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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --bg-color: #ecf0f1;
    --text-color: #333;
    --border-radius: 8px;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

/* Navbar */
.navbar {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-main {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0;
    color: white;
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 0.75rem;
    font-weight: 400;
    margin: 0;
    color: #ecf0f1;
    letter-spacing: 0.5px;
}

/* Fallback voor als logo niet laadt */
.logo {
    font-size: 1.5rem;
    font-weight: 600;
    display: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--secondary-color);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 0;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    color: #666;
}

/* Gallery */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px 0;
    margin-bottom: 40px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    background-color: white;
    aspect-ratio: 1;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Loading & No Photos */
.loading,
.no-photos {
    text-align: center;
    padding: 3rem;
    font-size: 1.2rem;
    color: #666;
}

.no-photos p {
    margin-bottom: 1rem;
}

/* Upload Section */
.upload-section {
    max-width: 600px;
    margin: 3rem auto;
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.upload-section h2 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.upload-section p {
    margin-bottom: 2rem;
    color: #666;
}

.upload-section .info-text {
    font-size: 0.9rem;
    color: #95a5a6;
    margin-bottom: 1rem;
    font-style: italic;
}

.upload-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* File Input */
.file-input-wrapper {
    position: relative;
}

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

.file-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--bg-color);
    border: 2px dashed var(--secondary-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s;
}

.file-label:hover {
    background: #e3f2fd;
    border-color: var(--primary-color);
}

#file-name {
    color: #666;
}

.browse-btn {
    background: var(--secondary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
}

/* Preview */
.preview-container {
    text-align: center;
}

.preview-img {
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

/* Buttons */
.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--secondary-color);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-primary:disabled {
    background: #95a5a6;
    cursor: not-allowed;
    transform: none;
}

/* Message */
.message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    display: none;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

/* Spinner */
.spinner {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top: 3px solid white;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-left: 10px;
}

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

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
}

.lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content {
    max-width: 90%;
    max-height: 85vh;
    object-fit: contain;
    animation: zoom 0.3s;
}

@keyframes zoom {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--accent-color);
}


.lightbox-nav button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    font-size: 30px;
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: background 0.3s;
}

.lightbox-nav button:hover {
    background: rgba(255, 255, 255, 0.4);
}

.lightbox-nav .prev {
    left: 20px;
}

.lightbox-nav .next {
    right: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .logo-section {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }

    .logo-img {
        height: 40px;
    }

    .logo-main {
        font-size: 1.2rem;
    }

    .logo-sub {
        font-size: 0.7rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .lightbox-nav button {
        font-size: 20px;
        padding: 0.5rem 1rem;
    }

    .close {
        right: 20px;
        font-size: 30px;
    }
}