/* ===================================
   Çalışkan VIP Transfer - CSS Stylesheet
   Modern, Responsive, Professional
   =================================== */

/* --- CSS Variables --- */
:root {
    --primary-color: #1a1a2e;
    --secondary-color: #d4af37;
    --accent-color: #16213e;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --dark-overlay: rgba(0, 0, 0, 0.7);
    --transition: all 0.3s ease;
    --shadow: 0 5px 15px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* --- Container & Layout --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--secondary-color);
}

.section-title p {
    color: #666;
    font-size: 1.1rem;
    margin-top: 20px;
}

/* --- Header & Navigation --- */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background: var(--primary-color);
}

.header.scrolled .nav-menu a {
    color: var(--white);
}

.header.scrolled .logo {
    color: var(--white);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo span {
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: var(--transition);
}

.btn {
    padding: 12px 30px;
    background: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
}

.btn:hover {
    background: #c09b2e;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

.btn-outline:hover {
    background: var(--secondary-color);
    color: var(--white);
}

/* --- Hero Section --- */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.55)),
                url('../resim/mercedess.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    padding: 200px 0 120px;
    text-align: center;
    color: var(--white);
    position: relative;
    margin-top: 70px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-top: 60px;
    flex-wrap: wrap;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 15px;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.hero-feature-icon {
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* --- Services Section --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 25px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.service-card p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-card ul {
    text-align: left;
    margin-bottom: 20px;
}

.service-card ul li {
    padding: 8px 0;
    color: #555;
    position: relative;
    padding-left: 25px;
}

.service-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* --- Features Section --- */
.features {
    background: var(--light-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--white);
    border-radius: 10px;
    transition: var(--transition);
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin: 0 auto 20px;
}

.feature-item h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.feature-item p {
    color: #666;
}

/* --- Fleet Section --- */
.fleet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.fleet-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.fleet-image {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 3rem;
}

.fleet-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.fleet-info {
    padding: 25px;
}

.fleet-info h3 {
    font-size: 1.6rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.fleet-info .price {
    color: var(--secondary-color);
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 15px;
}

.fleet-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 20px 0;
}

.fleet-spec {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #666;
}

.fleet-spec span:first-child {
    color: var(--secondary-color);
}

/* --- About Section --- */
.about {
    background: var(--light-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 4rem;
}

.about-text h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.about-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--white);
    border-radius: 10px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--secondary-color);
    display: block;
}

.stat-label {
    color: #666;
    margin-top: 5px;
}

/* --- Contact Section --- */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: start;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h3 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

.contact-details p {
    color: #666;
}

.contact-details a {
    color: var(--secondary-color);
    font-weight: 600;
}

.contact-form {
    background: var(--light-bg);
    padding: 40px;
    border-radius: 10px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--primary-color);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* --- Testimonials --- */
.testimonials {
    background: var(--light-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 4rem;
    color: var(--secondary-color);
    opacity: 0.3;
}

.testimonial-text {
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.author-info h4 {
    color: var(--primary-color);
    margin-bottom: 3px;
}

.author-info p {
    color: #999;
    font-size: 0.9rem;
}

.stars {
    color: var(--secondary-color);
    margin-bottom: 15px;
}

/* --- CTA Section --- */
.cta {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    text-align: center;
    padding: 80px 0;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

/* --- Footer --- */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    color: var(--secondary-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.footer-section p,
.footer-section li {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 10px;
    line-height: 1.8;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* --- Page Headers --- */
.page-header {
    background: linear-gradient(var(--dark-overlay), var(--dark-overlay)),
                url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 400"><rect fill="%231a1a2e" width="1200" height="400"/></svg>');
    background-size: cover;
    background-position: center;
    padding: 150px 0 80px;
    text-align: center;
    color: var(--white);
    margin-top: 70px;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* --- Breadcrumb --- */
.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb a {
    color: var(--secondary-color);
}

.breadcrumb span {
    color: rgba(255, 255, 255, 0.5);
}

/* --- Reservation Form --- */
.reservation-form {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin: -80px auto 80px;
    position: relative;
    z-index: 10;
}

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

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

/* --- Responsive Design --- */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 30px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .page-header h1 {
        font-size: 2.2rem;
    }
}

@media (max-width: 640px) {
    .hero {
        padding: 150px 0 80px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .section {
        padding: 50px 0;
    }

    .services-grid,
    .fleet-grid {
        grid-template-columns: 1fr;
    }

    .hero-features {
        flex-direction: column;
        gap: 20px;
    }

    .contact-form,
    .reservation-form {
        padding: 25px;
    }
}

/* --- Utility Classes --- */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.text-gold {
    color: var(--secondary-color);
}

.text-primary {
    color: var(--primary-color);
}

.bg-light {
    background: var(--light-bg);
}

.hidden {
    display: none;
}
/* --- Gallery Section --- */
.gallery-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.gallery-wrapper {
    margin: 40px 0;
}

