/* ===========================================================
   Card Dive — Fun Brain Game
   Design tokens derived from the app icon: deep violet field,
   warm gold card border, cream card face, cranberry apple accent.
   =========================================================== */

:root {
  /* Color */
  --ink-900: #150735;   /* deepest background */
  --ink-800: #1D0B4B;   /* primary background */
  --ink-700: #2B1268;   /* gradient partner / raised panels on dark */
  --ink-600: #3B1D86;   /* borders / dividers on dark */
  --violet-mist: #8B7BC7; /* muted secondary text on dark */
  --gold: #FFC94A;
  --gold-deep: #E8A730;
  --cream: #FFF6E4;
  --cream-dim: #F6E9CC;
  --cranberry: #D2222D;
  --ink-text: #241246;  /* body text on cream */
  --ink-text-soft: #4B3B78;

  /* Type */
  --font-display: "Baloo 2", "Segoe UI Rounded", system-ui, sans-serif;
  --font-body: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Layout */
  --max-w: 1120px;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow-card: 0 18px 40px -18px rgba(21, 7, 53, 0.55);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--ink-800);
  color: var(--cream);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 0 0 0.5em;
  line-height: 1.15;
}

p { line-height: 1.7; margin: 0 0 1em; }

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

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

/* Focus visibility for keyboard users */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------------- Navbar ---------------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(21, 7, 53, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 201, 74, 0.16);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

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

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 6px 16px -6px rgba(0, 0, 0, 0.6);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  color: var(--cream);
  letter-spacing: 0.2px;
}

.brand-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--gold);
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  position: relative;
  font-weight: 700;
  font-size: 15px;
  color: var(--violet-mist);
  padding: 8px 14px;
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover {
  color: var(--cream);
  background: rgba(255, 201, 74, 0.1);
}

.nav-links a[aria-current="page"] {
  color: var(--ink-900);
  background: var(--gold);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--cream);
  font-size: 26px;
  cursor: pointer;
  padding: 4px 8px;
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }

  .nav-links {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--ink-900);
    padding: 10px 20px 20px;
    border-bottom: 1px solid rgba(255, 201, 74, 0.16);
    display: none;
    gap: 4px;
  }

  .nav-links.open { display: flex; }

  .nav-links a { padding: 12px 14px; }
}

/* ---------------- Buttons ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 15px;
  padding: 14px 26px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover { transform: translateY(-2px); }

.btn-gold {
  background: linear-gradient(180deg, var(--gold), var(--gold-deep));
  color: var(--ink-900);
  box-shadow: 0 12px 24px -10px rgba(255, 201, 74, 0.55);
}

.btn-ghost {
  background: transparent;
  color: var(--cream);
  border: 2px solid rgba(255, 246, 228, 0.28);
}

.btn-ghost:hover { border-color: var(--gold); }

.btn-block { width: 100%; }

/* ---------------- Page header (non-home pages) ---------------- */

.page-header {
  padding: 64px 0 40px;
  background:
    radial-gradient(600px 300px at 15% -10%, rgba(255, 201, 74, 0.16), transparent),
    linear-gradient(180deg, var(--ink-800), var(--ink-900));
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}

.page-header h1 {
  font-size: clamp(32px, 5vw, 46px);
  color: var(--cream);
}

.page-header .meta {
  color: var(--violet-mist);
  font-size: 14px;
  font-weight: 600;
}

/* ---------------- Hero (home) ---------------- */

.hero {
  position: relative;
  padding: 72px 0 96px;
  background:
    radial-gradient(900px 480px at 85% -10%, rgba(255, 201, 74, 0.18), transparent),
    radial-gradient(700px 400px at 0% 100%, rgba(210, 34, 45, 0.14), transparent),
    linear-gradient(160deg, var(--ink-800) 0%, var(--ink-700) 60%, var(--ink-800) 100%);
  overflow: hidden;
}

.hero .wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(38px, 5.4vw, 60px);
  color: var(--cream);
}

.hero-copy h1 .accent { color: var(--gold); }

.hero-copy p.lede {
  font-size: 18px;
  color: var(--violet-mist);
  max-width: 46ch;
}

