/* ══════════════════════════════════════════════════════════
   Layout — Structure, Nav, Containers
   Clean, minimal, lots of breathing room
   ══════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; }

body {
  font-family: var(--font);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

/* ── Nav ── */
nav {
  position: sticky; top: 0; z-index: 100; height: 56px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
nav .inner {
  max-width: 1080px; margin: 0 auto; height: 100%;
  display: flex; align-items: center; padding: 0 var(--s6); gap: var(--s3);
}
nav .coin { width: 28px; height: 28px; flex-shrink: 0; }
nav .wordmark { font-size: 0.82rem; font-weight: 600; color: var(--text); letter-spacing: -0.01em; }
nav .wordmark span { display: block; font-size: 0.65rem; font-weight: 400; color: var(--text-3); margin-top: -2px; }
nav .spacer { flex: 1; }
#save-indicator { font-size: 0.72rem; color: var(--text-3); display: flex; align-items: center; gap: 6px; }
#save-indicator .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--text-3); }
#save-indicator .dot.saving { background: var(--cot); animation: pulse 1s infinite; }
#save-indicator .dot.saved { background: var(--green); }
#save-indicator .dot.error { background: var(--red); }

/* ── Hero ── */
.hero {
  background: linear-gradient(160deg, var(--cot-50) 0%, var(--bg) 60%);
  padding: var(--s16) var(--s6) var(--s12);
  text-align: center;
}
.hero h2 { font-size: 2rem; font-weight: 800; color: var(--text); letter-spacing: -0.03em; margin-bottom: var(--s2); }
.hero p { font-size: 1rem; color: var(--text-2); max-width: 520px; margin: 0 auto; line-height: 1.6; }

/* ── Containers ── */
.container { max-width: 680px; margin: 0 auto; padding: var(--s8) var(--s5) var(--s16); }
.container.wide { max-width: 1000px; }
.container.narrow { max-width: 560px; }

/* ── Cards ── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: var(--s6); margin-bottom: var(--s4);
}
.card h2 { font-size: 1.1rem; font-weight: 700; color: var(--text); margin-bottom: var(--s1); letter-spacing: -0.01em; }
.card h3 { font-size: 0.95rem; font-weight: 600; color: var(--text); margin-bottom: var(--s1); }
.card p { font-size: 0.875rem; color: var(--text-2); margin-bottom: var(--s3); line-height: 1.6; }
.divider { height: 1px; background: var(--border); margin: var(--s5) 0; }

/* ── Utility ── */
.hidden { display: none !important; }
input[type=file] { display: none; }

/* ── Animations ── */
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
@keyframes slideIn { from { opacity: 0; transform: translateX(16px); } to { opacity: 1; transform: translateX(0); } }
@keyframes scaleIn { 0% { transform: scale(0); } 60% { transform: scale(1.08); } 100% { transform: scale(1); } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
.fade-in { animation: fadeIn 0.3s var(--ease); }
.slide-in { animation: slideIn 0.3s var(--ease); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero h2 { font-size: 1.6rem; }
  .container { padding: var(--s5) var(--s4) var(--s12); }
  nav .wordmark span { display: none; }
}
@media (max-width: 480px) {
  .card { padding: var(--s5); border-radius: var(--r-md); }
  .hero { padding: var(--s10) var(--s4) var(--s8); }
}