.gallery-slider {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.gallery-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    padding: 20px;
    background: white;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    cursor: pointer;
    aspect-ratio: 1;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.3);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 46, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.gallery-zoom {
    font-size: 32px;
    color: var(--secondary-color);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(212, 175, 55, 0.9);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
    z-index: 10;
}

.gallery-nav:hover {
    background: var(--secondary-color);
}

.gallery-prev {
    left: 20px;
}

.gallery-next {
    right: 20px;
}

/* -- Gallery Modal -- */
.gallery-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.gallery-modal.active {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.gallery-modal-img {
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
}

.gallery-modal-close {
    position: absolute;
    top: 30px;
    right: 40px;
    color: var(--secondary-color);
    font-size: 40px;
    cursor: pointer;
    z-index: 1001;
    transition: color 0.3s ease;
}

.gallery-modal-close:hover {
    color: white;
}

.gallery-modal-nav {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 20px;
    z-index: 1001;
}

.gallery-modal-btn {
    background: rgba(212, 175, 55, 0.9);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.gallery-modal-btn:hover {
    background: var(--secondary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .gallery-container {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
        padding: 15px;
    }

    .gallery-item {
        aspect-ratio: 1;
    }

    .gallery-nav {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .gallery-prev {
        left: 10px;
    }

    .gallery-next {
        right: 10px;
    }

    .gallery-modal-img {
        max-width: 95%;
        max-height: 70vh;
    }

    .gallery-modal-close {
        top: 20px;
        right: 20px;
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .gallery-container {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 12px;
    }

    .gallery-item {
        aspect-ratio: 1.2;
    }

    .gallery-nav {
        display: none;
    }

    .gallery-modal-nav {
        bottom: 20px;
        gap: 15px;
    }

    .gallery-modal-btn {
        width: 45px;
        height: 45px;
        font-size: 20px;
    }
}

/* =================================
   References Section Styles
   ================================= */

/* References Container */
.references-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

/* Loading and Error States */
.loading-message,
.error-message,
.no-references {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-color);
}

.no-references {
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
    max-width: 500px;
    margin: 0 auto;
}

.no-references-icon {
    font-size: 80px;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}

.no-references h3 {
    color: var(--primary-color);
    font-size: 28px;
    margin-bottom: 10px;
}

.no-references p {
    color: #666;
    font-size: 16px;
}

/* Reference Category */
.reference-category {
    margin-bottom: 60px;
    animation: fadeInUp 0.6s ease-out;
}

.reference-category:last-child {
    margin-bottom: 0;
}

/* Category Header */
.category-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid var(--secondary-color);
}

.category-icon {
    font-size: 40px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.category-title {
    font-size: 32px;
    color: var(--primary-color);
    font-weight: 700;
    flex: 1;
}

.category-count {
    background: var(--secondary-color);
    color: var(--white);
    padding: 8px 20px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(212, 175, 55, 0.3);
}

/* Reference Grid */
.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

/* Reference Item */
.reference-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: var(--light-bg);
}

.reference-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.reference-item:hover img {
    transform: scale(1.1);
}

/* Reference Overlay */
.reference-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

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

.reference-zoom {
    font-size: 48px;
    transform: scale(0.5);
    transition: var(--transition);
}

.reference-item:hover .reference-zoom {
    transform: scale(1);
}

/* Reference Modal */
.reference-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 10px 50px rgba(0,0,0,0.5);
    animation: zoomIn 0.3s ease-out;
}

/* Modal Close Button */
.modal-close {
    position: absolute;
    top: 30px;
    right: 40px;
    color: var(--white);
    font-size: 50px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10001;
    transition: var(--transition);
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.modal-close:hover {
    color: var(--secondary-color);
    transform: rotate(90deg);
}

/* Modal Caption */
.modal-caption {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--white);
    background: rgba(0,0,0,0.7);
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    backdrop-filter: blur(10px);
    z-index: 10001;
}

/* Modal Navigation Buttons */
.modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(212, 175, 55, 0.9);
    color: var(--white);
    border: none;
    padding: 20px 25px;
    font-size: 28px;
    cursor: pointer;
    z-index: 10001;
    transition: var(--transition);
    border-radius: 8px;
}

.modal-nav:hover {
    background: var(--secondary-color);
    transform: translateY(-50%) scale(1.1);
}

.modal-prev {
    left: 30px;
}

.modal-next {
    right: 30px;
}

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

@keyframes zoomIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .references-section {
        padding: 50px 0;
    }

    .category-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .category-icon {
        font-size: 32px;
    }

    .category-title {
        font-size: 24px;
    }

    .reference-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }

    .modal-close {
        top: 15px;
        right: 15px;
        font-size: 40px;
    }

    .modal-nav {
        padding: 15px 18px;
        font-size: 22px;
    }

    .modal-prev {
        left: 15px;
    }

    .modal-next {
        right: 15px;
    }

    .modal-caption {
        bottom: 15px;
        font-size: 14px;
        padding: 10px 20px;
    }
}

@media (max-width: 480px) {
    .reference-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .reference-item {
        aspect-ratio: 16/10;
    }

    .modal-nav {
        padding: 12px 15px;
        font-size: 18px;
    }
}