/* Contrast Grid Matrix — style.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --primary: #8b5cf6;
  --primary-dim: rgba(139, 92, 246, 0.12);
  --bg: #0f172a;
  --bg-card: rgba(15, 23, 42, 0.92);
  --surface: rgba(30, 41, 59, 0.6);
  --border: rgba(139, 92, 246, 0.1);
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --text-muted: #475569;
  --success: #10b981;
  --warn: #f59e0b;
  --error: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.25s ease;
}

body.light {
  --bg: #f8fafc;
  --bg-card: rgba(255,255,255,0.95);
  --surface: rgba(226,232,240,0.6);
  --border: rgba(139, 92, 246, 0.12);
  --text: #1e293b;
  --text-dim: #64748b;
  --text-muted: #94a3b8;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', system-ui, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; transition: background 0.3s, color 0.3s; }

.header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: var(--bg-card); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100;
  flex-wrap: wrap; gap: 8px;
}
.header-left { display: flex; align-items: center; gap: 10px; }
.logo { width: 34px; height: 34px; background: linear-gradient(135deg, var(--primary), #a78bfa); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 16px; }
.header h1 { font-size: 15px; font-weight: 600; background: linear-gradient(135deg, var(--primary), #c4b5fd); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.header-right { display: flex; gap: 8px; }

.btn {
  padding: 7px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-family: 'Inter', sans-serif;
  font-size: 12px; font-weight: 500; cursor: pointer; transition: var(--transition);
}
.btn:hover { border-color: var(--primary); }
.btn-primary { background: linear-gradient(135deg, var(--primary), #7c3aed); border-color: transparent; color: #fff; }
.btn-primary:hover { filter: brightness(1.15); }
.btn-sm { padding: 5px 10px; font-size: 11px; }

.input {
  padding: 7px 10px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-family: 'JetBrains Mono', monospace;
  font-size: 12px; outline: none; width: 100px;
}
.input:focus { border-color: var(--primary); }

.app-container { max-width: 1200px; margin: 0 auto; padding: 16px; }

.color-input-section { margin-bottom: 16px; }
.color-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.color-chip {
  display: flex; align-items: center; gap: 6px; padding: 4px 10px 4px 4px;
  border-radius: 20px; border: 1px solid var(--border); background: var(--surface);
  font-size: 11px; cursor: default;
}
.color-chip-swatch { width: 20px; height: 20px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.1); }
.color-chip-remove { cursor: pointer; opacity: 0.5; font-size: 10px; margin-left: 4px; }
.color-chip-remove:hover { opacity: 1; }

.color-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.add-color { display: flex; gap: 6px; align-items: center; }
.add-color input[type="color"] { width: 34px; height: 34px; border: 1px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; background: none; padding: 2px; }
.presets { display: flex; gap: 6px; }

.matrix-section { margin-top: 16px; }
.matrix-info { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.info-badge { padding: 4px 10px; border-radius: 4px; font-size: 10px; font-weight: 600; }
.pass-aaa { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.pass-aa { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.pass-aa-large { background: rgba(245, 158, 11, 0.15); color: var(--warn); }
.fail { background: rgba(239, 68, 68, 0.15); color: var(--error); }

.matrix-wrapper { overflow-x: auto; }
.matrix-table { border-collapse: separate; border-spacing: 3px; width: 100%; }
.matrix-table th, .matrix-table td {
  padding: 8px; text-align: center; border-radius: 6px;
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  min-width: 80px; transition: var(--transition);
}
.matrix-table th { background: var(--surface); color: var(--text-dim); font-weight: 600; font-size: 10px; }
.matrix-table td { cursor: pointer; position: relative; }
.matrix-table td:hover { transform: scale(1.05); z-index: 2; }

.cell-ratio { font-weight: 600; font-size: 13px; display: block; }
.cell-level { font-size: 9px; font-weight: 700; letter-spacing: 0.5px; }

.cell-aaa { border: 2px solid var(--success); }
.cell-aa { border: 2px solid #3b82f6; }
.cell-aa-large { border: 2px solid var(--warn); }
.cell-fail { border: 2px solid var(--error); opacity: 0.7; }
.cell-same { background: var(--surface) !important; opacity: 0.3; }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 20px; font-size: 13px; color: var(--text);
  opacity: 0; transition: all 0.3s ease; z-index: 300; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface); border-radius: 3px; }

@media (max-width: 600px) { .add-color { flex-wrap: wrap; } }