:root {
    --bg-color: #f7f8fa;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --accent-gold: #a67c1e; /* Darker gold for better contrast on light backgrounds */
    --card-bg: #ffffff;
    --card-border: #e5e7eb;
    
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-serif: 'Cinzel', Georgia, Cambria, serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 8vh 20px 4vh;
}

.search-wrap {
    width: 100%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    color: #111827;
    letter-spacing: 2px;
    margin-bottom: 8px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

header p {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 300;
}

form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.search-input-group {
    display: flex;
    gap: 12px;
    width: 100%;
}

input {
    flex-grow: 1;
    padding: 16px 20px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background-color: #ffffff;
    color: #1f2937;
    font-family: var(--font-sans);
    font-size: 1rem;
    outline: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input:focus {
    border-color: var(--accent-gold);
    box-shadow: 0 2px 12px rgba(166, 124, 30, 0.08);
}

button {
    padding: 16px 28px;
    border-radius: 8px;
    border: none;
    background-color: var(--accent-gold);
    color: #ffffff;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(166, 124, 30, 0.2);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

button:hover {
    opacity: 0.95;
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
}

.results-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.book-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 20px;
    border-radius: 8px;
    display: flex;
    gap: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.book-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.book-card img {
    width: 70px;
    height: 105px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.book-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.book-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: #111827;
    margin-bottom: 6px;
}

.book-author {
    font-size: 0.95rem;
    color: var(--accent-gold);
    margin-bottom: 6px;
    font-weight: 500;
}

.book-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Dedicated Product Page Styling --- */
.product-page-wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px;
}

.product-header {
    margin-bottom: 32px;
}

.back-btn {
    font-size: 1rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
    font-weight: 500;
}

.back-btn:hover {
    color: var(--accent-gold);
}

.product-container {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 48px;
    align-items: start;
}

@media (max-width: 768px) {
    .product-container {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

.product-media img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--card-border);
}

.product-info-panel {
    display: flex;
    flex-direction: column;
}

.product-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: #111827;
    margin-bottom: 8px;
    line-height: 1.15;
}

.product-author {
    font-size: 1.3rem;
    color: var(--accent-gold);
    font-weight: 600;
    margin-bottom: 16px;
}

.product-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.rating-badge {
    background-color: #fef3c7;
    color: #d97706;
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
}

.meta-item {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.product-genres {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.genre-tag {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.85rem;
    font-weight: 500;
}

.product-section {
    margin-bottom: 32px;
}

.product-section h2 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: #111827;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.product-description {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
}

.product-divider {
    border: 0;
    height: 1px;
    background-color: var(--card-border);
    margin: 32px 0;
}

/* --- Recommendations Grid --- */
.recommendations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 20px;
}

.rec-card {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    transition: transform 0.2s ease;
}

.rec-card:hover {
    transform: translateY(-4px);
}

.rec-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 6px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    margin-bottom: 8px;
    border: 1px solid var(--card-border);
}

.rec-title {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: #111827;
    font-weight: 600;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 4px;
}

.rec-author {
    font-size: 0.8rem;
    color: var(--accent-gold);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.loading-placeholder, .no-recommendations, .error-placeholder {
    color: var(--text-muted);
    font-size: 1rem;
    padding: 20px 0;
}


/* --- Search Strategy Selector Controls --- */
.strategy-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 4px;
}

@media (max-width: 600px) {
    .strategy-selector {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}

.strategy-option {
    cursor: pointer;
    position: relative;
}

.strategy-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.strategy-card {
    display: flex;
    flex-direction: column;
    padding: 12px 16px;
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.strategy-option input[type="radio"]:checked + .strategy-card {
    border-color: var(--accent-gold);
    background-color: #fefefb;
    box-shadow: 0 4px 12px rgba(166, 124, 30, 0.06);
}

.strategy-option:hover input[type="radio"]:not(:checked) + .strategy-card {
    border-color: #d1d5db;
    background-color: #fcfcfc;
}

.mode-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 2px;
}

.mode-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.3;
}

/* --- Search Statistics Panel --- */
.search-stats {
    background-color: #f3f4f6;
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    padding: 10px 16px;
    border-radius: 6px;
    font-size: 0.88rem;
    margin-bottom: 24px;
    animation: fadeIn 0.3s ease;
}

.search-stats.hidden {
    display: none;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* --- Settings Trigger Button --- */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.settings-trigger-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    transition: all 0.2s ease;
}

.settings-trigger-btn:hover {
    background-color: #f9f9f9;
    border-color: #d1d5db;
    color: var(--text-primary);
}

.gear-icon {
    font-size: 1.1rem;
    transition: transform 0.4s ease;
}

.settings-trigger-btn:hover .gear-icon {
    transform: rotate(45deg);
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

/* --- Settings Modal & General Overlay --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(17, 24, 39, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    width: 90%;
    max-width: 520px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    padding: 32px;
    position: relative;
    animation: modalSlide 0.3s ease;
}

@keyframes modalSlide {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close-btn {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    box-shadow: none;
    transition: color 0.2s ease;
}

.modal-close-btn:hover {
    color: var(--text-primary);
    transform: none;
}

.modal-close-btn:active {
    transform: none;
}

.modal-divider {
    border: 0;
    height: 1px;
    background-color: var(--card-border);
    margin: 20px 0;
}

.modal-content h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: #111827;
}

/* --- Setting Controls Form --- */
.setting-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.setting-group label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.settings-select {
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background-color: #ffffff;
    color: #111827;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    outline: none;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    transition: border-color 0.2s ease;
}

.settings-select:focus {
    border-color: var(--accent-gold);
}

.settings-save-btn {
    width: 100%;
    padding: 14px 20px;
    border-radius: 8px;
    border: none;
    background-color: var(--accent-gold);
    color: #ffffff;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(166, 124, 30, 0.15);
    margin-top: 10px;
    transition: all 0.2s ease;
}

.settings-save-btn:hover {
    background-color: #8c6819;
    box-shadow: 0 6px 16px rgba(166, 124, 30, 0.2);
}