/* Reset ve Temel Stiller */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Mobil dokunma optimizasyonu */
* {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

input, textarea {
    -webkit-user-select: text;
    -khtml-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Stilleri */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 3rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 300;
}

.header h1 i {
    margin-right: 15px;
    color: #ffd700;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Ana İçerik */
.main {
    padding: 3rem 0;
}

/* Arama Bölümü */
.search-section {
    margin-bottom: 3rem;
}

.search-box {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.search-box i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #666;
    font-size: 1.2rem;
}

.search-box input {
    width: 100%;
    padding: 15px 20px 15px 50px;
    border: 2px solid #e1e5e9;
    border-radius: 50px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.search-box input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Video Grid */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.video-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid #e1e5e9;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-color: #667eea;
}

.video-thumbnail {
    position: relative;
    width: 100%;
    height: 240px;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.1);
}

.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #667eea;
    transition: all 0.3s ease;
}

.video-card:hover .play-icon {
    transform: translate(-50%, -50%) scale(1.1);
    background: white;
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.85rem;
    font-weight: 500;
}

.video-content {
    padding: 1.5rem;
}

.video-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.video-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    color: white;
    font-size: 1.3rem;
}

.video-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.video-subtitle {
    color: #666;
    font-size: 0.9rem;
}

.video-description {
    color: #555;
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #e1e5e9;
    font-size: 0.85rem;
    color: #666;
}

.video-meta i {
    margin-right: 5px;
}

/* Modal Stilleri */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 2% auto;
    width: 90%;
    max-width: 1100px;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid #e1e5e9;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8f9fa;
}

.modal-header h2 {
    color: #333;
    font-weight: 600;
}

.close {
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: #333;
}

.modal-body {
    padding: 0;
}

.video-container {
    position: relative;
    width: 100%;
    background: #000;
}

.video-container video {
    width: 100%;
    max-height: 70vh;
    display: block;
}

.video-info {
    padding: 2rem;
    background: white;
}

.video-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.video-info p {
    color: #555;
    line-height: 1.8;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* Responsive Tasarım */
@media (max-width: 1024px) {
    .videos-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }
    
    .header p {
        font-size: 1rem;
    }
    
    .videos-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .video-card {
        margin: 0 10px;
    }
    
    .video-thumbnail {
        height: 200px;
    }
    
    .modal-content {
        width: 95%;
        margin: 5% auto;
        border-radius: 10px;
    }
    
    .modal-header {
        padding: 1rem 1.5rem;
    }
    
    .video-container video {
        max-height: 50vh;
    }
    
    .video-info {
        padding: 1.5rem;
    }
    
    .search-box {
        max-width: 90%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .header {
        padding: 1.5rem 0;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .header p {
        font-size: 0.9rem;
    }
    
    .main {
        padding: 1.5rem 0;
    }
    
    .video-card {
        margin: 0 5px;
    }
    
    .video-thumbnail {
        height: 180px;
    }
    
    .play-icon {
        width: 60px;
        height: 60px;
        font-size: 1.7rem;
    }
    
    .video-content {
        padding: 1rem;
    }
    
    .video-title {
        font-size: 1.1rem;
    }
    
    .modal-content {
        width: 98%;
        margin: 1% auto;
    }
    
    .modal-header {
        padding: 0.8rem 1rem;
    }
    
    .modal-header h2 {
        font-size: 1.1rem;
    }
    
    .video-info {
        padding: 1rem;
    }
    
    .video-info h3 {
        font-size: 1.2rem;
    }
}

/* Animasyonlar */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.video-card {
    animation: fadeIn 0.6s ease-out;
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* No Results */
.no-results {
    text-align: center;
    padding: 3rem;
    grid-column: 1 / -1;
}

.no-results h3 {
    color: #666;
    margin-bottom: 0.5rem;
}

.no-results p {
    color: #999;
}