:root {
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    --card-bg: rgba(30, 41, 59, 0.8);
    --card-border: rgba(255, 255, 255, 0.1);
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --success: #10b981;
    --success-hover: #059669;
    --warning: #f59e0b;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --input-bg: rgba(15, 23, 42, 0.6);
    --input-border: #334155;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Auth Page Body & Card */
.auth-body {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.auth-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}

.auth-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
    text-align: center;
}

/* Header & Navbar */
.navbar {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: #a5b4fc;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.user-badge {
    font-size: 13px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--card-border);
}

/* Container & Card Base */
.container {
    max-width: 1200px;
    margin: 32px auto;
    padding: 0 24px;
    width: 100%;
    flex: 1;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.card-title {
    font-size: 20px;
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-success:hover {
    background: var(--success-hover);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-danger:hover {
    background: var(--danger-hover);
}

.btn-secondary {
    background: #334155;
    color: #fff;
}
.btn-secondary:hover {
    background: #475569;
}

.btn-block {
    width: 100%;
}

/* Forms Base */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

input[type="text"], input[type="password"], input[type="date"], input[type="number"], select, textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s ease;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 16px;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid var(--danger);
    color: #fca5a5;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid var(--warning);
    color: #fde68a;
}

/* Modals Base */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.modal-card {
    background: #1e293b;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    width: 100%;
    max-width: 600px;
    box-shadow: var(--shadow);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
}

.hidden {
    display: none !important;
}

.flex-row {
    display: flex;
    gap: 12px;
    align-items: center;
}