:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --bg-dark: #111827;
    --bg-panel: #1F2937;
    --text-light: #F9FAFB;
    --text-muted: #9CA3AF;
    --border: #374151;
    --danger: #EF4444;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
body { background-color: var(--bg-dark); color: var(--text-light); display: flex; min-height: 100vh; }

/* Auth Layout */
.auth-container { display: flex; justify-content: center; align-items: center; width: 100%; height: 100vh; }
.auth-card { background: var(--bg-panel); padding: 2.5rem; border-radius: 12px; width: 100%; max-width: 400px; box-shadow: 0 10px 25px rgba(0,0,0,0.5); border: 1px solid var(--border); }
.auth-card h2 { margin-bottom: 1.5rem; text-align: center; color: white; }
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; color: var(--text-muted); }
.form-control { width: 100%; padding: 0.75rem; background: var(--bg-dark); border: 1px solid var(--border); border-radius: 6px; color: white; transition: 0.3s; }
.form-control:focus { border-color: var(--primary); outline: none; }
.btn { width: 100%; padding: 0.75rem; background: var(--primary); color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: 600; transition: 0.3s; }
.btn:hover { background: var(--primary-hover); }
.auth-links { margin-top: 1rem; text-align: center; font-size: 0.85rem; }
.auth-links a { color: var(--primary); text-decoration: none; }

/* Dashboard Layout */
.sidebar { width: 260px; background: var(--bg-panel); height: 100vh; padding: 1.5rem; border-right: 1px solid var(--border); position: fixed; }
.sidebar-logo { font-size: 1.5rem; font-weight: bold; margin-bottom: 2rem; color: white; text-align: center; }
.menu-group { margin-bottom: 1.5rem; }
.menu-label { font-size: 0.75rem; text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.5rem; letter-spacing: 1px; }
.menu-item { display: block; padding: 0.75rem 1rem; color: var(--text-light); text-decoration: none; border-radius: 6px; margin-bottom: 0.25rem; transition: 0.2s; }
.menu-item:hover { background: var(--bg-dark); color: var(--primary); }
.menu-item.active { background: var(--primary); color: white; }

.main-content { margin-left: 260px; padding: 2rem; width: calc(100% - 260px); }
.card { background: var(--bg-panel); padding: 1.5rem; border-radius: 8px; border: 1px solid var(--border); }