:root {
    --primary-blue: #2563eb;
    --primary-blue-dark: #1d4ed8;
    --primary-blue-light: #3b82f6;
    --primary-blue-ultra-light: #dbeafe;
    --accent-orange: #f97316;
    --accent-orange-dark: #ea580c;
    --accent-orange-light: #fed7aa;
    --text-dark: #0f172a;
    --text-medium: #334155;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --white: #ffffff;
    --light-gray: #f8fafc;
    --medium-gray: #f1f5f9;
    --border-color: #e2e8f0;
    --navy: #0f172a;
    --success-green: #10b981;
    --warning-yellow: #f59e0b;
    --danger-red: #ef4444;
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-heavy: rgba(0, 0, 0, 0.15);
    --gradient-blue: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --sidebar-width: 280px;
    --topbar-height: 70px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--light-gray);
    color: var(--text-dark);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-dark);
}

p {
    line-height: 1.6;
    color: var(--text-light);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: var(--gradient-blue);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: var(--white);
    color: var(--text-medium);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--light-gray);
}

.btn-danger {
    background: var(--danger-red);
    color: var(--white);
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

.btn-success {
    background: var(--success-green);
    color: var(--white);
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-medium);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.875rem;
    transition: border-color 0.3s ease;
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Utility Classes */
.text-primary { color: var(--primary-blue) !important; }
.text-success { color: var(--success-green) !important; }
.text-warning { color: var(--warning-yellow) !important; }
.text-danger { color: var(--danger-red) !important; }
.text-orange { color: var(--accent-orange) !important; }

.text-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
}

.text-link:hover {
    text-decoration: underline;
}

/* Loading */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.loading-spinner {
    text-align: center;
    color: var(--primary-blue);
}

.loading-spinner i {
    font-size: 2rem;
    margin-bottom: 1rem;
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}