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

/* ── Apple HIG: Light Standard ── */
:root {
  --apple-red:    #FF383C;
  --apple-orange: #FF8D28;
  --apple-yellow: #FFCC00;
  --apple-green:  #34C759;
  --apple-mint:   #00C8B3;
  --apple-teal:   #00C3D0;
  --apple-cyan:   #00C0E8;
  --apple-blue:   #0088FF;
  --apple-indigo: #6155F5;
  --apple-purple: #CB30E0;
  --apple-pink:   #FF2D55;
  --apple-brown:  #AC7F5E;

  --bg:           #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-tertiary:  #ffffff;
  --bg-info:      #e5f0ff;
  --bg-danger:    #fff0f0;
  --text:         #000000;
  --text-secondary: rgba(60,60,67,0.6);
  --text-tertiary:  rgba(60,60,67,0.3);
  --text-info:    var(--apple-blue);
  --text-danger:  var(--apple-red);
  --border:       rgba(60,60,67,0.18);
  --border-md:    rgba(60,60,67,0.3);
  --border-strong: rgba(60,60,67,0.45);
  --accent:       var(--apple-blue);
  --accent-bg:    rgba(0, 136, 255, 0.08);
  --radius:       8px;
  --radius-lg:    12px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ── Apple HIG: Light High Contrast ── */
html[data-contrast="high"] {
  --apple-red:    #E9152D;
  --apple-orange: #C55300;
  --apple-yellow: #A16A00;
  --apple-green:  #008932;
  --apple-mint:   #008575;
  --apple-teal:   #008198;
  --apple-cyan:   #007EAE;
  --apple-blue:   #1E6EF4;
  --apple-indigo: #564ADE;
  --apple-purple: #B02FC2;
  --apple-pink:   #E7124D;
  --apple-brown:  #956D51;
}

/* ── Apple HIG: Dark Standard ── */
html[data-theme="dark"] {
  --apple-red:    #FF4245;
  --apple-orange: #FF9230;
  --apple-yellow: #FFD600;
  --apple-green:  #30D158;
  --apple-mint:   #00DAC3;
  --apple-teal:   #00D2E0;
  --apple-cyan:   #3CD3FE;
  --apple-blue:   #0091FF;
  --apple-indigo: #6D7CFF;
  --apple-purple: #DB34F2;
  --apple-pink:   #FF375F;
  --apple-brown:  #B78A66;

  --bg:           #1c1c1e;
  --bg-secondary: #2c2c2e;
  --bg-tertiary:  #000000;
  --bg-info:      #00254a;
  --bg-danger:    #3a0010;
  --text:         #ffffff;
  --text-secondary: rgba(235,235,245,0.6);
  --text-tertiary:  rgba(235,235,245,0.3);
  --border:       rgba(255,255,255,0.12);
  --border-md:    rgba(255,255,255,0.22);
  --border-strong: rgba(255,255,255,0.35);
  --accent-bg:    rgba(0, 145, 255, 0.1);
}

/* ── Apple HIG: Dark High Contrast ── */
html[data-theme="dark"][data-contrast="high"] {
  --apple-red:    #FF6165;
  --apple-orange: #FFA056;
  --apple-yellow: #FEDF43;
  --apple-green:  #4AD968;
  --apple-mint:   #54DFCB;
  --apple-teal:   #3BDDEC;
  --apple-cyan:   #6DD9FF;
  --apple-blue:   #5CB8FF;
  --apple-indigo: #A7AAFF;
  --apple-purple: #EA8DFF;
  --apple-pink:   #FF8AC4;
  --apple-brown:  #DBA679;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-tertiary);
  color: var(--text);
  min-height: 100vh;
}

/* ── Site header ── */
.site-header {
  height: 52px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 0.5px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg-tertiary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 10;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text);
  flex-shrink: 0;
}

.logo-mark {
  width: 28px;
  height: 28px;
  background: var(--text);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-mark svg { fill: var(--bg-tertiary); }

.logo-name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

.logo-tld {
  font-weight: 400;
  color: var(--text-secondary);
}

.site-header-actions {
  margin-left: auto;
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ── Theme toggles (shared across all pages) ── */
.toggle-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 12px;
  font-family: var(--font-sans);
  border: 0.5px solid var(--border-md);
  border-radius: 20px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.toggle-btn:hover { background: var(--bg); color: var(--text); }
.toggle-btn.on { background: var(--text); color: var(--bg-tertiary); border-color: transparent; }

.toggle-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.5;
  flex-shrink: 0;
}
.toggle-btn.on .toggle-dot { opacity: 1; }

/* ── Responsive ── */
@media (max-width: 600px) {
  .site-header { padding: 0 20px; }
}