/* ========================================
   RLFILES - Modern Dark Mode Design (Default Dark)
   ======================================== */

:root {
    /* Colors */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    
    /* Dark Mode Palette (Always Dark) */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    
    /* Text */
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    /* Borders & Shadows */
    --border: #334155;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.5);
    
    /* Border Radius */
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a1f35 100%);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========================================
   NAVBAR
   ======================================== */

.navbar {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.8) 100%);
    border-bottom: 2px solid var(--primary);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -1px;
}

/* ========================================
   FORMS
   ======================================== */

.form-label {
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.form-control,
.form-select,
textarea {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-control:focus,
.form-select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(15, 23, 42, 0.8);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-text {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ========================================
   BADGES
   ======================================== */

.badge {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: #86efac;
    border: 1px solid rgba(16, 185, 129, 0.5);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.5);
}

/* ========================================
   CARDS & BUTTONS
   ======================================== */

.card {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(51, 65, 85, 0.3) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    background: linear-gradient(135deg, rgba(51, 65, 85, 0.6) 0%, rgba(51, 65, 85, 0.4) 100%);
}

.card-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 1rem;
    margin: -1.5rem -1.5rem 1rem -1.5rem;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    font-weight: 600;
}

.card-body {
    padding: 1rem;
}

.card-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 0.95rem;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, #7c3aed 100%);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

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

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

.btn-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.5);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.3);
    border-color: #fca5a5;
}

.btn-success {
    background: rgba(16, 185, 129, 0.2);
    color: #86efac;
    border: 1px solid rgba(16, 185, 129, 0.5);
}

.btn-success:hover {
    background: rgba(16, 185, 129, 0.3);
    border-color: #86efac;
}

.btn-info {
    background: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
    border: 1px solid rgba(59, 130, 246, 0.5);
}

.btn-info:hover {
    background: rgba(59, 130, 246, 0.3);
    border-color: #93c5fd;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-outline-light {
    background: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-secondary);
}

.btn-outline-light:hover {
    background: var(--text-secondary);
    color: var(--bg-primary);
}

/* ========================================
   GALLERY GRID
   ======================================== */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(51, 65, 85, 0.3) 100%);
    border: 1px solid var(--border);
}

.gallery-item:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
    border-color: var(--primary);
}

.gallery-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
    transition: var(--transition);
    display: block;
}

.gallery-item:hover .gallery-image {
    transform: scale(1.08);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.8) 100%);
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-info {
    padding: 1rem;
}

.gallery-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.gallery-date {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ========================================
   MODAL
   ======================================== */

.modal-content {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.modal-header {
    border-bottom: 1px solid var(--border);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
}

.modal-title {
    color: var(--text-primary);
    font-weight: 700;
}

.btn-close {
    filter: invert(1) brightness(1.2);
}

/* ========================================
   ALERTS
   ======================================== */

.alert {
    border-radius: var(--radius-lg);
    border: 1px solid;
    padding: 1rem;
    background-position: 1rem center;
    margin-bottom: 1rem;
}

.alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(16, 185, 129, 0.05) 100%);
    border-color: rgba(16, 185, 129, 0.5);
    color: #86efac;
}

.alert-danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(239, 68, 68, 0.05) 100%);
    border-color: rgba(239, 68, 68, 0.5);
    color: #fca5a5;
}

.alert-info {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0.05) 100%);
    border-color: rgba(59, 130, 246, 0.5);
    color: #93c5fd;
}

.alert-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(245, 158, 11, 0.05) 100%);
    border-color: rgba(245, 158, 11, 0.5);
    color: #fcd34d;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   EMPTY STATE
   ======================================== */

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.6;
}

/* ========================================
   TABLES
   ======================================== */

.table {
    color: var(--text-primary);
    border-collapse: collapse;
    width: 100%;
}

.table thead {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-bottom: 2px solid var(--primary);
}

.table thead th {
    padding: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.table tbody td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.table tbody tr:hover {
    background: rgba(99, 102, 241, 0.05);
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .navbar-nav {
        gap: 1rem;
    }

    .container-fluid {
        padding: 1rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }

    .gallery-item {
        border-radius: var(--radius);
    }

    .gallery-image {
        height: 180px;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 1rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 0.75rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

/* ========================================
   SCROLLBAR
   ======================================== */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-hover);
}