/* styles.css */

/* Genel Ayarlamalar ve Reset */
:root {
    --primary-orange: #FF6F00; /* Canlı Turuncu */
    --secondary-yellow: #FFD100; /* Canlı Sarı */
    --dark-blue: #1A237E; /* Koyu Mavi */
    --light-gray: #F5F5F5; /* Açık Gri arka planlar için */
    --text-dark: #333;
    --text-light: #FFF;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Poppins', sans-serif;
    --border-radius: 8px;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--light-gray);
    overflow-x: hidden; /* Yatay kaydırmayı engeller */
}

a {
    text-decoration: none;
    color: var(--dark-blue);
    transition: color 0.3s ease;
}

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

ul {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--dark-blue);
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.8rem; }

section {
    padding: var(--spacing-lg) 5%; /* Yanlarda boşluk bırakır */
    margin-bottom: var(--spacing-md);
}

/* Buton Stilleri */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    font-weight: bold;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-orange);
    color: var(--text-light);
    box-shadow: 0 4px 15px rgba(255, 111, 0, 0.3);
}

.btn-primary:hover {
    background-color: #e66300; /* slightly darker orange */
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 111, 0, 0.4);
}

.btn-register {
    background-color: var(--dark-blue);
    color: var(--text-light);
    padding: 0.6rem 1.2rem;
}

.btn-register:hover {
    background-color: #12185c;
}

.btn-details {
    background-color: var(--secondary-yellow);
    color: var(--dark-blue);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
}

.btn-details:hover {
    background-color: #e0bb00;
}

/* Header / Navbar */
header {
    background-color: rgba(255, 255, 255, 0.95); /* Hafif şeffaf */
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 5%;
}

nav .logo img {
    height: 50px; /* Logo boyutunu ayarlayın */
}

nav .nav-links {
    display: flex;
}

nav .nav-links li {
    margin-left: var(--spacing-md);
}

nav .nav-links a {
    color: var(--dark-blue);
    font-weight: 500;
    font-size: 1.05rem;
    position: relative;
    padding-bottom: 5px; /* Alt çizgi için boşluk */
}

nav .nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 3px;
    background-color: var(--primary-orange);
    transition: width 0.3s ease;
}

nav .nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-selector {
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--dark-blue);
    border-radius: var(--border-radius);
    background-color: transparent;
    color: var(--dark-blue);
    cursor: pointer;
}

.hamburger-menu {
    display: none; /* Masaüstünde gizli */
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger-menu span {
    width: 25px;
    height: 3px;
    background-color: var(--dark-blue);
    border-radius: 2px;
}

/* Hero Section - GÜNCELLENDİ */
.hero-section {
    background: linear-gradient(135deg, var(--dark-blue) 0%, #303F9F 50%, #424242 100%); /* Koyu Mavi tonları */
    color: var(--text-light);
    text-align: left; /* Metinleri sola hizaladık */
    padding: var(--spacing-lg) 5%;
    min-height: 600px; /* En az yükseklik */
    display: flex;
    align-items: center;
    justify-content: space-between; /* İçerik ve görsel arasında boşluk */
    position: relative;
    overflow: hidden; /* Arka plan öğeleri için */
}

/* Görseldeki gibi arka plan öğeleri için */
.hero-section::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 300px;
    height: 300px;
    background-image: url('hero-pattern-book.png'); /* Kitap veya Anadolu deseni */
    background-size: contain;
    background-repeat: no-repeat;
    opacity: 0.2;
    transform: rotate(20deg);
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 400px;
    height: 400px;
    background-image: url('hero-pattern-ornament.png'); /* Daha büyük bir desen */
    background-size: contain;
    background-repeat: no-repeat;
    opacity: 0.15;
    transform: rotate(-30deg);
}

.hero-content {
    max-width: 50%; /* İçeriğin genişliğini %50 yaptık */
    z-index: 1; /* İçeriğin desenlerin üzerinde kalmasını sağlar */
    padding-right: 2rem; /* Görsel ile arasına boşluk */
}

.hero-content h1 {
    color: var(--text-light);
    font-size: 3.5rem; /* Başlık boyutunu biraz küçülttük */
    margin-bottom: 1rem;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.2);
}

