/**
 * Tushar Tech Solutions - Main Stylesheet
 * Blue Professional Theme
 */

/* ============================================
   CSS Variables & Base Styles
============================================ */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    --light: #f8fafc;
    --dark: #1e293b;
    --body-bg: #f1f5f9;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--body-bg);
    color: var(--dark);
    line-height: 1.6;
}

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

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

/* ============================================
   Navigation
============================================ */
.navbar {
    padding: 0.75rem 0;
    transition: var(--transition);
}

.navbar-brand {
    font-size: 1.25rem;
    letter-spacing: -0.5px;
}

.navbar-nav .nav-link {
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.95rem;
    opacity: 0.9;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    opacity: 1;
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* ============================================
   Hero Section
============================================ */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, #1e40af 100%);
    color: white;
    padding: 6rem 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='0.05'%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 .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    max-width: 600px;
}

/* ============================================
   Section Styles
============================================ */
.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.section-subtitle {
    color: var(--secondary);
    margin-bottom: 3rem;
}

/* ============================================
   Cards
============================================ */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1.25rem;
    border: none;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background: white;
    border-top: 1px solid #e2e8f0;
    padding: 1rem 1.5rem;
}

/* Internship Card */
.internship-card {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.internship-card .card-body {
    flex: 1;
}

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

.internship-card .internship-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--secondary);
}

.internship-card .internship-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.internship-card .internship-description {
    color: #64748b;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.internship-card .internship-technologies {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.internship-card .tech-badge {
    background: #e0e7ff;
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.internship-card .internship-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

/* Offer Card */
.offer-card {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border: 2px dashed #f59e0b;
}

.offer-card .discount-badge {
    background: #f59e0b;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    display: inline-block;
}

/* ============================================
   Buttons
============================================ */
.btn {
    padding: 0.625rem 1.5rem;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
}

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

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

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

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

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.1rem;
}

/* ============================================
   Forms
============================================ */
.form-control,
.form-select {
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.form-text {
    font-size: 0.85rem;
    color: var(--secondary);
}

.required::after {
    content: ' *';
    color: var(--danger);
}

/* ============================================
   Badges
============================================ */
.badge {
    padding: 0.375rem 0.75rem;
    font-weight: 500;
    border-radius: 6px;
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

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

.feature-text {
    color: var(--secondary);
    font-size: 0.95rem;
}

/* ============================================
   Stats Section
============================================ */
.stats-section {
    background: var(--dark);
    color: white;
    padding: 4rem 0;
}

.stat-box {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-light);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.8;
}

/* ============================================
   Details Page
============================================ */
.details-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 3rem 0;
}

.details-content {
    background: white;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    margin-top: -2rem;
    position: relative;
    z-index: 1;
}

.details-sidebar {
    position: sticky;
    top: 100px;
}

.price-box {
    background: var(--light);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
}

.price-box .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.price-box .original-price {
    text-decoration: line-through;
    color: var(--secondary);
    font-size: 1.25rem;
}

/* ============================================
   Footer
============================================ */
footer {
    background: var(--dark);
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #94a3b8;
    font-size: 0.95rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

/* ============================================
   Back to Top Button
============================================ */
#backToTop {
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   Utilities
============================================ */
.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

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

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

/* ============================================
   Responsive Design
============================================ */
@media (max-width: 991.98px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 767.98px) {
    .hero-section {
        padding: 4rem 0;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .stat-box {
        margin-bottom: 2rem;
    }

    .feature-box {
        margin-bottom: 2rem;
    }
}

@media (max-width: 575.98px) {
    .hero-title {
        font-size: 1.875rem;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
}

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

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

/* ============================================
   Notice Box
============================================ */
.notice-box {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 1rem 1.25rem;
    border-radius: 0 8px 8px 0;
}

.notice-box.notice-info {
    background: #dbeafe;
    border-left-color: var(--primary);
}

.notice-box.notice-success {
    background: #d1fae5;
    border-left-color: var(--success);
}

.notice-box.notice-danger {
    background: #fee2e2;
    border-left-color: var(--danger);
}

/* ============================================
   Page Header
============================================ */
.page-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 3rem 0;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-header .breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
}

.page-header .breadcrumb-item a {
    color: rgba(255, 255, 255, 0.8);
}

.page-header .breadcrumb-item.active {
    color: white;
}

.page-header .breadcrumb-item + .breadcrumb-item::before {
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   Policy Pages
============================================ */
.policy-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-light);
}

.policy-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.policy-content ul,
.policy-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.policy-content li {
    margin-bottom: 0.5rem;
    color: #475569;
}

/* ============================================
   Loading Spinner
============================================ */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}