/**
 * IPIU CMS - Main Stylesheet
 * 
 * Modern, responsive design for the IPIU CMS
 * Following best practices for CSS architecture
 */

/* ============================================================
   CSS Variables
   ============================================================ */
:root {
    /* Colors */
    --primary-color: #4a6fa5;
    --primary-dark: #3a5a8a;
    --primary-light: #6b8db8;
    --secondary-color: #6b4c9a;
    --secondary-dark: #5a3d82;
    --accent-color: #f0c040;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    
    /* Neutral Colors */
    --dark: #1a1a2e;
    --darker: #0f0f1a;
    --light: #f8f9fa;
    --lighter: #ffffff;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --gray-dark: #343a40;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-secondary: 'Playfair Display', Georgia, 'Times New Roman', serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    
    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

/* ============================================================
   Reset & Base Styles
   ============================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--dark);
    background: var(--lighter);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

/* ============================================================
   Utilities
   ============================================================ */
.text-primary-custom { color: var(--primary-color); }
.text-secondary-custom { color: var(--secondary-color); }
.bg-primary-custom { background: var(--primary-color); }
.bg-secondary-custom { background: var(--secondary-color); }

.gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

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

/* ============================================================
   Glassmorphism
   ============================================================ */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.glass-dark {
    background: rgba(26, 26, 46, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ============================================================
   Header & Navigation
   ============================================================ */
.header-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.header-glass.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-brand .brand-text {
    line-height: 1.2;
}

.navbar-brand .brand-text span {
    font-family: var(--font-secondary);
}

.nav-link {
    font-weight: 500;
    color: var(--dark) !important;
    padding: 0.5rem 1rem !important;
    transition: all var(--transition-normal);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color) !important;
}

/* Mega Menu */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 2rem;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: 1000;
    border-top: 3px solid var(--primary-color);
}

.nav-item:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mega-menu .mega-title {
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
    font-size: 1.1rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.mega-menu .mega-link {
    display: block;
    padding: 0.5rem 0;
    color: var(--gray);
    text-decoration: none;
    transition: all var(--transition-normal);
    font-weight: 400;
}

.mega-menu .mega-link:hover {
    color: var(--primary-color);
    padding-left: 0.5rem;
}

.mega-menu .mega-link i {
    width: 20px;
    color: var(--primary-color);
    margin-right: 0.5rem;
}

/* Login Button */
.login-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white !important;
    border: none;
    padding: 0.5rem 1.5rem !important;
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(74, 111, 165, 0.3);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(74, 111, 165, 0.4);
    color: white !important;
}

.login-btn::after {
    display: none !important;
}

/* User Avatar */
.user-avatar {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-color);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
    background: linear-gradient(135deg, var(--dark) 0%, #16213e 50%, #0f3460 100%);
    color: rgba(255, 255, 255, 0.8);
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-normal);
}

.footer a:hover {
    color: #fff;
    padding-left: 5px;
}

.footer .social-links a {
    opacity: 0.7;
    transition: all var(--transition-normal);
    display: inline-block;
}

.footer .social-links a:hover {
    opacity: 1;
    transform: translateY(-3px);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
    border-radius: 50px;
    padding: 0.6rem 1.5rem;
    font-weight: 600;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(74, 111, 165, 0.4);
    color: white;
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* ============================================================
   Cards
   ============================================================ */
.card {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.card-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
}

/* ============================================================
   Hero Slider
   ============================================================ */
.hero-slider .slide-wrapper {
    height: 90vh;
    min-height: 500px;
    position: relative;
    background-size: cover;
    background-position: center;
}

.hero-slider .slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
}

.hero-slider .slide-content {
    color: white;
    max-width: 700px;
}

.hero-slider .slide-subtitle {
    font-size: 1.2rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--primary-light);
    background: rgba(255, 255, 255, 0.1);
    padding: 0.3rem 1rem;
    border-radius: 50px;
    display: inline-block;
    margin-bottom: 1rem;
    backdrop-filter: blur(10px);
}

.hero-slider .slide-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-slider .slide-description {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.hero-slider .slide-btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    transition: all var(--transition-normal);
}

