:root {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --border-color: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #2563eb;
    --green: #16a34a;
    --yellow: #ca8a04;
    --purple: #9333ea;
    --red: #dc2626;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background-color: var(--bg-main); color: var(--text-main); min-height: 100vh; display: flex; flex-direction: column; }

header.app-header { background: var(--bg-card); border-bottom: 1px solid var(--border-color); padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; }
.header-title { font-size: 1.25rem; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.user-info { display: flex; align-items: center; gap: 15px; font-size: 0.9rem; color: var(--text-muted); }

.main-container { padding: 2rem; flex: 1; max-width: 1400px; width: 100%; margin: 0 auto; }
.card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 1.5rem; margin-bottom: 1.5rem; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.2); }
h2, h3 { margin-bottom: 1rem; color: var(--text-main); }

table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
th, td { padding: 0.75rem; text-align: left; border-bottom: 1px solid var(--border-color); font-size: 0.9rem; }
th { background-color: rgba(255,255,255,0.03); color: var(--text-muted); font-weight: 600; }

input, select, textarea { width: 100%; padding: 0.75rem; background: var(--bg-main); border: 1px solid var(--border-color); color: var(--text-main); border-radius: 4px; margin-bottom: 1rem; }
button { background: var(--accent); color: white; border: none; padding: 0.75rem 1.5rem; border-radius: 4px; cursor: pointer; font-weight: 600; transition: background 0.2s; }
button:hover { opacity: 0.9; }

.badge { padding: 0.25rem 0.75rem; border-radius: 9999px; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; display: inline-block; }
.badge-green { background: rgba(22, 163, 74, 0.2); color: #4ade80; border: 1px solid var(--green); }
.badge-yellow { background: rgba(202, 138, 4, 0.2); color: #facc15; border: 1px solid var(--yellow); }
.badge-purple { background: rgba(147, 51, 234, 0.2); color: #c084fc; border: 1px solid var(--purple); }
.badge-red { background: rgba(220, 38, 38, 0.2); color: #f87171; border: 1px solid var(--red); }

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