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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
}

.card {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.5s ease-out;
}

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

h1 {
    color: #333;
    margin-bottom: 10px;
    font-size: 28px;
    text-align: center;
}

.subtitle {
    color: #666;
    text-align: center;
    margin-bottom: 30px;
    font-size: 14px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-wrapper {
    position: relative;
}

input[type="url"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
}

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

input[type="url"]::placeholder {
    color: #999;
}

.btn-download {
    padding: 12px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-download:active {
    transform: translateY(0);
}

.btn-download:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Статус контейнер */
.status-container {
    margin-top: 20px;
    padding: 15px;
    background: #f0f4ff;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.status-container.hidden {
    display: none;
}

.status-message {
    color: #667eea;
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 14px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    color: #666;
    font-size: 12px;
}

/* Контейнер помилок */
.error-container {
    margin-top: 20px;
    padding: 15px;
    background: #ffe0e0;
    border-radius: 8px;
    border-left: 4px solid #ff6b6b;
}

.error-container.hidden {
    display: none;
}

#errorMessage {
    color: #d32f2f;
    font-size: 14px;
    margin: 0;
}

/* Контейнер успіху */
.success-container {
    margin-top: 20px;
    padding: 15px;
    background: #e0ffe0;
    border-radius: 8px;
    border-left: 4px solid #4caf50;
}

.success-container.hidden {
    display: none;
}

#successMessage {
    color: #2e7d32;
    font-size: 14px;
    margin: 0;
}

/* Адаптивність */
@media (max-width: 600px) {
    .card {
        padding: 25px;
    }

    h1 {
        font-size: 24px;
    }

    .subtitle {
        font-size: 13px;
    }
}