/* iOS skin — systemGroupedBackground / systemBlue / SF */
:root {
  --bg: #F2F2F7;
  --panel: #FFFFFF;
  --panel2: #FAFAFC;
  --border: rgba(60,60,67,0.18);
  --accent: #007AFF;
  --accent-dim: #0A84FF;
  --accent-soft: rgba(0,122,255,0.12);
  --text: #000000;
  --muted: rgba(60,60,67,0.60);
  --muted-2: rgba(60,60,67,0.30);
  --danger: #FF3B30;
  --success: #34C759;
  --orange: #FF9500;
  --purple: #AF52DE;
  --fill-1: rgba(120,120,128,0.12);
  --fill-2: rgba(120,120,128,0.16);
  --shadow-card: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-pop: 0 12px 32px rgba(0,0,0,0.14), 0 2px 6px rgba(0,0,0,0.06);
  --r-card: 12px;
  --r-field: 10px;
  --r-pill: 980px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --panel: #1C1C1E;
    --panel2: #2C2C2E;
    --border: rgba(84,84,88,0.55);
    --accent: #0A84FF;
    --accent-dim: #409CFF;
    --accent-soft: rgba(10,132,255,0.18);
    --text: #FFFFFF;
    --muted: rgba(235,235,245,0.60);
    --muted-2: rgba(235,235,245,0.30);
    --fill-1: rgba(118,118,128,0.24);
    --fill-2: rgba(118,118,128,0.36);
    --shadow-card: 0 1px 2px rgba(0,0,0,0.4);
    --shadow-pop: 0 12px 32px rgba(0,0,0,0.6), 0 2px 6px rgba(0,0,0,0.35);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
html { color-scheme: light dark; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px; line-height: 1.4; letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: none;
  background: var(--fill-1);
  color: var(--text);
  padding: 6px 12px;
  border-radius: var(--r-pill);
  font: inherit;
  font-size: 13px; font-weight: 500;
  cursor: pointer;
  transition: background .15s ease, opacity .15s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { background: var(--fill-2); }
.btn:active { opacity: 0.7; }
.btn.primary { background: var(--accent); color: #fff; font-weight: 600; }
.btn.primary:hover { background: var(--accent-dim); }
.btn.success { background: var(--success); color: #fff; font-weight: 600; }
.btn.ghost { background: transparent; }
.btn.ghost:hover { background: var(--fill-1); }
.btn.active { background: var(--accent); color: #fff; }
.btn.hidden { display: none; }
.btn.sm { padding: 4px 10px; font-size: 13px; }
.btn.block { width: 100%; justify-content: center; padding: 11px; font-size: 14px; }

.topnav { display: flex; align-items: center; gap: 14px; font-size: 13px; }
.topnav a { color: var(--muted); text-decoration: none; }
.topnav a:hover { color: var(--accent); }
.topnav .brand { font-weight: 700; color: var(--text); letter-spacing: -0.01em; font-size: 15px; }
.topnav .right { margin-left: auto; }

.card-shell {
  background: var(--panel);
  border: 0.5px solid var(--border);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  padding: 24px;
}

.pill-tag {
  display: inline-block; padding: 3px 10px; border-radius: var(--r-pill);
  font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
}
.pill-tag.free { background: var(--fill-1); color: var(--muted); }
.pill-tag.pro  { background: var(--accent); color: #fff; }