/* つくし堂 (Tsukushido) - Main Stylesheet */

:root {
    /* Color palette - Edo period inspired */
    --color-primary: #8B4513;       /* Saddle brown - like old paper */
    --color-primary-dark: #6B3410;  /* Darker brown for hover states */
    --color-secondary: #D4A574;     /* Tan - warm paper tone */
    --color-accent: #B8860B;        /* Dark goldenrod - gold leaf */
    --color-accent-light: #FFE4B5;  /* Moccasin - light accent */
    --color-text: #2C1810;          /* Very dark brown */
    --color-text-light: #5D4E37;    /* Medium brown */
    --color-bg: #FDF8F0;            /* Cream - old paper background */
    --color-bg-alt: #F5EDE0;        /* Slightly darker cream */
    --color-bg-card: #FFFFFF;
    --color-border: #E8DFD0;
    --color-shadow: rgba(139, 69, 19, 0.15);
    --color-focus-ring: rgba(184, 134, 11, 0.3);

    /* Highlight color for POP cards */
    --pop-yellow: #FFF9C4;

    /* Typography */
    --font-display: "Yuji Syuku", serif;
    --font-handwritten: "Zen Kurenaido", cursive;
    --font-main: "Noto Sans JP", sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* Reset and base styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    font-size: 16px;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    min-height: 100vh;
}

/* Accessibility: Focus styles */
:focus {
    outline: none;
}

:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Accessibility: Skip link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: 9999;
    transition: top var(--transition-normal);
}

.skip-link:focus {
    top: var(--spacing-sm);
}

/* Header */
.site-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #FDF8F0;
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-md);
    text-align: center;
    box-shadow: 0 4px 20px var(--color-shadow);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto var(--spacing-lg);
}

.site-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.title-main {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 400;
    letter-spacing: 0.15em;
}

.title-sub {
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    opacity: 0.8;
}

.site-tagline {
    margin-top: var(--spacing-sm);
    font-family: var(--font-handwritten);
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Navigation */
.main-nav {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: inherit;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: var(--font-main);
    font-size: 1rem;
    line-height: 1;
    text-decoration: none;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
}

.nav-btn.active {
    background: rgba(255, 255, 255, 0.95);
    color: var(--color-primary);
    border-color: transparent;
}

.nav-icon {
    font-size: 1.3rem;
    line-height: 1;
}

.nav-text {
    font-size: 0.8rem;
    font-weight: 500;
    line-height: 1;
}

/* Main content */
.main-content {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    min-height: calc(100vh - 300px);
}

/* Page sections */
.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn var(--transition-slow);
}

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

.page-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.page-desc {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

/* Home page grid */
.home-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.title-icon {
    font-size: 1.2em;
}

/* Pickup section (today's book / gacha) */
.pickup-section {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.pickup-card {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
}

.pickup-card-clickable {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
    cursor: pointer;
    padding: var(--spacing-md);
    margin: calc(-1 * var(--spacing-md));
    border-radius: var(--radius-md);
    transition: background-color var(--transition-normal);
}

.pickup-card-clickable:hover {
    background: var(--color-bg-alt);
}

.pickup-card-clickable:active {
    transform: scale(0.995);
}

.pickup-book-info {
    flex: 1;
}

.pickup-book-title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.pickup-book-summary {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

/* POP Card - The signature design element */
.pop-card {
    background: linear-gradient(135deg, #FFFDE7 0%, #FFF9C4 50%, #FFF59D 100%);
    border-radius: 2px;
    padding: var(--spacing-lg);
    position: relative;
    box-shadow:
        2px 2px 0 rgba(0, 0, 0, 0.05),
        4px 4px 8px rgba(0, 0, 0, 0.1),
        inset 0 0 30px rgba(255, 245, 157, 0.3);
    transform: rotate(-1.5deg);
    max-width: 350px;
    border: 1px solid rgba(200, 180, 100, 0.3);
}

/* Tape effect at top */
.pop-card::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%) rotate(1deg);
    width: 60px;
    height: 20px;
    background: linear-gradient(180deg, rgba(200, 190, 160, 0.7) 0%, rgba(180, 170, 140, 0.5) 100%);
    border-radius: 1px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Paper texture overlay */
.pop-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    border-radius: 2px;
}

.pop-staff {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.pop-staff-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    border: 2px solid var(--color-secondary);
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
}

.pop-staff-name {
    font-family: var(--font-handwritten);
    font-size: 1rem;
    color: var(--color-text);
    font-weight: 500;
}

