/* Ultra Modern CSS for KKWIND College Website */

:root {
    --primary: #667eea;
    --secondary: #764ba2;
    --accent: #f093fb;
    --dark: #2c3e50;
    --light: #ecf0f1;
    --success: #00d4aa;
    --warning: #ffc107;
    --danger: #ff6b6b;
    --info: #17a2b8;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    --gradient-dark: linear-gradient(135deg, var(--dark) 0%, var(--gray-800) 100%);
    
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.15);
    --shadow-xl: 0 15px 40px rgba(0,0,0,0.2);
    
    --border-radius: 15px;
    --border-radius-sm: 10px;
    --border-radius-lg: 25px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Prompt', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: var(--white);
    overflow-x: hidden;
}

/* Hero Section */
.hero {
    min-height: 75vh;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    position: relative;
    
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.05)" points="0,0 1000,300 1000,1000 0,700"/></svg>');
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: white;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255,255,255,0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
    color: white;
}

/* Buttons */
.btn {
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    border: 2px solid transparent;
    font-size: 1rem;
    line-height: 1.5;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-outline-light {
    background: transparent;
    color: white;
    border-color: rgba(255,255,255,0.5);
}

.btn-outline-light:hover {
    background: white;
    color: var(--primary);
    border-color: white;
    transform: translateY(-3px);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
    background: white;
    height: 100%;
}

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

.card-img-top {
    height: 220px;
    object-fit: cover;
    transition: var(--transition);
}

.card:hover .card-img-top {
    transform: scale(1.05);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.card-text {
    color: var(--gray-600);
    margin-bottom: 1rem;
}

/* Sections */
.section {
    padding: 5rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.section-alt {
    background: var(--gray-100);
}

.section-dark {
    background: var(--gradient-dark);
    color: white;
}

.section-dark .section-title {
    color: white;
}

.section-dark .section-subtitle {
    color: rgba(255,255,255,0.8);
}

/* System Cards */
.system-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.system-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
}

.system-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.system-card:hover::before {
    transform: scaleX(1);
}

.system-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    color: inherit;
    text-decoration: none;
}

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

.system-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.system-description {
    color: var(--gray-600);
    font-size: 0.95rem;
}

/* News Grid */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.news-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

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

.news-image {
    position: relative;
    overflow: hidden;
    height: 200px;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.news-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.news-card:hover .news-overlay {
    opacity: 1;
}

.news-card:hover .news-image img {
    transform: scale(1.1);
}

.news-content {
    padding: 1.5rem;
}

.news-title {
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.news-title a {
    color: var(--dark);
    text-decoration: none;
    transition: var(--transition);
}

.news-title a:hover {
    color: var(--primary);
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-top: 1rem;
}

.news-date,
.news-views {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Carousel */
.carousel {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.carousel-item img {
    height: 500px;
    object-fit: cover;
    width: 100%;
}

.carousel-control-prev,
.carousel-control-next {
    width: 5%;
    opacity: 0.8;
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
    opacity: 1;
}

/* Loading Animation */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s ease;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255,255,255,0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.8s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .section {
        padding: 3rem 0;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .system-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-buttons .btn {
        width: auto;
        min-width: 160px;
    }
}

@media (max-width: 576px) {
    .hero {
        min-height: 80vh;
        padding: 2rem 0;
    }
    
    .section {
        padding: 2rem 0;
    }
    
    .section-header {
        margin-bottom: 2rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .carousel-item img {
        height: 300px;
    }
}

/* Utility Classes */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

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

.shadow-custom {
    box-shadow: var(--shadow-lg);
}

.border-radius-custom {
    border-radius: var(--border-radius);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

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

/* Documents Horizontal List */
.documents-list-horizontal {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.document-card-horizontal {
    background: white;
    border-radius: 10px;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border: 1px solid rgba(102, 126, 234, 0.08);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.document-card-horizontal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.document-card-horizontal:hover {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.12);
    border-color: rgba(102, 126, 234, 0.15);
}

.document-card-horizontal:hover::before {
    opacity: 1;
}

.document-icon-wrapper-horizontal {
    flex-shrink: 0;
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.document-file-type {
    position: absolute;
    top: 5px;
    right: 5px;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.document-info-horizontal {
    flex: 1;
    min-width: 0;
}

.document-category-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.document-category-tag i {
    font-size: 0.7rem;
}

.document-title-horizontal {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.35rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.document-desc-horizontal {
    font-size: 0.875rem;
    color: #64748b;
    margin-bottom: 0.65rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.document-meta-horizontal {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    align-items: center;
    font-size: 0.8125rem;
    color: #94a3b8;
}

.document-meta-horizontal .meta-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    white-space: nowrap;
}

.document-meta-horizontal .meta-item i {
    color: var(--primary);
    font-size: 0.875rem;
}

.document-actions-horizontal {
    flex-shrink: 0;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.btn-download-horizontal {
    padding: 0.625rem 1.25rem;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    white-space: nowrap;
}

.btn-download-horizontal:hover {
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.25);
    color: white;
}

.btn-download-horizontal i {
    font-size: 0.875rem;
}

.btn-preview-horizontal {
    padding: 0.625rem 1rem;
    background: white;
    color: var(--primary);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.btn-preview-horizontal:hover {
    background: rgba(102, 126, 234, 0.08);
    border-color: var(--primary);
    color: var(--secondary);
}

.empty-state-horizontal {
    text-align: center;
    padding: 4rem 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.empty-state-horizontal i {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state-horizontal p {
    color: var(--gray-600);
    font-size: 1.1rem;
    margin: 0;
}

/* Responsive for Documents Horizontal */
@media (max-width: 992px) {
    .document-card-horizontal {
        flex-wrap: wrap;
    }
    
    .document-actions-horizontal {
        width: 100%;
        flex-direction: row;
    }
    
    .btn-download-horizontal,
    .btn-preview-horizontal {
        flex: 1;
    }
}

@media (max-width: 768px) {
    .document-card-horizontal {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .document-icon-wrapper-horizontal {
        width: 65px;
        height: 65px;
        margin: 0 auto;
    }

    .document-info-horizontal {
        text-align: left;
    }

    .document-meta-horizontal {
        justify-content: center;
        gap: 0.75rem;
    }

    .document-actions-horizontal {
        width: 100%;
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .document-meta-horizontal {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .document-meta-horizontal .meta-item {
        width: 100%;
    }
    
    .document-icon-wrapper-horizontal {
        width: 60px;
        height: 60px;
    }
}