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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
}

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

main {
    padding: 40px;
}

.form {
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 25px;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
    font-size: 0.95em;
}

input[type="url"],
input[type="number"],
textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1em;
    font-family: inherit;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="url"]:focus,
input[type="number"]:focus,
textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

small {
    display: block;
    margin-top: 5px;
    color: #888;
    font-size: 0.85em;
}

.btn-primary {
    width: 100%;
    padding: 15px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 10px;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.result {
    margin-top: 40px;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 12px;
    text-align: center;
}

.result h2 {
    margin-bottom: 20px;
    color: #333;
}

.video-container {
    margin: 20px 0;
    border-radius: 12px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

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

.video-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

.btn-secondary {
    padding: 12px 24px;
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-block;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.error {
    margin-top: 30px;
    padding: 20px;
    background: #fee;
    border: 2px solid #fcc;
    border-radius: 8px;
    color: #c33;
}

.error h3 {
    margin-bottom: 10px;
}

footer {
    text-align: center;
    padding: 20px;
    background: #f8f9fa;
    color: #888;
    font-size: 0.9em;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }

    main {
        padding: 25px;
    }

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

    .video-actions {
        flex-direction: column;
    }

    .btn-secondary {
        width: 100%;
    }
}