.hero-content .dates {
    font-size: 1.3rem; /* Tarih boyutunu küçülttük */
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    color: var(--secondary-yellow);
}

.hero-content .tagline {
    font-size: 1.1rem; /* Slogan boyutunu küçülttük */
    margin-top: var(--spacing-md);
    color: rgba(255, 255, 255, 0.8);
}

.hero-image {
    max-width: 45%; /* Görselin genişliğini %45 yaptık */
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image img {
    width: 100%;
    max-width: 500px; /* Maksimum genişlik */
    height: auto;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border: 3px solid var(--secondary-yellow);
}

/* Countdown Section */
.countdown-section {
    background-color: var(--dark-blue);
    color: var(--text-light);
    text-align: center;
    padding: var(--spacing-lg) 5%;
    margin-top: -var(--spacing-md); /* Üstteki bölümle çakışma */
    border-bottom: 8px solid var(--primary-orange); /* Alt çizgi */
    position: relative;
}

.countdown-section h2 {
    color: var(--secondary-yellow);
    margin-bottom: var(--spacing-md);
    font-size: 2rem;
}

.countdown-timer {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap; /* Küçük ekranlarda alta geçiş */
}

.time-block {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    min-width: 120px;
}

.time-block .value {
    display: block;
    font-size: 3.5rem;
    font-weight: bold;
    color: var(--text-light);
    line-height: 1;
}

.time-block .label {
    display: block;
    font-size: 1rem;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 0.5rem;
}

.countdown-info {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
}

/* About Section */
.about-section {
    background-color: var(--text-light);
    padding: 0;
    text-align: center;
    max-width: 100%;
    margin: 0 auto var(--spacing-md) auto;
    box-shadow: none;
    border-radius: 0;
    overflow: hidden;
}

.about-section .map-container {
    width: 100%;
    margin: 0;
}

.about-section .map-container img {
    width: 100%;
    height: auto;
    display: block;
}

/* Featured Events Section */
.featured-events-section {
    text-align: center;
    background-color: var(--light-gray);
}

.featured-events-section h2 {
    margin-bottom: var(--spacing-lg);
    color: var(--dark-blue);
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.event-card {
    background-color: var(--text-light);
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    overflow: hidden;
    text-align: left;
    transition: transform 0.3s ease;
}

.event-card:hover {
    transform: translateY(-5px);
}

.event-card img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    display: block;
}

.event-card h3 {
    padding: 1rem 1.5rem 0.5rem;
    color: var(--dark-blue);
    font-size: 1.3rem;
}

.event-card .event-meta {
    padding: 0 1.5rem;
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.event-card .event-description {
    padding: 0 1.5rem 1rem;
    font-size: 0.95rem;
    color: #555;
}

.event-card .btn-details {
    margin: 0 1.5rem 1.5rem;
}

/* Speakers & Events Grid Section */
.speakers-section {
    background-color: var(--text-light);
    text-align: center;
    padding-bottom: var(--spacing-lg);
}

.speakers-section h2 {
    margin-bottom: var(--spacing-md);
    color: var(--dark-blue);
}

.filter-options {
    display: flex;
    justify-content: center;
    flex-wrap: wrap; /* Küçük ekranlarda alt alta geçiş */
    gap: 1rem;
    margin-bottom: var(--spacing-lg);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.filter-btn {
    padding: 0.8rem 1.5rem;
    border: 1px solid var(--dark-blue);
    border-radius: 50px;
    background-color: transparent;
    color: var(--dark-blue);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn.active,
.filter-btn:hover {
    background-color: var(--primary-orange);
    color: var(--text-light);
    border-color: var(--primary-orange);
}

.filter-dropdown, .search-bar {
    padding: 0.8rem 1.5rem;
    border: 1px solid #ccc;
    border-radius: 50px;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-dark);
}

.search-bar {
    width: 250px;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* Masaüstünde 4 sütun */
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.speaker-card {
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    padding: 1.5rem 1rem;
    text-align: center;
    transition: transform 0.3s ease;
}

