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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: white;
}

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

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.8;
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 40px;
}

/* Card */
.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Features Grid */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature {
    text-align: center;
    padding: 20px;
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.feature h3 {
    margin-bottom: 10px;
    font-size: 1.3rem;
}

/* CTA Section */
.cta-section {
    text-align: center;
    margin-top: 40px;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(45deg, #ff6b6b, #ee5a24);
    color: white;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 60px;
    opacity: 0.7;
}

/* App Container */
#appContainer {
    display: none;
}

#appContainer.active {
    display: block;
}

.video-controls {
    margin-bottom: 20px;
    text-align: center;
}

.video-controls input,
.video-controls select,
.video-controls button {
    padding: 10px;
    margin: 5px;
    border: none;
    border-radius: 5px;
}

.video-controls input,
.video-controls select {
    background: #333;
    color: white;
}

.video-controls button {
    cursor: pointer;
    font-weight: bold;
}

.btn-primary {
    background: #007bff;
    color: white;
}

.btn-success {
    background: #28a745;
    color: white;
}

#videoPlayer {
    width: 100%;
    height: 500px;
    background: #000;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

#roomInfo {
    margin-top: 20px;
    text-align: center;
    opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .container {
        padding: 15px;
    }
    
    .card {
        padding: 20px;
    }
    
    .video-controls input {
        width: 100%;
        margin-bottom: 10px;
    }
}