/* ══════════════════════════════════════
   à Publishing — 아퍼블리싱 출판사
   ══════════════════════════════════════ */

:root {
    --color-bg: #FAFAF8;
    --color-text: #2C2C2C;
    --color-text-light: #6B6B6B;
    --color-accent: #3A9B7A;
    --color-accent-dark: #2E7D63;
    --color-accent-light: #E8F5F0;
    --color-border: #E5E5E0;
    --color-card-bg: #FFFFFF;
    --color-hero-bg: #F0EDE6;
    --font-sans: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Noto Serif KR', Georgia, serif;
    --max-width: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }

/* ── Navigation ── */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(250, 250, 248, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow 0.3s ease;
}
nav.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.06); }

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo { display: flex; align-items: center; }
.nav-logo-img { height: 48px; width: auto; }

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}
.nav-links a {
    color: var(--color-text-light);
    font-size: 1.0rem;
    font-weight: 700;
    transition: color 0.2s;
}
.nav-links a:hover { color: var(--color-accent); }

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 22px; height: 2px;
    background: var(--color-text);
    margin: 5px 0;
    transition: 0.3s;
}

/* ── Hero ── */
.hero {
    padding: 160px 2rem 100px;
    background: var(--color-hero-bg);
    text-align: center;
}
.hero-inner {
    max-width: 700px;
    margin: 0 auto;
}
.hero-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: var(--color-accent-light);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 2rem;
}
.hero h1 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}
.hero h1 em {
    font-style: normal;
    color: var(--color-accent);
}
.hero p {
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 1.8;
    max-width: 560px;
    margin: 0 auto 2.5rem;
}
.hero-meta {
    display: flex;
    justify-content: center;
    gap: 3rem;
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 2rem;
}
.hero-meta strong {
    color: var(--color-text);
    font-weight: 500;
}
.hero-cta {
    display: inline-block;
    padding: 12px 32px;
    background: var(--color-accent);
    color: #fff;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.2s;
}
.hero-cta:hover { background: var(--color-accent-dark); }

/* ── Section ── */
.section {
    padding: 100px 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
}
.section-alt {
    background: var(--color-hero-bg);
    max-width: 100%;
    padding-left: 2rem;
    padding-right: 2rem;
}
.section-alt > * {
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
}
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}
.section-header h2 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}
.section-header p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}
.section-cta {
    text-align: center;
    margin-top: 3rem;
}

/* ── Page Header ── */
.page-header {
    padding: 140px 2rem 60px;
    background: var(--color-hero-bg);
    text-align: center;
}
.page-header h1 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.page-header p {
    color: var(--color-text-light);
}

/* ── Buttons ── */
.btn-outline {
    display: inline-block;
    padding: 10px 28px;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}
.btn-outline:hover {
    background: var(--color-accent);
    color: #fff;
}

/* ── About Grid ── */
.about-grid {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.about-card {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--color-card-bg);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}
.about-icon {
    width: 48px; height: 48px;
    margin: 0 auto 1rem;
    background: var(--color-accent-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}
.about-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.about-card p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.6;
}
.about-content { max-width: 900px; margin: 0 auto; }
.about-story {
    text-align: center;
    margin-bottom: 4rem;
}
.about-story h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}
.about-story p {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

/* ── Book Filters ── */
.book-filters {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}
.filter-btn {
    display: inline-block;
    padding: 8px 20px;
    border: 1px solid var(--color-border);
    background: var(--color-card-bg);
    border-radius: 24px;
    font-size: 0.85rem;
    color: var(--color-text-light);
    cursor: pointer;
    transition: all 0.2s;
}
.filter-btn:hover, .filter-btn.active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

/* ── Book Grid ── */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 2rem;
}
.book-grid-small {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}
.book-card {
    display: flex;
    flex-direction: column;
    background: var(--color-card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.book-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}
.book-cover {
    position: relative;
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, #f5f0e8, #e8e3da);
    overflow: hidden;
}
.book-cover img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.book-card:hover .book-cover img {
    transform: scale(1.03);
}
.book-type-badge {
    position: absolute;
    top: 12px; right: 12px;
    font-size: 0.7rem;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 12px;
    background: rgba(58, 155, 122, 0.9);
    color: #fff;
}
.book-info {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.book-category {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.4rem;
}
.book-title {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 0.3rem;
}
.book-subtitle {
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.5;
    margin-bottom: 0.4rem;
}
.book-author {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: 0.75rem;
}
.book-price {
    margin-top: auto;
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
}

