:root {
  --bg: #0a0e14;
  --surface: #121821;
  --surface-2: #1a2230;
  --fg: #e4e7eb;
  --muted: #8b9bb4;
  --border: color-mix(in oklab, var(--fg) 10%, transparent);
  --accent: #10b981;
  --accent-fg: #0a0e14;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  padding: 1.5rem;
  background-image: radial-gradient(circle at 100% 0%, rgba(16, 185, 129, 0.05) 0%, transparent 20%);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
  backdrop-filter: blur(10px);
}

.logo { font-weight: 700; font-size: 1.25rem; color: var(--accent); letter-spacing: -0.5px; display: flex; align-items: center; gap: 0.5rem; }
.logo::before { content: '✦'; color: var(--accent); }
nav { display: flex; gap: 0.5rem; }
nav a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: 0.9rem; padding: 0.5rem 0.75rem; border-radius: 6px; transition: all 0.2s; }
nav a:hover { color: var(--fg); background: var(--surface); }
nav a.active { color: var(--fg); background: var(--surface-2); box-shadow: 0 1px 0 rgba(255,255,255,0.05) inset; }

.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: border-color 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}
.card:hover { border-color: rgba(16, 185, 129, 0.3); box-shadow: 0 4px 20px rgba(0,0,0,0.2); }
.card h3 { font-size: 0.9rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 0.5rem; }
.card h2 { font-size: 1.5rem; margin-bottom: 1rem; }
.card p { color: var(--muted); font-size: 0.9rem; }

.metric { font-size: 2rem; font-weight: 700; color: var(--fg); }

.status-badge { display: inline-flex; align-items: center; gap: 0.25rem; padding: 0.25rem 0.5rem; border-radius: 4px; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; }
.status-healthy { background: rgba(16, 185, 129, 0.15); color: var(--accent); }
.status-warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.status-danger { background: rgba(239, 68, 68, 0.15); color: var(--danger); }

.alert { border-left: 4px solid; padding: 1rem; border-radius: 6px; margin-bottom: 1rem; background: var(--surface-2); }
.alert-warning { border-color: var(--warning); }
.alert-danger { border-color: var(--danger); }
.alert h4 { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.5rem; }
.alert p { margin-bottom: 0.5rem; }
.alert .action { font-size: 0.85rem; font-weight: 600; color: var(--fg); }

.form-group { margin-bottom: 1rem; }
label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 0.25rem; }
input, select { width: 100%; padding: 0.75rem; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; color: var(--fg); font-family: inherit; transition: border-color 0.2s; }
input:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1); }

button { background: var(--accent); color: var(--accent-fg); border: none; padding: 0.75rem 1.5rem; border-radius: 6px; font-weight: 600; cursor: pointer; transition: transform 0.1s, box-shadow 0.2s; }
button:hover { box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2); }
button:active { transform: scale(0.98); }
button.secondary { background: var(--surface-2); color: var(--fg); border: 1px solid var(--border); }
button.secondary:hover { box-shadow: none; background: var(--surface); }

.health-bar { width: 100%; height: 8px; background: var(--bg); border-radius: 4px; margin-top: 0.5rem; overflow: hidden; }
.health-fill { height: 100%; background: var(--accent); border-radius: 4px; transition: width 0.8s cubic-bezier(0.22, 1, 0.36, 1), background 0.5s; }
.health-fill.warning { background: var(--warning); }
.health-fill.danger { background: var(--danger); }

.assumption-list, .reason-list { list-style: none; font-size: 0.9rem; color: var(--muted); }
.assumption-list li, .reason-list li { margin-bottom: 0.5rem; padding-left: 1.5rem; position: relative; }
.reason-list li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); }
.reason-list li.warning::before { content: '⚠'; color: var(--warning); }
.assumption-list li::before { content: '•'; position: absolute; left: 0; color: var(--muted); font-weight: bold; }

/* --- Premium Animations --- */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }
@keyframes pulseGlow { 0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); } 70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); } 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); } }

.fade-in { animation: fadeIn 0.4s ease-out forwards; }
.slide-in { animation: slideInRight 0.4s ease-out forwards; }
.pulse-dot { width: 8px; height: 8px; background: var(--accent); border-radius: 50%; display: inline-block; animation: pulseGlow 2s infinite; }

.chart-container { position: relative; height: 200px; width: 100%; margin-top: 1rem; }
.hidden { display: none; }