.pop-staff-role {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.pop-catchcopy {
    font-family: var(--font-handwritten);
    font-size: 1.5rem;
    color: #C62828;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
    text-shadow: 0.5px 0.5px 0 rgba(255, 255, 255, 0.5);
    padding: var(--spacing-sm) 0;
    border-bottom: 2px solid rgba(198, 40, 40, 0.2);
}

/* Marker underline effect */
.pop-catchcopy::before {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 0;
    right: 0;
    height: 8px;
    background: linear-gradient(90deg, rgba(255, 235, 59, 0.6) 0%, rgba(255, 235, 59, 0.3) 100%);
    z-index: -1;
    transform: skewX(-5deg);
}

.pop-comment {
    font-size: 0.9rem;
    color: var(--color-text);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* Featured books section */
.featured-books-section {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.featured-books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

/* Staff section */
.staff-intro-section {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.staff-carousel {
    overflow: hidden;
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    max-width: 100%;
}

.staff-carousel-track {
    display: flex;
    gap: var(--spacing-md);
    animation: scroll-carousel 30s linear infinite;
    width: max-content;
}

.staff-carousel:hover .staff-carousel-track {
    animation-play-state: paused;
}

@keyframes scroll-carousel {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.staff-mini-card {
    flex-shrink: 0;
    width: 140px;
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    border: 2px solid transparent;
}

.staff-mini-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-secondary);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.staff-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
}

.staff-mini-name {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: 2px;
}

.staff-mini-role {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.btn-secondary {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    font-family: var(--font-main);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
}

.btn-primary {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-main);
    font-size: 0.9rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.pickup-book-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

/* Quick actions */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.action-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-main);
}

.action-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: 0 8px 24px var(--color-shadow);
}

.action-icon {
    font-size: 2.5rem;
}

.action-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-primary);
}

.action-desc {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* Staff grid */
.staff-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.staff-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.staff-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.staff-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--color-shadow);
}

.staff-card-header {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.staff-card-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    flex-shrink: 0;
}

.staff-card-info h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin-bottom: 2px;
}

.staff-card-reading {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.staff-card-role {
    font-size: 0.9rem;
    color: var(--color-primary);
}

.staff-card-personality {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.staff-card-backstory {
    font-size: 0.85rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.staff-card-speech {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.staff-card-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.staff-card-btn {
    flex: 1;
}

.staff-card-expertise {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.expertise-tag {
    font-size: 0.75rem;
    padding: 2px 8px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    color: var(--color-text-light);
}

.staff-card-quote {
    font-family: var(--font-handwritten);
    font-size: 1rem;
    color: var(--color-primary);
    padding: var(--spacing-sm);
    background: var(--pop-yellow);
    border-radius: var(--radius-sm);
    position: relative;
}

.staff-card-quote::before {
    content: '"';
    font-size: 1.5rem;
    position: absolute;
    left: 4px;
    top: 0;
    opacity: 0.3;
}

/* Books page */
.books-header {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.books-controls {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.search-box {
    display: flex;
    flex: 1;
    min-width: 200px;
    background: var(--color-bg-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.search-box:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.search-box input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    font-family: var(--font-main);
    font-size: 0.95rem;
    background: transparent;
    outline: none;
}

.search-box button {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.search-box button:hover {
    background: var(--color-primary-dark);
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-main);
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.filter-select:hover {
    border-color: var(--color-secondary);
}

.filter-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-focus-ring);
    outline: none;
}

.active-filter {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--pop-yellow);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.filter-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.filter-value {
    font-weight: 500;
    color: var(--color-primary);
}

.clear-filter {
    margin-left: auto;
    width: 24px;
    height: 24px;
    border: none;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
}

/* Books grid */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

/* Book card */
.book-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border);
    position: relative;
}

.book-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px var(--color-shadow);
}

.book-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.book-summary {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.book-pop-mini {
    background: linear-gradient(135deg, #FFFDE7 0%, #FFF9C4 100%);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    transform: rotate(-0.5deg);
    border: 1px solid rgba(200, 180, 100, 0.2);
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.05);
}

.book-pop-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: white;
    flex-shrink: 0;
    margin-top: 2px;
}

.book-pop-text {
    font-family: var(--font-handwritten);
    font-size: 1rem;
    color: #C62828;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.book-tag {
    font-size: 0.75rem;
    padding: 2px 8px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    color: var(--color-text-light);
}

/* Loading state */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xxl);
    color: var(--color-text-light);
}

.loading.hidden {
    display: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

.loading-placeholder {
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--color-text-light);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.page-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-main);
    font-size: 0.9rem;
    color: var(--color-text);
    transition: all 0.2s ease;
}

.page-btn:hover:not(:disabled) {
    background: var(--color-secondary);
    border-color: var(--color-primary);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.page-info {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* Section header with inline button */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.section-header .section-title {
    margin-bottom: 0;
}

