/* ==========================================================================
   Decadoku — marketing site styles
   Palette & radii mirror the in-app Theme (Match10Game/Models/Theme.swift)
   ========================================================================== */

:root {
  color-scheme: light; /* always render light, ignore system dark mode */
  /* Brand palette (light) */
  --bg: #f8f5f5;
  --bg-elev: #ffffff;
  --text: #2c2c2c;
  --text-soft: #6b6b6b;
  --red: #e65151;
  --blue: #4d6bbe;
  --yellow: #f5c851;
  --green: #4dbe88;
  --purple: #9f6bbe;
  --orange: #d8807f;
  --border: rgba(44, 44, 44, 0.1);
  --shadow: 0 8px 24px rgba(44, 44, 44, 0.1);
  --shadow-soft: 0 4px 14px rgba(44, 44, 44, 0.07);

  /* Radii (Theme.Constants) */
  --r-item: 12px;
  --r-card: 20px;
  --r-pill: 30px;

  --maxw: 1080px;
  --font: -apple-system, "SF Pro Rounded", ui-rounded, "Segoe UI", "Noto Sans TC",
    system-ui, "Helvetica Neue", Arial, sans-serif;
}

/* ----- Language toggle (dual-language blocks) ----- */
html.lang-en .lang-zh { display: none !important; }
html.lang-zh .lang-en { display: none !important; }

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.2; font-weight: 800; letter-spacing: -0.02em; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--r-pill);
  font-weight: 700;
  font-size: 1.05rem;
  border: none;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.12s ease, box-shadow 0.12s ease;
  box-shadow: var(--shadow-soft);
}
.btn:hover { transform: translateY(-2px); text-decoration: none; opacity: 0.95; }
.btn:active { transform: translateY(0); opacity: 0.85; }
.btn-primary { background: var(--red); color: #fff; }
.btn-blue { background: var(--blue); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
  box-shadow: none;
}

/* ----- Header ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 22%; }
.nav { display: flex; align-items: center; gap: 18px; }
.nav a { color: var(--text-soft); font-weight: 600; font-size: 0.95rem; }
.nav a:hover { color: var(--text); text-decoration: none; }

.lang-switch {
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  color: var(--text);
  border-radius: var(--r-pill);
  padding: 7px 16px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  font-family: var(--font);
}
.lang-switch:hover { border-color: var(--blue); }

/* ----- Hero ----- */
.hero { position: relative; overflow: hidden; padding: 84px 0 72px; text-align: center; }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 55% at 20% 12%, color-mix(in srgb, var(--red) 22%, transparent), transparent 70%),
    radial-gradient(55% 50% at 85% 18%, color-mix(in srgb, var(--blue) 22%, transparent), transparent 70%),
    radial-gradient(60% 60% at 60% 95%, color-mix(in srgb, var(--yellow) 20%, transparent), transparent 70%);
  z-index: -1;
}
.hero-icon { width: 132px; height: 132px; border-radius: 29%; box-shadow: var(--shadow); margin-bottom: 22px; }
.hero h1 { font-size: clamp(2.6rem, 7vw, 4.2rem); margin: 0 0 10px; font-weight: 900; }
.hero .tagline { font-size: clamp(1.15rem, 3vw, 1.5rem); color: var(--text); font-weight: 700; margin: 0 0 8px; }
.hero .sub { font-size: 1.05rem; color: var(--text-soft); max-width: 560px; margin: 0 auto 30px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.store-badge { display: inline-flex; align-items: center; cursor: pointer; }
.store-badge img { height: 52px; width: auto; display: block; }
.store-badge:hover { transform: translateY(-2px); transition: transform .12s ease; }
.hint { font-size: 0.85rem; color: var(--text-soft); margin-top: 14px; }

/* ----- Sections ----- */
section { padding: 64px 0; }
.section-title { text-align: center; font-size: clamp(1.7rem, 4vw, 2.4rem); margin: 0 0 8px; }
.section-sub { text-align: center; color: var(--text-soft); max-width: 620px; margin: 0 auto 44px; font-size: 1.05rem; }

/* ----- Feature cards ----- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: 26px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card .emoji {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; border-radius: var(--r-item);
  font-size: 1.6rem; margin-bottom: 14px;
}
.card h3 { font-size: 1.2rem; margin: 0 0 6px; }
.card p { margin: 0; color: var(--text-soft); font-size: 0.98rem; }
.c-red .emoji { background: color-mix(in srgb, var(--red) 16%, transparent); }
.c-blue .emoji { background: color-mix(in srgb, var(--blue) 16%, transparent); }
.c-yellow .emoji { background: color-mix(in srgb, var(--yellow) 22%, transparent); }
.c-green .emoji { background: color-mix(in srgb, var(--green) 16%, transparent); }
.c-purple .emoji { background: color-mix(in srgb, var(--purple) 16%, transparent); }
.c-orange .emoji { background: color-mix(in srgb, var(--orange) 16%, transparent); }

