:root {
    /* Color Palette - Modern & Premium */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #64748b;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --info: #0ea5e9;

    --background: #f8fafc;
    --surface: #ffffff;
    --surface-muted: #f1f5f9;

    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-on-primary: #ffffff;

    --border: #e2e8f0;
    --border-focus: #3b82f6;

    /* Spacing System */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;

    /* Shadows - Layered & Multi-dimensional */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* ... existing styles ... */

    --radius-lg: 0.75rem;
    --radius-full: 9999px;
}

/* Alert Premium Utilities */
.alert-premium {
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-premium-success {
    border-left: 4px solid var(--success);
}

.alert-premium-danger {
    border-left: 4px solid var(--danger);
}

.alert-premium-info {
    border-left: 4px solid var(--info);
}

.alert-premium-warning {
    border-left: 4px solid var(--accent);
}

/* Global Reset & Base Styles */
body {
    background-color: var(--background);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    margin: 0;
}

/* Glassmorphism Effect */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Premium Card */
.premium-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    padding: var(--space-lg);
}

.premium-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Modern Button */
.btn-premium {
    background: var(--primary);
    color: var(--text-on-primary);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    border: none;
    font-weight: 600;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.btn-premium:hover {
    background: var(--primary-hover);
    color: var(--text-on-primary);
    box-shadow: var(--shadow-md);
}

/* Modern Input */
.input-modern {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-modern:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Status Badges */
.badge-premium {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-incomplete {
    background: #fef3c7;
    color: #92400e;
}

.badge-complete {
    background: #dcfce7;
    color: #166534;
}

.badge-active {
    background: #dbeafe;
    color: #1e40af;
}