:root {
    --primary-color: #10b981; /* Green */
    --primary-hover: #059669;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.container {
    width: 100%;
    max-width: 800px;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #111827;
}

header p {
    color: var(--text-light);
}

.upload-card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    text-align: center;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 0.75rem;
    padding: 3rem 2rem;
    transition: all 0.3s ease;
    cursor: pointer;
    background-color: #fafafa;
}

.drop-zone.dragover {
    border-color: var(--primary-color);
    background-color: #ecfdf5;
}

.icon-container {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.drop-zone h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.hint {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 1rem;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.upload-status {
    margin-top: 1rem;
    font-size: 0.9rem;
}

.upload-status.success {
    color: var(--primary-color);
}

.upload-status.error {
    color: #ef4444;
}

.recent-uploads h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.gallery-item {
    aspect-ratio: 1;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    background: var(--card-bg);
}

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