/* Custom Styles for Image Upload Project */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

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

/* Navigation */
.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

/* Cards */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Buttons */
.btn {
    border-radius: 10px;
    font-weight: 500;
    padding: 10px 20px;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

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

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

/* Upload Area */
.upload-area {
    border: 3px dashed #dee2e6;
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    background-color: #fff;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: #f8f9ff;
}

.upload-area.dragover {
    border-color: var(--success-color);
    background-color: #f0fff4;
}

.upload-icon {
    font-size: 4rem;
    color: #dee2e6;
    margin-bottom: 20px;
}

/* Image Gallery */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.image-item {
    position: relative;
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.image-item:hover {
    transform: scale(1.05);
}

.image-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-item:hover .image-overlay {
    opacity: 1;
}

.image-info {
    padding: 15px;
}

.image-info h6 {
    margin-bottom: 8px;
    font-weight: 600;
}

.image-info small {
    color: #6c757d;
}

/* Loading Spinner */
.loading-spinner {
    display: none;
    text-align: center;
    padding: 20px;
}

/* Progress Bar */
.upload-progress {
    display: none;
    margin-top: 20px;
}

/* Authentication Pages */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    margin: 20px;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.hero-section p {
    font-size: 1.25rem;
    margin-bottom: 30px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .image-gallery {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .upload-area {
        padding: 20px;
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* File Input Styling */
.file-input-wrapper {
    position: relative;
    display: inline-block;
    cursor: pointer;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

/* Alert Customization */
.alert {
    border: none;
    border-radius: 10px;
}

/* Footer */
footer {
    margin-top: auto;
}