.speaker-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.1);
}

.speaker-card img {
    width: 100px;
    height: 100px;
    border-radius: 50%; /* Yuvarlak resimler */
    object-fit: cover;
    margin-bottom: 1rem;
    border: 3px solid var(--primary-orange); /* Turuncu çerçeve */
}

.speaker-card h3 {
    font-size: 1.15rem;
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.speaker-card .event-info {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 0.3rem;
}

.speaker-card .event-date-time {
    font-size: 0.85rem;
    color: #888;
}

/* Location Section */
.location-section {
    background-color: var(--dark-blue);
    color: var(--text-light);
    text-align: center;
    padding: var(--spacing-lg) 5%;
}

.location-section h2 {
    color: var(--secondary-yellow);
    margin-bottom: var(--spacing-md);
}

.map-container {
    width: 100%;
    height: 450px;
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow: hidden; /* Harita kenarlarını yuvarlar */
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

.map-container iframe {
    border: none;
    width: 100%;
    height: 100%;
}

.location-info {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
}

.location-info p {
    margin-bottom: 0.8rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Sponsors Section */
.sponsors-section {
    background-color: #ffffff;
    padding: 50px 20px;
    text-align: center;
    border-radius: 0px;
    margin-top: 40px;
}

.sponsors-section h2 {
    color: #2c3e50;
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.sponsor-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 50px;
    flex-wrap: wrap;
}

.sponsor-item {
    text-align: center;
}

.sponsor-item img {
    width: 120px;
    height: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.sponsor-item2 img {
    width: 150px;
    height: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.sponsor-item img:hover {
    transform: scale(1.05);
}

.sponsor-item p {
    margin-top: 10px;
    font-size: 1rem;
    color: #34495e;
    font-weight: 600;
}

/* Footer Section */
.footer-section {
    background-color: var(--dark-blue);
    color: var(--text-light);
    padding: var(--spacing-lg) 5%;
    font-size: 0.95rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto var(--spacing-md) auto;
    text-align: left;
}

.footer-col h3 {
    color: var(--secondary-yellow);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-col p, .footer-col ul li {
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
}

.footer-col a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-col a:hover {
    color: var(--primary-orange);
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-icons img {
    width: 30px;
    height: 30px;
    filter: invert(1); /* Beyaz ikonlar */
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.social-icons img:hover {
    opacity: 1;
}

.copyright {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: var(--spacing-md);
    color: rgba(255, 255, 255, 0.6);
}

/* Kitap Fuarı Etkinlikleri Bölümü Stilleri */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.fuar-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    color: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.fuar-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: white;
}

.fuar-bilgisi {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.fuar-bilgisi div {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 500;
}

.kartlar-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.kart {
    background-color: #262121;
    border-radius: 102px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    position: relative;
}

.kart:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}
.kart:hover .kart-ikon {
    transform: scale(1.1);
    transition: transform 0.3s ease;
    background-color: rgba(255, 255, 255, 0.3);
}
.kart-baslik {
    padding: 20px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: white;
    position: relative;
    z-index: 2;
}

.imza-kart .kart-baslik {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
}

.soylesi-kart .kart-baslik {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.kart-icerik {
    padding: 40px 20px;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

.kart-icerik p {
    display: none; /* Yazıları gizle */
}
.kart-ikon {
    width: 220px;
    height: 220px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}
.kart-ikon i {
    font-size: 3.5rem;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.kart-sayisi {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin: 0;
}

.imza-kart .kart-ikon {
    content: url('images/imza.png');
}

.soylesi-kart .kart-ikon {
    content: url('images/soylesi.png');
}

.filtreler {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.filtreler select, .filtreler input {
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    background-color: white;
    flex: 1;
    min-width: 200px;
}

.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    overflow-y: auto;
}

.popup-icerik {
    background-color: white;
    margin: 40px auto;
    padding: 0;
    width: 90%;
    max-width: 1000px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: popupFadeIn 0.3s ease;
}

@keyframes popupFadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.popup-baslik {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
}

.popup-baslik h2 {
    font-size: 1.8rem;
    color: #2c3e50;
}

.kapat-btn {
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: #7f8c8d;
    transition: color 0.2s;
}

.kapat-btn:hover {
    color: #e74c3c;
}

.gun-filtreleri {
    display: flex;
    gap: 10px;
    padding: 15px 20px;
    border-bottom: 1px solid #eee;
    flex-wrap: wrap;
}