.hero-slider .slide-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(74, 111, 165, 0.4);
}

/* ============================================================
   Statistics
   ============================================================ */
.stat-item .stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.2;
}

.stat-item .stat-label {
    font-size: 1.1rem;
    color: var(--gray);
    font-weight: 500;
}

.stat-item .stat-icon-wrapper {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* ============================================================
   Sections
   ============================================================ */
.section-subtitle {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--primary-color);
    display: inline-block;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 1rem;
}

.section-text {
    font-size: 1.1rem;
    color: var(--gray);
    line-height: 1.8;
}

.bg-cover {
    background-size: cover;
    background-position: center;
    position: relative;
}

.bg-cover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
}

.bg-cover .container {
    position: relative;
    z-index: 1;
}

/* ============================================================
   Gallery
   ============================================================ */
.gallery-item .gallery-image-wrapper {
    position: relative;
    overflow: hidden;
    padding-top: 100%;
}

.gallery-item .gallery-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.gallery-item:hover .gallery-image {
    transform: scale(1.1);
}

.gallery-item .gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
    color: white;
    font-size: 2rem;
}

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

/* ============================================================
   Admin Layout
   ============================================================ */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

.admin-main {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
}

.admin-topbar {
    background: white;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--gray-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.admin-content {
    flex: 1;
    padding: 1.5rem;
    background: #f0f2f5;
}

.sidebar-toggle-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--dark);
    display: none;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
}

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

/* Admin Dashboard Cards */
.dashboard-card {
    background: white;
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-light);
    height: 100%;
}

.dashboard-card .card-header {
    background: none;
    border-bottom: 2px solid #f0f0f0;
    padding: 0 0 1rem 0;
    margin-bottom: 1rem;
}

.dashboard-card .card-header h5 {
    font-weight: 600;
    color: var(--dark);
}

/* Activity Items */
.activity-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-item .activity-icon {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.activity-item .activity-content {
    flex: 1;
}

.activity-item .activity-action {
    font-weight: 500;
    color: var(--dark);
}

.activity-item .activity-time {
    font-size: 0.8rem;
    color: var(--gray);
}

/* ============================================================
   Responsive Design
   ============================================================ */

/* Tablet */
@media (max-width: 991px) {
    .admin-main {
        margin-left: 0;
    }
    
    .sidebar-toggle-btn {
        display: block;
    }
    
    .hero-slider .slide-title {
        font-size: 2.5rem;
    }
    
    .hero-slider .slide-wrapper {
        height: 70vh;
        min-height: 400px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stat-item .stat-number {
        font-size: 2.5rem;
    }
    
    .navbar-collapse {
        background: rgba(255, 255, 255, 0.98);
        padding: 1rem;
        border-radius: var(--radius-md);
        margin-top: 1rem;
        box-shadow: var(--shadow-lg);
    }
    
    .mega-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding: 1rem;
        background: transparent;
        backdrop-filter: none;
        border-top: none;
        border-left: 3px solid var(--primary-color);
        margin: 0.5rem 0;
    }
    
    .nav-item:hover .mega-menu {
        transform: none;
    }
}

/* Mobile */
@media (max-width: 576px) {
    .hero-slider .slide-title {
        font-size: 1.8rem;
    }
    
    .hero-slider .slide-description {
        font-size: 1rem;
    }
    
    .hero-slider .slide-wrapper {
        height: 60vh;
        min-height: 350px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .stat-item .stat-number {
        font-size: 2rem;
    }
    
    .admin-content {
        padding: 1rem;
    }
    
    .dashboard-card {
        padding: 1rem;
    }
}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* ============================================================
   Scroll to Top Button
   ============================================================ */
#scrollTopBtn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    font-size: 1.2rem;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(74, 111, 165, 0.3);
    z-index: 999;
}

#scrollTopBtn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(74, 111, 165, 0.4);
}

/* ============================================================
   Print Styles
   ============================================================ */
@media print {
    .header-glass,
    .footer,
    #scrollTopBtn,
    .share-section,
    .page-navigation {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .container {
        max-width: 100% !important;
    }
    
    a {
        color: black !important;
        text-decoration: underline !important;
    }
}