:root {
  --accent:       #C8963E;
  --accent-light: #FDF3E3;
  --text-primary: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-tertiary: #AEAEB2;
  --border:       #D2D2D7;
  --bg:           #FFFFFF;
  --bg-alt:       #F5F5F7;
  --radius:       14px;
  --shadow:       0 2px 12px rgba(0,0,0,.08);
  --max-width:    780px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: rgba(255,255,255,.85);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo { font-weight: 700; font-size: 18px; color: var(--text-primary); text-decoration: none; }
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--text-secondary); text-decoration: none; font-size: 15px; }
.nav-links a:hover { color: var(--accent); }

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 72px 24px 56px;
  background: var(--bg-alt);
}
.app-icon {
  width: 100px;
  height: 100px;
  border-radius: 22px;
  background: linear-gradient(145deg, #F5E6C8 0%, #E1AF64 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 48px;
  box-shadow: 0 4px 20px rgba(225,175,100,.35);
}
.hero h1 { font-size: 38px; font-weight: 700; letter-spacing: -.5px; }
.hero .tagline { margin-top: 10px; font-size: 19px; color: var(--text-secondary); }
.hero .tagline-en { margin-top: 4px; font-size: 15px; color: var(--text-tertiary); }

/* ── Language toggle ── */
.lang-toggle { display: flex; justify-content: center; margin-top: 28px; }
.lang-btn {
  padding: 7px 24px;
  border: 1px solid var(--border);
  background: var(--bg);
  font-size: 14px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: background .15s, color .15s;
}
.lang-btn:first-child { border-radius: 8px 0 0 8px; }
.lang-btn:last-child  { border-radius: 0 8px 8px 0; border-left: none; }
.lang-btn.active { background: var(--text-primary); color: #fff; border-color: var(--text-primary); }

/* ── Main content ── */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 24px 80px;
}
section { margin-bottom: 64px; }

.section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
section h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -.3px;
  margin-bottom: 20px;
}

/* ── Cards ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 24px 20px;
  border: 1px solid var(--border);
}
.card-icon { font-size: 28px; margin-bottom: 12px; }
.card h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.card p  { font-size: 14px; color: var(--text-secondary); line-height: 1.5; }

/* ── Steps ── */
.steps { display: flex; flex-direction: column; gap: 20px; }
.step { display: flex; gap: 20px; align-items: flex-start; }
.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--accent);
}
.step-body h3 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.step-body p  { font-size: 15px; color: var(--text-secondary); }

/* ── FAQ ── */
.faq-list { display: flex; flex-direction: column; }
details { border-top: 1px solid var(--border); padding: 20px 0; }
details:last-child { border-bottom: 1px solid var(--border); }
summary {
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-size: 20px; font-weight: 300; color: var(--text-tertiary); }
details[open] summary::after { content: "−"; }
details .answer { margin-top: 12px; color: var(--text-secondary); font-size: 15px; line-height: 1.6; }

/* ── Contact ── */
.contact-box {
  background: var(--accent-light);
  border: 1px solid #E8C88A;
  border-radius: var(--radius);
  padding: 36px 32px;
  text-align: center;
}
.contact-box h2 { margin-bottom: 8px; }
.contact-box p { color: var(--text-secondary); margin-bottom: 20px; font-size: 15px; }
.contact-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 12px 32px;
  border-radius: 980px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
}
.contact-btn:hover { background: #b8832e; }

/* ── Privacy page ── */
.policy-section { margin-bottom: 44px; }
.policy-section h2 { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
.policy-section p,
.policy-section li { font-size: 16px; color: var(--text-secondary); line-height: 1.7; }
.policy-section ul { padding-left: 20px; margin-top: 8px; }
.policy-section li { margin-bottom: 6px; }
.highlight-box {
  background: #EDF6E9;
  border-left: 4px solid #357A45;
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  margin: 0 0 16px;
  color: #2E6634;
  font-size: 15px;
  font-weight: 500;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 13px;
}
footer a { color: var(--text-secondary); text-decoration: none; }
footer a:hover { color: var(--accent); }
.footer-links { display: flex; justify-content: center; gap: 24px; margin-bottom: 12px; }

/* ── Language sections ── */
[data-lang="en"] { display: none; }

/* ── Responsive ── */
@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  .hero .tagline { font-size: 16px; }
  section h2 { font-size: 22px; }
  .card-grid { grid-template-columns: 1fr; }
  .contact-box { padding: 28px 20px; }
  .policy-section h2 { font-size: 19px; }
  .nav-inner { padding: 0 16px; }
  main { padding: 40px 16px 60px; }
}