/* Home search box (in bookshelf section header) */
.home-search-box {
    display: flex;
    background: var(--color-bg-alt);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.home-search-box:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.home-search-box input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    font-family: var(--font-main);
    font-size: 0.9rem;
    background: transparent;
    outline: none;
    width: 160px;
}

.home-search-box button {
    padding: var(--spacing-sm);
    background: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.home-search-box button:hover {
    background: var(--color-primary-dark);
}

@media (max-width: 768px) {
    .featured-books-section .section-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }

    .home-search-box {
        width: 100%;
    }

    .home-search-box input {
        flex: 1;
        width: auto;
    }
}

/* Gacha icon button (used in pickup section header) */
.gacha-btn-icon-only {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #8B6914 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(184, 134, 11, 0.3);
}

.gacha-btn-icon-only:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 4px 12px rgba(184, 134, 11, 0.4);
}

.gacha-btn-icon-only:active {
    transform: scale(0.95);
}

.gacha-btn-icon-only .gacha-btn-icon {
    font-size: 1.2rem;
    line-height: 1;
}

/* Modal */
.book-modal,
.staff-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    visibility: hidden;
    opacity: 0;
    transition: all var(--transition-slow);
}

.book-modal.active,
.staff-modal.active {
    visibility: visible;
    opacity: 1;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(44, 24, 16, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    max-width: 700px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    padding: var(--spacing-xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: translateY(20px);
    transition: transform var(--transition-slow);
}

.book-modal.active .modal-content,
.staff-modal.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 36px;
    height: 36px;
    border: none;
    background: var(--color-bg-alt);
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--color-text-light);
    transition: all 0.2s ease;
    z-index: 10;
}

.modal-close:hover {
    background: var(--color-primary);
    color: white;
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    padding-right: var(--spacing-xl);
}

.modal-summary {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

.modal-pop {
    margin-bottom: var(--spacing-lg);
}

.modal-connections {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.modal-connections-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.connection-card {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    border-left: 3px solid var(--color-secondary);
    position: relative;
}

.connection-card:hover {
    background: var(--color-secondary);
    border-left-color: var(--color-primary);
}

.connection-card::before {
    content: '→';
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-light);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.connection-card:hover::before {
    opacity: 1;
}

.connection-title {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.connection-reason {
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.6;
    padding-right: var(--spacing-lg);
}

.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.modal-tag {
    font-size: 0.85rem;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-light);
    cursor: pointer;
    transition: all 0.2s ease;
}

.modal-tag:hover {
    background: var(--color-secondary);
    border-color: var(--color-primary);
}

.modal-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.modal-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-alt);
    color: var(--color-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    border: 2px solid var(--color-border);
    transition: all 0.2s ease;
}

.modal-link:hover {
    background: var(--color-secondary);
    border-color: var(--color-primary);
}

.modal-link-primary {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.modal-link-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

/* Book Detail Page */
.book-detail-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
}

.book-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-main);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-back:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.book-detail-share {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-share {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-bg-alt);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-share:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.book-detail-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.4;
}

.book-detail-pop {
    margin-bottom: var(--spacing-lg);
}

.book-detail-pop .pop-card {
    max-width: 100%;
}

.book-detail-summary {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

.book-detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.book-detail-tags .book-tag {
    font-size: 0.85rem;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-light);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.book-detail-tags .book-tag:hover {
    background: var(--color-secondary);
    border-color: var(--color-primary);
}

.book-detail-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.book-detail-connections {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.connections-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

@media (max-width: 768px) {
    .book-detail-container {
        padding: var(--spacing-lg);
    }

    .book-detail-title {
        font-size: 1.4rem;
    }

    .book-detail-links {
        flex-direction: column;
    }

    .book-detail-links .modal-link {
        justify-content: center;
    }
}

/* About Page */
.about-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
}

.about-container h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.about-container h2 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--color-text);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-secondary);
}

.about-container h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--color-text);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.about-container p {
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.about-container a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.about-container a:hover {
    text-decoration: underline;
}

.about-container ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.about-container li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

/* Concierge Page */
.concierge-container {
    max-width: 800px;
    margin: 0 auto;
}

.concierge-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.concierge-staff-select {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.staff-select-label {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1rem;
}

.staff-select-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

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

.staff-select-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.staff-select-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-secondary);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.staff-select-card .staff-avatar {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-sm);
}

.staff-select-card .staff-name {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: 2px;
}

.staff-select-card .staff-role {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.staff-select-card .staff-expertise {
    font-size: 0.7rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
    text-align: center;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Concierge Chat */
.concierge-chat {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    height: 80vh;
    min-height: 600px;
}

