/* WBLBR FlipBook - Public Styles - Apple-inspired Glassmorphism */
:root {
    --primary: #007aff;
    --gray-100: #f5f5f7;
    --gray-200: #e8e8ed;
    --gray-400: #aeaeb2;
    --gray-500: #8e8e93;
    --gray-700: #48484a;
    --gray-800: #2c2c2e;
    --radius: 16px;
    --glass: rgba(255,255,255,.65);
    --glass-border: rgba(255,255,255,.6);
    --gradient-bg: linear-gradient(145deg, #dbeafe 0%, #ede9fe 25%, #fce7f3 50%, #e0f2fe 75%, #d1fae5 100%);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: var(--gradient-bg); background-attachment: fixed;
    color: var(--gray-800); line-height: 1.6; min-height: 100vh;
}
.container { max-width: 1000px; margin: 0 auto; padding: 0 1.5rem; }

.site-header {
    padding: 1.5rem 0; margin-bottom: 1.5rem;
    background: rgba(255,255,255,.45);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,.5);
    position: sticky; top: 0; z-index: 10;
}
.site-title { font-size: 1.15rem; font-weight: 700; letter-spacing: -.02em; }

.catalog-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 200px));
    gap: 1.25rem; padding-bottom: 3rem;
}
.catalog-card {
    display: flex; flex-direction: column;
    background: var(--glass); border: 1px solid var(--glass-border);
    border-radius: var(--radius); overflow: hidden;
    text-decoration: none; color: var(--gray-800);
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 2px 16px rgba(0,0,0,.04);
    transition: all .25s ease;
}
.catalog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,.1);
    border-color: rgba(0,122,255,.25);
}

.catalog-card-thumb {
    height: 180px; overflow: hidden; background: var(--gray-100);
    display: flex; align-items: center; justify-content: center;
}
.catalog-card-thumb img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform .4s ease;
}
.catalog-card:hover .catalog-card-thumb img { transform: scale(1.05); }
.catalog-card-placeholder { color: var(--gray-400); }

.catalog-card-body { padding: .7rem .85rem .85rem; }
.catalog-card-body h2 { font-size: .88rem; font-weight: 600; margin-bottom: .15rem; line-height: 1.3; letter-spacing: -.01em; }
.catalog-card-body p { font-size: .78rem; color: var(--gray-500); margin-bottom: .25rem; line-height: 1.35; }
.catalog-pages { font-size: .72rem; color: var(--gray-400); font-weight: 500; }

.error-page { text-align: center; padding: 5rem 1rem; }
.error-page h1 { font-size: 5rem; font-weight: 800; color: rgba(0,0,0,.06); letter-spacing: -.05em; }
.error-page p { color: var(--gray-500); margin: .75rem 0 1.5rem; }
.btn {
    display: inline-flex; align-items: center; padding: .5rem 1.1rem;
    background: var(--glass); border: 1px solid var(--glass-border);
    border-radius: 10px; text-decoration: none; color: var(--gray-700);
    font-size: .85rem; font-weight: 500;
    backdrop-filter: blur(8px); transition: all .2s;
}
.btn:hover { background: rgba(255,255,255,.85); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,.06); }
.btn-primary { background: var(--primary); color: #fff; border-color: transparent; }

.empty-state { color: var(--gray-500); text-align: center; padding: 4rem 1rem; }

@media (max-width: 600px) {
    .catalog-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 1rem; }
    .catalog-card-thumb { height: 150px; }
}