.gun-btn {
    padding: 8px 16px;
    background-color: #f1f2f6;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.gun-btn:hover {
    background-color: #dfe4ea;
}

.gun-btn.active {
    background-color: #3498db;
    color: white;
}

.popup-filtreler {
    padding: 15px 20px;
    display: flex;
    gap: 15px;
    border-bottom: 1px solid #eee;
    flex-wrap: wrap;
}

.popup-filtreler input {
    flex: 2;
    min-width: 250px;
}

.liste-container {
    max-height: 500px;
    overflow-y: auto;
    padding: 0 20px 20px;
}

.liste-oge {
    padding: 15px;
    border-bottom: 1px solid #f1f1f1;
    transition: background-color 0.2s;
}

.liste-oge:hover {
    background-color: #f9f9f9;
}

.liste-oge:last-child {
    border-bottom: none;
}

.liste-oge h3 {
    color: #2c3e50;
    margin-bottom: 8px;
}

.liste-oge p {
    color: #7f8c8d;
    margin-bottom: 5px;
}

.yazar {
    font-weight: 600;
    color: #3498db !important;
}

.tarih {
    color: #e74c3c !important;
    font-weight: 500;
}

.konum {
    color: #27ae60 !important;
}

.yayinevi {
    color: #9b59b6 !important;
}

.yukleniyor {
    text-align: center;
    padding: 30px;
    color: #7f8c8d;
}

.hata-mesaji {
    background-color: #ffeaea;
    border-left: 4px solid #e74c3c;
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
}

.etkinlik-yok {
    text-align: center;
    padding: 30px;
    color: #7f8c8d;
    font-style: italic;
}

/* Başlangıç mesajı stilleri */
.baslangic-mesaji {
    text-align: center;
    padding: 60px 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-top: 30px;
}

.mesaj-icerik h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.mesaj-icerik p {
    color: #7f8c8d;
    font-size: 1.1rem;
    margin-bottom: 25px;
}

.mesaj-ikonlar {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.ikon-item {
    text-align: center;
}

.ikon-item span {
    font-size: 3rem;
    display: block;
    margin-bottom: 10px;
}

.ikon-item p {
    font-size: 1rem;
    color: #34495e;
    font-weight: 600;
    margin: 0;
}

/* Responsive Tasarım - Media Queries */

/* Tablet ve küçük masaüstü ekranlar (max-width: 1024px) */
@media (max-width: 1024px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2rem; }

    nav .nav-links {
        margin-left: 0;
    }

    /* Hero Section Responsive */
    .hero-section {
        flex-direction: column; /* Dikey hizalama */
        text-align: center; /* Ortaya hizalama */
        padding: var(--spacing-md) 5%;
    }
    
    .hero-content {
        max-width: 100%; /* Tam genişlik */
        padding-right: 0;
        margin-bottom: var(--spacing-md);
    }
    
    .hero-image {
        max-width: 100%; /* Görsel genişliğini azalt */
    }
    
    .hero-image img {
        max-width: 300px; /* Görsel boyutunu küçült */
    }

    .countdown-timer {
        gap: 1rem;
    }

    .time-block .value {
        font-size: 2.8rem;
    }

    .speakers-grid {
        grid-template-columns: repeat(3, 1fr); /* Tablette 3 sütun */
    }

    .footer-content {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    /* Kitap Fuarı Etkinlikleri Responsive */
    .kartlar-container {
        grid-template-columns: 1fr;
    }
    
    .filtreler, .popup-filtreler {
        flex-direction: column;
    }
    
    .filtreler select, .filtreler input {
        min-width: 100%;
    }
    
    .fuar-header h1 {
        font-size: 2rem;
    }
    
    .kart-ikon {
        width: 100px;
        height: 100px;
    }
}
@media (max-width: 768px) {
    .kart-ikon {
        width: 100px;
        height: 100px;
    }
    
    .kart-ikon i {
        font-size: 2.8rem;
    }
    
    .kart-sayisi {
        font-size: 2rem;
    }
    
    .kart-icerik {
        padding: 30px 15px;
        min-height: 150px;
    }
}

@media (max-width: 480px) {
    .kart-ikon {
        width: 150px;
        height: 150px;
    }
    