.hero-art {
  display: flex;
  justify-content: center;
}

.hero-art img {
  width: min(420px, 100%);
  border-radius: 32px;
  box-shadow: var(--shadow-card);
  animation: float 5s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 18px;
}

.store-note {
  font-size: 13px;
  color: var(--violet-mist);
}

.fade-in {
  animation: fadeUp 0.7s ease both;
}
.fade-in.delay-1 { animation-delay: 0.08s; }
.fade-in.delay-2 { animation-delay: 0.16s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-art img { animation: none; }
  .fade-in { animation: none; }
}

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; text-align: center; }
  .hero-copy p.lede { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
}

/* ---------------- Two-card signature mark ---------------- */

.pair-mark {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.pair-mark span {
  width: 14px;
  height: 18px;
  border-radius: 4px;
  background: var(--gold);
  display: block;
}

.pair-mark span:last-child { background: var(--cranberry); }

.section-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 8px 0 28px;
  color: var(--violet-mist);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ---------------- Feature grid ---------------- */

.features {
  padding: 88px 0;
  background: var(--ink-900);
}

.features h2 {
  font-size: clamp(28px, 4vw, 38px);
  color: var(--cream);
  text-align: center;
  max-width: 22ch;
  margin-left: auto;
  margin-right: auto;
}

.features .section-divider { justify-content: center; }

.feature-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

@media (max-width: 860px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
}

.feature-card {
  background: var(--cream);
  color: var(--ink-text);
  border-radius: var(--radius-md);
  padding: 26px 24px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease;
}

.feature-card:hover { transform: translateY(-4px); }

.feature-card .pair-mark { margin-bottom: 14px; }

.feature-card h3 {
  font-size: 18px;
  color: var(--ink-text);
  margin-bottom: 6px;
}

.feature-card p {
  font-size: 14.5px;
  color: var(--ink-text-soft);
  margin: 0;
}

/* ---------------- Content card (privacy / terms / contact) ---------------- */

.content-section {
  padding: 56px 0 96px;
}

.doc-card {
  background: var(--cream);
  color: var(--ink-text);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 5vw, 56px);
  box-shadow: var(--shadow-card);
}

.doc-card h2 {
  font-size: 22px;
  color: var(--ink-text);
  margin-top: 2.2em;
  padding-top: 0.4em;
  border-top: 1px solid rgba(36, 18, 70, 0.12);
}

.doc-card h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }

.doc-card p, .doc-card li {
  color: var(--ink-text-soft);
  font-size: 15.5px;
}

.doc-card ul { padding-left: 22px; }
.doc-card li { margin-bottom: 8px; }

.doc-card strong { color: var(--ink-text); }

.doc-card a.inline-link {
  color: var(--cranberry);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.intro-note {
  background: rgba(255, 201, 74, 0.18);
  border: 1px solid rgba(232, 167, 48, 0.4);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 14.5px;
  color: var(--ink-text);
  margin-bottom: 8px;
}

/* ---------------- Contact page ---------------- */

.contact-card {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
}

.contact-card .pair-mark { justify-content: center; margin-bottom: 18px; }

.contact-rows {
  margin: 32px 0;
  display: grid;
  gap: 16px;
  text-align: left;
}

.contact-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 18px;
  background: var(--cream-dim);
  border-radius: var(--radius-sm);
}

.contact-row .label {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--cranberry);
  display: block;
  margin-bottom: 4px;
}

.contact-row .value {
  font-weight: 700;
  color: var(--ink-text);
  font-size: 15.5px;
}

/* ---------------- Footer ---------------- */

.site-footer {
  background: var(--ink-900);
  border-top: 1px solid rgba(255, 201, 74, 0.14);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 36px;
}

@media (max-width: 700px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

.footer-col h4 {
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}

.footer-col p, .footer-col a {
  color: var(--violet-mist);
  font-size: 14.5px;
  display: block;
  margin-bottom: 8px;
}

.footer-col a:hover { color: var(--cream); }

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-brand img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}

.footer-brand span {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--cream);
  font-size: 17px;
}

.footer-bottom {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 246, 228, 0.1);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  justify-content: space-between;
  color: var(--violet-mist);
  font-size: 13px;
}