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

body {
    font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
    background: #f4f4f6;
    color: #222;
}

/* --- Login --- */
.login-box {
    max-width: 340px;
    margin: 15vh auto;
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    text-align: center;
}

.login-box h1 { margin-bottom: 1.5rem; font-size: 1.4rem; }

.login-box input {
    width: 100%;
    padding: 0.7rem;
    margin-bottom: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
}

.login-box button {
    width: 100%;
    padding: 0.7rem;
    background: #3b82f6;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
}

.login-box button:hover { background: #2563eb; }

.error { color: #dc2626; margin-bottom: 1rem; font-size: 0.9rem; }

/* --- Gallery --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

header h1 { font-size: 1.2rem; }

.header-right { display: flex; align-items: center; gap: 1rem; font-size: 0.9rem; }
.header-right a { color: #3b82f6; text-decoration: none; }

main { padding: 1.5rem; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.75rem;
}

.grid img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 10px;
    display: block;
}

.empty { text-align: center; color: #888; margin-top: 3rem; }