/* ----- How to play ----- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.step { text-align: center; }
.step .num {
  width: 56px; height: 56px; margin: 0 auto 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--red); color: #fff; font-size: 1.5rem; font-weight: 800;
  border-radius: 50%; box-shadow: var(--shadow-soft);
}
.step:nth-child(2) .num { background: var(--blue); }
.step:nth-child(3) .num { background: var(--yellow); color: var(--text); }
.step h3 { font-size: 1.15rem; margin: 0 0 6px; }
.step p { color: var(--text-soft); margin: 0; }

/* ----- Screenshots gallery ----- */
.shots-scroll {
  display: flex;
  gap: 28px;
  overflow-x: auto;
  padding: 10px 4px 24px;
  scroll-snap-type: x mandatory;
  justify-content: flex-start;
}
.shots-scroll.center { justify-content: center; }
@media (max-width: 900px) { .shots-scroll { justify-content: flex-start; } }

/* iPhone frame (landscape — matches 2868×1320 screenshots) */
.phone {
  scroll-snap-align: center;
  flex: 0 0 auto;
  width: clamp(300px, 80vw, 500px);
  background: var(--bg-elev);
  border: 9px solid #111;
  border-radius: 30px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
/* iPad frame (landscape — matches 2752×2064 screenshots) */
.pad {
  scroll-snap-align: center;
  flex: 0 0 auto;
  width: clamp(300px, 80vw, 480px);
  background: var(--bg-elev);
  border: 12px solid #111;
  border-radius: 24px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
/* image drives the frame height → frame hugs the screenshot exactly, no cropping */
.phone img, .pad img { width: 100%; height: auto; display: block; }

.shot-placeholder {
  width: 100%; height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; text-align: center; padding: 20px;
  background:
    radial-gradient(70% 50% at 50% 0%, color-mix(in srgb, var(--red) 14%, transparent), transparent 70%),
    var(--bg);
  color: var(--text-soft);
}
.shot-placeholder .ph-num { font-size: 2.4rem; font-weight: 900; color: var(--text); opacity: 0.5; }
.shot-placeholder small { font-size: 0.82rem; }
.device-label { text-align: center; color: var(--text-soft); font-weight: 700; margin: 6px 0 30px; }

/* ----- Generic content pages (privacy / support) ----- */
.page { padding: 56px 0 80px; }
.page h1 { font-size: clamp(2rem, 5vw, 2.8rem); margin: 0 0 6px; }
.page .updated { color: var(--text-soft); font-size: 0.95rem; margin: 0 0 36px; }
.page h2 { font-size: 1.4rem; margin: 38px 0 12px; }
.page h3 { font-size: 1.1rem; margin: 22px 0 8px; }
.page p, .page li { color: var(--text); font-size: 1.02rem; }
.page ul { padding-left: 22px; }
.page li { margin: 6px 0; }
.page .lead { font-size: 1.1rem; color: var(--text-soft); }
.callout {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 4px solid var(--blue);
  border-radius: var(--r-item);
  padding: 16px 20px;
  margin: 20px 0;
}
.data-table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.96rem; }
.data-table th, .data-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.data-table th { font-weight: 800; }
.data-table tr:last-child td { border-bottom: none; }

/* FAQ */
.faq details {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: 6px 20px;
  margin: 12px 0;
}
.faq summary {
  cursor: pointer; font-weight: 700; font-size: 1.08rem; padding: 14px 0;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.5rem; color: var(--text-soft); font-weight: 400; }
.faq details[open] summary::after { content: "\2013"; }
.faq details p { margin: 0 0 16px; color: var(--text-soft); }

.contact-box {
  text-align: center;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: 32px;
  margin-top: 28px;
}
.contact-email { font-size: 1.3rem; font-weight: 800; color: var(--blue); }

/* ----- Footer ----- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 40px;
  color: var(--text-soft);
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.site-footer .links { display: flex; gap: 20px; flex-wrap: wrap; align-items: center; }
.site-footer a { color: var(--text-soft); font-weight: 600; }
.site-footer a:hover { color: var(--text); }
.site-footer .copyright { font-size: 0.9rem; }

/* ----- Misc ----- */
.center { text-align: center; }
.mt-40 { margin-top: 40px; }
.back-link { display: inline-block; margin-bottom: 18px; font-weight: 700; }