    .kart-ikon i {
        font-size: 2.5rem;
    }
    
    .kart-sayisi {
        font-size: 1.8rem;
    }
}
/* Mobil cihazlar (max-width: 768px) */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.5rem; }

    nav {
        padding: 1rem 5%;
        flex-wrap: wrap; /* Küçük ekranlarda esnek paketleme */
    }

    nav .nav-links, .nav-actions .btn-register, .nav-actions .lang-selector {
        display: none; /* Mobil görünümde gizle */
    }

    .hamburger-menu {
        display: flex; /* Mobil görünümde göster */
    }

    /* Hamburger menü açıldığında gösterilecek menü (JavaScript ile kontrol edilecek) */
    nav.open .nav-links {
        display: flex;
        flex-direction: column;
        width: 100%;
        text-align: center;
        background-color: rgba(255, 255, 255, 0.98);
        position: absolute;
        top: 70px; /* Header yüksekliğine göre ayarlanır */
        left: 0;
        padding: 1rem 0;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }
    nav.open .nav-links li {
        margin: 10px 0;
    }
    nav.open .nav-links a {
        font-size: 1.2rem;
        color: var(--dark-blue);
    }

    /* Hero Section Responsive */
    .hero-content h1 {
        font-size: 2.5rem; /* Başlık boyutunu küçült */
    }
    
    .hero-content .dates {
        font-size: 1.1rem; /* Tarih boyutunu küçült */
    }
    
    .hero-image {
        max-width: 100%; /* Görsel genişliğini artır */
    }
    
    .hero-image img {
        max-width: 350px; /* Görsel boyutunu küçült */
    }

    .hero-section::before, .hero-section::after {
        display: none; /* Mobil cihazlarda desenleri gizle */
    }

    .countdown-timer {
        flex-direction: column; /* Mobil cihazlarda alt alta yığ */
        gap: var(--spacing-sm);
    }

    .time-block {
        width: 80%;
        margin: 0 auto;
        padding: 0.8rem 1rem;
    }

    .time-block .value {
        font-size: 2.5rem;
    }

    .events-grid {
        grid-template-columns: 1fr; /* Mobil cihazlarda tek sütun */
    }

    .speakers-grid {
        grid-template-columns: repeat(2, 1fr); /* Mobil cihazlarda 2 sütun */
    }

    .filter-options {
        flex-direction: column;
        align-items: center;
    }

    .filter-btn, .filter-dropdown, .search-bar {
        width: 90%; /* Genişliği artır */
        max-width: 300px;
    }

    .footer-content {
        grid-template-columns: 1fr; /* Mobil cihazlarda tek sütun */
        text-align: center;
    }

    .footer-col ul {
        padding-left: 0;
    }

    .social-icons {
        justify-content: center;
    }
    
    /* İmza Günleri ve Söyleşiler Responsive */
    .kartlar-container {
        grid-template-columns: 1fr;
    }
    
    .filtreler {
        flex-direction: column;
    }
    
    .filtreler select, .filtreler input {
        min-width: 100%;
    }
    
    .fuar-header h1 {
        font-size: 1.8rem;
    }
    
    .gun-filtreleri {
        justify-content: center;
    }
    
    /* Responsive tasarım için */
    .mesaj-ikonlar {
        gap: 20px;
    }
    
    .ikon-item span {
        font-size: 2.5rem;
    }
    
    .mesaj-icerik h3 {
        font-size: 1.3rem;
    }
    
    .mesaj-icerik p {
        font-size: 1rem;
    }
}

/* Çok küçük mobil cihazlar (max-width: 480px) */
@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.6rem; }

    /* Hero Section Responsive */
    .hero-content h1 {
        font-size: 2rem; /* Başlık boyutunu daha da küçült */
    }
    
    .hero-image img {
        max-width: 500px; /* Görsel boyutunu daha da küçült */
    }

    .speakers-grid {
        grid-template-columns: 1fr; /* Çok küçük mobil cihazlarda tek sütun */
    }

    .time-block {
        width: 95%;
    }
}