/* Custom styles for YouTube Downloader */

:root {
    --youtube-red: #ff0000;
    --youtube-dark-red: #cc0000;
    --primary-blue: #0d6efd;
    --success-green: #198754;
    --warning-yellow: #ffc107;
    --danger-red: #dc3545;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.container-fluid {
    background: transparent;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--youtube-red) 0%, var(--youtube-dark-red) 100%) !important;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Card Styles */
.card {
    border: none;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Input Styles */
.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    padding: 12px 15px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    transform: translateY(-1px);
}

.input-group-text {
    border-radius: 10px 0 0 10px;
    border: 2px solid #e9ecef;
    border-right: none;
    background: #f8f9fa;
}

/* Button Styles */
.btn {
    border-radius: 10px;
    padding: 12px 24px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #0056b3 100%);
    border-radius: 0 10px 10px 0;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-green) 0%, #146c43 100%);
}

.btn-lg {
    padding: 15px 30px;
    font-size: 1.1rem;
}

/* Progress Bar Styles */
.progress {
    border-radius: 15px;
    background: #e9ecef;
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(90deg, var(--success-green) 0%, #20c997 100%);
    border-radius: 15px;
    transition: width 0.3s ease;
}

/* Thumbnail Styles */
#videoThumbnail {
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

#videoThumbnail:hover {
    transform: scale(1.05);
}

/* Alert Styles */
.alert {
    border-radius: 10px;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c2c7 100%);
    color: #721c24;
}

/* Footer Styles */
footer {
    background: rgba(248, 249, 250, 0.95) !important;
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

/* Loading Animation */
.spinner-border {
    animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .btn-lg {
        padding: 12px 20px;
        font-size: 1rem;
    }
}

/* Smooth Transitions */
* {
    transition: all 0.3s ease;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #0056b3 100%);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #0056b3 0%, var(--primary-blue) 100%);
}

/* Icon Animations */
.fa-youtube {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Form Select Styles */
.form-select {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    padding: 12px 15px;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m1 6 7 7 7-7'/%3e%3c/svg%3e");
}

.form-select:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Success Animation */
@keyframes successPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.success-animation {
    animation: successPulse 0.6s ease-in-out;
}