:root {
    --bg: #11110f;
    --bg-deep: #0b0b0a;
    --panel: #191916;
    --panel-soft: #1f1e1a;
    --line: #343026;
    --text: #e8dfce;
    --muted: #aaa18f;
    --dim: #777061;
    --accent: #d3ad55;
    --accent-hot: #f0d27a;
    --accent-dark: #8d6b2e;
}

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

body {
    background: radial-gradient(circle at 50% 0%, rgba(211, 173, 85, 0.13), transparent 36rem),
                linear-gradient(180deg, #151411 0%, var(--bg) 42%, var(--bg-deep) 100%);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
    padding-bottom: 50px;
    min-height: 100vh;
}

/* Header */
.store-header {
    padding: 30px 20px;
    text-align: center;
}

.logo {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 32px;
    font-weight: 520;
    margin-bottom: 4px;
}

.logo span {
    background: linear-gradient(100deg, var(--accent-dark), var(--accent-hot) 42%, #fff1a3 50%, var(--accent) 64%, var(--accent-dark));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subtitle {
    color: var(--muted);
    font-size: 14px;
}

/* Tabs */
.store-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 10px 20px 20px;
    position: sticky;
    top: 0;
    background: rgba(17, 17, 15, 0.85);
    backdrop-filter: blur(8px);
    z-index: 10;
    border-bottom: 1px solid var(--line);
}

.tab-btn {
    background: var(--panel-soft);
    color: var(--muted);
    border: 1px solid var(--line);
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn.active {
    background: rgba(211, 173, 85, 0.12);
    color: var(--accent-hot);
    border-color: var(--accent);
}

/* Grid */
.store-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 600px) {
    .store-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .store-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
}

/* Product Card */
.book-card {
    background: rgba(25, 25, 22, 0.62);
    border-radius: 5px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.book-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
    border-color: rgba(211, 173, 85, 0.3);
}

/* Image wrappers for zero-crop */
.book-cover-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
    background: var(--bg-deep);
    border-bottom: 1px solid var(--line);
}

.book-cover-blur {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    object-fit: cover;
    filter: blur(15px) brightness(0.4);
    z-index: 1;
}

.book-cover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    z-index: 2;
    padding: 5px; /* Slight padding to breathe */
}

.book-info {
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.book-series {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 800;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.book-title {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 22px;
    font-weight: 520;
    margin-bottom: 8px;
    line-height: 1.1;
    color: var(--text);
}

.badges-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.book-format {
    display: inline-block;
    font-size: 11px;
    padding: 3px 8px;
    background: rgba(211, 173, 85, 0.1);
    border: 1px solid rgba(211, 173, 85, 0.3);
    border-radius: 4px;
    color: var(--accent-hot);
    width: fit-content;
}

.book-genre {
    display: inline-block;
    font-size: 11px;
    padding: 3px 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    color: var(--muted);
    width: fit-content;
}

.info-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(17, 17, 15, 0.7);
    border: 1px solid rgba(211, 173, 85, 0.4);
    color: var(--accent-hot);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.info-btn:hover {
    background: rgba(211, 173, 85, 0.2);
    border-color: var(--accent);
    transform: scale(1.05);
}

.info-btn.active {
    background: var(--accent);
    color: #111;
}

.book-description-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 11, 10, 0.85);
    backdrop-filter: blur(6px);
    z-index: 5;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.book-description-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.book-description-content {
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
    text-align: center;
    text-shadow: 0 2px 4px rgba(0,0,0,0.8);
    max-height: 100%;
    overflow-y: auto;
}

/* Scrollbar for description */
.book-description-content::-webkit-scrollbar {
    width: 4px;
}
.book-description-content::-webkit-scrollbar-thumb {
    background: var(--accent-dark);
    border-radius: 4px;
}

/* Footer / Buy Area */
.book-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--line-soft);
}

.book-price {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 20px;
    font-weight: 520;
    color: var(--text);
}

.buy-btn {
    background: linear-gradient(110deg, var(--accent-dark), var(--accent-hot) 42%, #fff1a3 50%, var(--accent) 68%, var(--accent-dark));
    color: #171208;
    border: 1px solid var(--accent);
    padding: 8px 18px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(211, 173, 85, 0.2);
}

.buy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(211, 173, 85, 0.4);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.book-card {
    animation: fadeIn 0.4s ease forwards;
}

.litres-btn {
    background: linear-gradient(110deg, #1b538e, #297dd2 42%, #75b5f3 50%, #297dd2 68%, #1b538e);
    border: 1px solid #297dd2;
    color: #fff;
    box-shadow: 0 2px 8px rgba(41, 125, 210, 0.2);
}

.litres-btn:hover {
    box-shadow: 0 4px 16px rgba(41, 125, 210, 0.4);
    color: #fff;
}