/* ==== Root Variables ==== */
:root {
    --primary: #0f4c81;
    --primary-dark: #0a3a63;
    --primary-light: #1a6bb5;
    --secondary: #1e3a5f;
    --accent: #00a8e8;
    --success: #28a745;
    --warning: #f59e0b;
    --danger: #dc3545;
    --info: #17a2b8;
    --light: #f8f9fa;
    --dark: #1a1a2e;
    --gray-100: #f7f8fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-500: #6c757d;
    --gray-700: #495057;
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-dark: linear-gradient(135deg, #0d1b2a 0%, #1b263b 100%);
    --gradient-accent: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.12);
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
}

/* ==== Base Styles ==== */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-100);
    color: var(--dark);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

main {
    flex: 1;
}

/* ==== Gradient Backgrounds ==== */
.bg-gradient-primary {
    background: var(--gradient-primary);
}

.bg-gradient-dark {
    background: var(--gradient-dark);
}

/* ==== Navigation ==== */
.navbar {
    padding: 0.875rem 0;
    box-shadow: var(--shadow);
    background: var(--gradient-primary) !important;
}

.navbar-brand {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.navbar-dark .nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: all 0.2s ease;
}

.navbar-dark .nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

/* ==== Cards ==== */
.card {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    background: #fff;
}

.card:hover {
    box-shadow: var(--shadow);
}

.card-header {
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
    font-weight: 600;
    color: var(--dark);
}

/* ==== Buttons ==== */
.btn {
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius);
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover {
    background: var(--primary);
    border-color: var(--primary);
}

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

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

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.05rem;
}

/* ==== Forms ==== */
.form-control, .form-select {
    border-radius: var(--radius);
    border: 1px solid var(--gray-300);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.15);
}

.form-label {
    font-weight: 500;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.form-text {
    color: var(--gray-500);
    font-size: 0.875rem;
}

textarea.form-control {
    min-height: 120px;
}

/* ==== Hero Section ==== */
.hero-section {
    background: var(--gradient-primary);
    color: #fff;
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-section > * {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* ==== Feature Cards ==== */
.feature-card {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: #fff;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--dark);
}

/* ==== Stats Cards ==== */
.stat-card {
    padding: 1.5rem;
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    color: var(--gray-500);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.5rem;
}

/* ==== Footer ==== */
.footer-dark {
    background: var(--gradient-dark);
    color: rgba(255, 255, 255, 0.8);
}

/* ==== Page Header ==== */
.page-header {
    background: var(--gradient-primary);
    color: #fff;
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
}

.page-subtitle {
    opacity: 0.9;
    margin: 0.5rem 0 0;
}

/* ==== Success Page ==== */
.success-icon {
    width: 120px;
    height: 120px;
    background: var(--success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    font-size: 3rem;
    color: #fff;
    animation: bounceIn 0.6s ease;
}

@keyframes bounceIn {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

/* ==== Admin Styles ==== */
.admin-sidebar {
    background: var(--gradient-dark);
    min-height: calc(100vh - 56px);
    padding: 1.5rem 0;
}

.admin-sidebar .nav-link {
    color: rgba(255, 255, 255, 0.75);
    padding: 0.75rem 1.5rem;
    border-radius: 0;
    transition: all 0.2s ease;
    font-weight: 500;
}

.admin-sidebar .nav-link:hover,
.admin-sidebar .nav-link.active {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.admin-sidebar .nav-link i {
    width: 24px;
}

.admin-content {
    padding: 2rem;
    background: var(--gray-100);
    min-height: calc(100vh - 56px);
}

/* ==== Tables ==== */
.table {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    margin-bottom: 0;
}

.table thead th {
    background: var(--gray-100);
    border-bottom: 2px solid var(--gray-200);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--gray-700);
    padding: 1rem;
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--gray-200);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ==== Badges ==== */
.badge {
    padding: 0.375rem 0.75rem;
    font-weight: 500;
    border-radius: var(--radius);
}

.badge-pending {
    background: rgba(245, 158, 11, 0.1);
    color: #b45309;
}

.badge-approved {
    background: rgba(40, 167, 69, 0.1);
    color: #1e7e34;
}

.badge-rejected {
    background: rgba(220, 53, 69, 0.1);
    color: #bd2130;
}

/* ==== Pagination ==== */
.pagination .page-link {
    border: 1px solid var(--gray-300);
    color: var(--dark);
    padding: 0.5rem 1rem;
    margin: 0 0.125rem;
    border-radius: var(--radius);
}

.pagination .page-link:hover {
    background: var(--gray-100);
    border-color: var(--gray-300);
}

.pagination .page-item.active .page-link {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* ==== Login Page ==== */
.login-container {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    max-width: 400px;
    width: 100%;
}

.login-header {
    text-align: center;
    padding: 2rem 2rem 1rem;
}

.login-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
    color: #fff;
}

/* ==== Utilities ==== */
.text-gradient {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-primary {
    color: var(--primary) !important;
}

.border-left-primary {
    border-left: 4px solid var(--primary);
}

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

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

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

/* ==== Pricing Cards ==== */
.card.border-primary {
    border: 2px solid var(--primary) !important;
}

.card-header.bg-gradient-primary {
    background: var(--gradient-primary) !important;
}

/* ==== CTA Card ==== */
.cta-card {
    background: var(--gradient-primary) !important;
    color: #fff !important;
    border: none;
    box-shadow: var(--shadow);
}

.cta-card p {
    color: rgba(255, 255, 255, 0.85);
}

.cta-card .btn-light {
    color: var(--primary-dark) !important;
    font-weight: 600;
}

/* ==== Alert Overrides ==== */
.alert-success {
    background: rgba(40, 167, 69, 0.1);
    border-color: rgba(40, 167, 69, 0.2);
    color: #1e7e34;
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    border-color: rgba(220, 53, 69, 0.2);
    color: #bd2130;
}

/* ==== Responsive ==== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-section {
        padding: 3rem 0;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .admin-sidebar {
        min-height: auto;
    }
}