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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #1a1a2e;
    color: #eee;
    min-height: 100vh;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

h1 {
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 2rem;
    color: #e0c097;
}

.subtitle {
    text-align: center;
    color: #aaa;
    margin-bottom: 2rem;
}

.puzzle-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
}

.puzzle-card {
    background: #16213e;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.puzzle-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.puzzle-card img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    display: block;
}

.puzzle-card .card-body {
    padding: 0.75rem 1rem;
}

.puzzle-card .card-title {
    font-size: 1rem;
    text-transform: capitalize;
}

.upload-section {
    background: #16213e;
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 2rem;
}

.upload-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.upload-controls input[type="file"] {
    flex: 1;
    min-width: 200px;
    color: #ccc;
    font-family: inherit;
}

.upload-btn {
    background: #e0c097;
    color: #1a1a2e;
    border: none;
    border-radius: 8px;
    padding: 0.6rem 1.4rem;
    font-size: 1rem;
    font-family: inherit;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}

.upload-btn:hover {
    background: #c9a77d;
}

.upload-btn:disabled {
    opacity: 0.6;
    cursor: default;
}

.upload-status {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    min-height: 1.2em;
}

.upload-status.error {
    color: #e07070;
}

.order-link {
    display: inline-block;
    font-size: 0.8rem;
    color: #e0c097;
    text-decoration: none;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.order-link:hover {
    opacity: 1;
    text-decoration: underline;
}

.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    color: #888;
}

.empty-state p {
    margin-bottom: 0.5rem;
}