.chat-staff-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 3px solid var(--color-primary);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.chat-staff-header .staff-avatar {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
}

.chat-staff-header .staff-info {
    flex: 1;
}

.chat-staff-header .staff-name {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-text);
}

.chat-staff-header .staff-role {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.chat-staff-header .staff-expertise {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.chat-message {
    max-width: 85%;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    line-height: 1.7;
}

.chat-message.user {
    align-self: flex-end;
    background: var(--color-primary);
    color: white;
    border-bottom-right-radius: var(--radius-sm);
}

.chat-message.staff {
    align-self: flex-start;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-bottom-left-radius: var(--radius-sm);
}

.chat-message.staff .message-content {
    white-space: pre-wrap;
}

.chat-message.loading {
    align-self: flex-start;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
}

.chat-message.loading::after {
    content: '...';
    animation: dots 1.5s infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

.chat-books {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.chat-books-title {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.chat-book-card {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    color: inherit;
}

.chat-book-card:hover {
    background: var(--color-secondary);
    border-color: var(--color-primary);
}

.chat-book-card .book-title {
    font-family: var(--font-display);
    font-size: 0.95rem;
    color: var(--color-primary);
    margin-bottom: 2px;
}

.chat-book-card .book-summary {
    font-size: 0.8rem;
    color: var(--color-text-light);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.chat-input-container {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-alt);
}

.chat-input-container input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-main);
    font-size: 1rem;
    background: var(--color-bg-card);
    transition: border-color var(--transition-normal);
}

.chat-input-container input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.chat-input-container button {
    padding: var(--spacing-md);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-input-container button:hover {
    background: var(--color-primary-dark);
}

.chat-input-container button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.change-staff-btn {
    margin: var(--spacing-md) var(--spacing-lg);
    flex-shrink: 0;
    width: calc(100% - var(--spacing-lg) * 2);
    align-self: center;
    box-sizing: border-box;
}

/* About Link Section (Home Page) */
.about-link-section {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.about-link-text {
    color: var(--color-text);
    line-height: 1.8;
    font-size: 0.95rem;
}

.about-link-text a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    margin-left: var(--spacing-sm);
}

.about-link-text a:hover {
    text-decoration: underline;
}

/* Footer */
.site-footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    color: var(--color-text-light);
    font-size: 0.85rem;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-xxl);
}

.site-footer p {
    margin-bottom: var(--spacing-sm);
}

.site-footer p:last-child {
    margin-bottom: 0;
}

.site-footer a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.site-footer a:hover {
    text-decoration: underline;
}

.footer-note {
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    opacity: 0.8;
}

/* Responsive design */
@media (max-width: 768px) {
    .title-main {
        font-size: 2rem;
    }

    .nav-btn {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .main-content {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .pickup-card,
    .pickup-card-clickable {
        flex-direction: column;
    }

    .pop-card {
        max-width: 100%;
        transform: rotate(0);
        margin-top: var(--spacing-md);
    }

    .pickup-card-clickable .pop-card {
        margin-top: 0;
    }

    .books-grid {
        grid-template-columns: 1fr;
    }

    .staff-grid {
        grid-template-columns: 1fr;
    }

    .quick-actions {
        grid-template-columns: 1fr;
    }

    .modal-links {
        flex-direction: column;
    }

    .modal-link {
        justify-content: center;
    }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* Touch targets for mobile */
@media (pointer: coarse) {
    .nav-btn {
        min-height: 44px;
        min-width: 44px;
    }

    .modal-tag {
        min-height: 44px;
        padding: var(--spacing-sm) var(--spacing-md);
        display: inline-flex;
        align-items: center;
    }

    .page-btn {
        min-height: 44px;
        min-width: 44px;
    }

    .clear-filter {
        width: 44px;
        height: 44px;
    }

    .modal-close {
        width: 44px;
        height: 44px;
    }

    .gacha-btn-icon-only {
        width: 44px;
        height: 44px;
    }
}

/* Active states for mobile tap feedback */
.btn-primary:active {
    transform: scale(0.97);
}

.btn-secondary:active {
    transform: scale(0.97);
}

.book-card:active {
    transform: scale(0.98);
}

.staff-card:active {
    transform: scale(0.98);
}

.staff-mini-card:active {
    transform: scale(0.95);
}

.connection-card:active {
    transform: scale(0.98);
}

.nav-btn:active {
    transform: scale(0.95);
}

.modal-tag:active {
    transform: scale(0.95);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .staff-carousel-track {
        animation: none;
    }

    .page.active {
        animation: none;
    }

    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}