.faq p:last-child, details.faq ul:last-child { margin-bottom: 14px; }
kbd { font-family: inherit; font-size: 0.85em; padding: 1px 7px; border-radius: 7px; border: 1px solid var(--card-border);
  background: var(--card-strong); box-shadow: 0 1px 0 rgba(0,0,0,0.12); }

.align-start { align-items: start; }
.card p.mt { margin-top: 12px; }

/* ---------- footer ---------- */
.site-footer { background: var(--sea-3); color: #cfe6ff; padding: 34px 0 40px; font-size: 0.95rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; }
.site-footer a { color: #fff; text-decoration: none; font-weight: 600; }
.site-footer a:hover { text-decoration: underline; }
.site-footer .copy { margin-left: auto; color: #9fc1e0; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero-sea .wrap { grid-template-columns: 1fr; text-align: center; }
  .hero-sea .badges { justify-content: center; }
  .grid.three, .modes { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .site-nav .wide-only { display: none; }
  .grid.three, .grid.two { grid-template-columns: 1fr; }
  .modes { grid-template-columns: 1fr 1fr; }
  .phone + .phone { display: none; }
  .site-footer .copy { margin-left: 0; }
}