/* ============================================
   VTU WEBSITE - MAIN STYLESHEET
   Version: 1.0
   ============================================ */

/* ===== IMPORT FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* ===== ROOT VARIABLES ===== */
:root {
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --secondary-color: #764ba2;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --dark-color: #1a2332;
    --light-color: #f8f9fa;
    --text-color: #333;
    --text-muted: #6c757d;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 5px 20px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
    --border-radius: 10px;
    --font-family: 'Poppins', sans-serif;
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    color: var(--text-color);
    background-color: #f4f6f9;
    line-height: 1.6;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--dark-color);
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
}

/* ===== BUTTONS ===== */
.btn {
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
    color: #fff;
}

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

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(40, 167, 69, 0.4);
    color: #fff;
}

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

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(220, 53, 69, 0.4);
    color: #fff;
}

.btn-warning {
    background: var(--warning-color);
    color: var(--dark-color);
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255, 193, 7, 0.4);
    color: var(--dark-color);
}

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

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

.btn-lg {
    padding: 15px 35px;
    font-size: 18px;
}

.btn-sm {
    padding: 6px 15px;
    font-size: 13px;
}

/* ===== CARDS ===== */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow: hidden;
}

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

.card-body {
    padding: 25px;
}

/* ===== FORMS ===== */
.form-control {
    border-radius: 50px;
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    transition: var(--transition);
    font-family: var(--font-family);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

.form-control.is-valid {
    border-color: var(--success-color);
}

.form-label {
    font-weight: 500;
    margin-bottom: 8px;
}

.input-group-text {
    background: var(--light-color);
    border: 2px solid var(--border-color);
    border-radius: 50px 0 0 50px;
}

.input-group .form-control {
    border-radius: 0 50px 50px 0;
}

/* ===== ALERTS ===== */
.alert {
    border-radius: var(--border-radius);
    border: none;
    padding: 15px 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
}

/* ===== BADGES ===== */
.badge {
    padding: 5px 12px;
    border-radius: 50px;
    font-weight: 500;
}

/* ===== HERO SECTION ===== */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 80px 0;
    color: #fff;
    min-height: 500px;
    display: flex;
    align-items: center;
}

.hero-section h1 {
    color: #fff;
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero-section .lead {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 30px;
}

.hero-section .btn-warning {
    box-shadow: 0 5px 20px rgba(255, 193, 7, 0.3);
}

/* ===== SERVICE CARDS ===== */
.service-card {
    text-align: center;
    padding: 30px 20px;
    border-radius: var(--border-radius);
    background: #fff;
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: 100%;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.service-card .service-icon {
    width: 70px;
    height: 70px;
    line-height: 70px;
    border-radius: 50%;
    margin: 0 auto 15px;
    font-size: 30px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
}

.service-card h5 {
    font-weight: 600;
    margin-bottom: 10px;
}

.service-card .btn {
    margin-top: 15px;
}

/* ===== FEATURES SECTION ===== */
.features-section {
    padding: 60px 0;
}

.feature-item {
    text-align: center;
    padding: 30px;
}

.feature-item i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-item h5 {
    font-weight: 600;
}

/* ===== STATS SECTION ===== */
.stats-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 60px 0;
    color: #fff;
}

.stats-section h3 {
    color: #fff;
    font-size: 36px;
    font-weight: 700;
}

.stats-section p {
    opacity: 0.9;
    margin: 0;
}

/* ===== PAGINATION ===== */
.pagination .page-item .page-link {
    border-radius: 50px;
    margin: 0 3px;
    border: none;
    color: var(--text-color);
    transition: var(--transition);
}

.pagination .page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
}

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

/* ===== MODAL ===== */
.modal-content {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--shadow-hover);
}

.modal-header {
    border-bottom: 2px solid var(--border-color);
    padding: 20px 25px;
}

.modal-footer {
    border-top: 2px solid var(--border-color);
    padding: 20px 25px;
}

/* ===== TABLE ===== */
.table {
    margin-bottom: 0;
}

.table th {
    font-weight: 600;
    border-top: none;
    color: var(--text-muted);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

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

::-webkit-scrollbar-track {
    background: var(--light-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

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

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

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

.shadow-hover {
    transition: var(--transition);
}

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

.rounded-lg {
    border-radius: var(--border-radius);
}

/* ===== FOOTER ===== */
footer {
    background: var(--dark-color);
    color: rgba(255,255,255,0.7);
    padding: 40px 0 20px;
}

footer h5 {
    color: #fff;
    font-weight: 600;
    margin-bottom: 20px;
}

footer a {
    color: rgba(255,255,255,0.7);
}

footer a:hover {
    color: #fff;
}

footer .social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    margin-right: 10px;
    transition: var(--transition);
}

footer .social-links a:hover {
    background: var(--primary-color);
    color: #fff;
    transform: translateY(-3px);
}