/* ── Book Detail ── */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 100px 2rem 0;
    font-size: 0.9rem;
    color: var(--color-text-light);
    transition: color 0.2s;
}
.back-btn:hover { color: var(--color-accent); }
.detail-hero {
    padding: 20px 2rem 60px;
    background: var(--color-hero-bg);
}
.detail-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 4rem;
    align-items: start;
}
.detail-cover {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
}
.detail-cover img {
    width: 100%;
    display: block;
}
.detail-badges {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}
.badge-category {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 16px;
    background: var(--color-accent-light);
    color: var(--color-accent);
}
.badge-ebook {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 16px;
    background: var(--color-accent);
    color: #fff;
}
.detail-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}
.detail-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}
.detail-author {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}
.detail-price {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 2rem;
}
.detail-specs {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    font-size: 0.9rem;
}
.detail-specs th {
    text-align: left;
    padding: 0.6rem 1rem 0.6rem 0;
    color: var(--color-text-light);
    font-weight: 400;
    width: 80px;
    border-bottom: 1px solid var(--color-border);
}
.detail-specs td {
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--color-border);
}
.detail-actions {
    margin-top: 0.5rem;
}
.actions-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-light);
    margin-bottom: 0.75rem;
}
.buy-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.buy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}
.buy-yes24 {
    background: var(--color-accent);
    color: #fff;
}
.buy-yes24:hover { background: var(--color-accent-dark); }
.buy-aladin {
    background: #5C3D9E;
    color: #fff;
}
.buy-coupang {
    background: #E44D2E;
    color: #fff;
}

.detail-description {
    max-width: 740px;
    margin: 0 auto;
}
.detail-description h2 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
}
.detail-description p {
    color: var(--color-text-light);
    line-height: 1.9;
    font-size: 1rem;
}

/* ── Contact ── */
.contact-grid {
    max-width: 700px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.contact-item {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--color-card-bg);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}
.contact-item .icon { font-size: 1.4rem; margin-bottom: 0.75rem; }
.contact-item .label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}
.contact-item .value { font-size: 0.9rem; font-weight: 500; }
.contact-item a { color: var(--color-accent); }
.contact-item a:hover { text-decoration: underline; }

/* ── Footer ── */
footer {
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; }
.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}
.footer-logo-icon { width: 67px; height: 67px; border-radius: 50%; }
.footer-logo span { display: none; }
.footer-tagline {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}
.footer-links a {
    font-size: 0.8rem;
    color: var(--color-text-light);
    transition: color 0.2s;
}
.footer-links a:hover { color: var(--color-accent); }
.business-info {
    font-size: 0.75rem;
    color: #999;
    line-height: 1.8;
}

/* ── Error Page ── */
.error-page {
    text-align: center;
    padding: 160px 2rem 100px;
}
.error-page h1 {
    font-size: 5rem;
    font-weight: 700;
    color: var(--color-border);
    margin-bottom: 1rem;
}
.error-page p {
    color: var(--color-text-light);
    margin-bottom: 2rem;
}

/* ── Empty State ── */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-light);
}
.empty-state p { margin-bottom: 1.5rem; }

/* ── Animations ── */
.fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px; left: 0; right: 0;
        background: rgba(250,250,248,0.98);
        backdrop-filter: blur(12px);
        padding: 1.5rem 2rem;
        border-bottom: 1px solid var(--color-border);
        gap: 1.2rem;
    }
    .nav-toggle { display: block; }
    .hero { padding: 130px 1.5rem 70px; }
    .hero-meta { flex-direction: column; gap: 0.5rem; }
    .section { padding: 70px 1.5rem; }
    .about-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .book-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; }
    .detail-inner { grid-template-columns: 1fr; gap: 2rem; }
    .detail-cover { max-width: 300px; margin: 0 auto; }
    .detail-title { font-size: 1.5rem; }
}