/*
Theme Name:   NerbitinBuku
Theme URI:    https://nerbitinbuku.com
Description:  Tema WordPress mandiri untuk nerbitinbuku.com (tanpa parent theme, tanpa Elementor). Katalog buku, blog, dan CTA WhatsApp.
Author:       nerbitinbuku.com
Author URI:   https://nerbitinbuku.com
Version:      2.0.0
Requires at least: 6.3
Requires PHP: 7.4
License:      GNU General Public License v2 or later
License URI:  https://www.gnu.org/licenses/gpl-2.0.html
Text Domain:  nerbitinbuku
Tags:         blog, custom-menu, custom-logo, featured-images, threaded-comments, translation-ready, publishing
*/

/* ==========================================================================
   DESIGN TOKENS
   ========================================================================== */
:root {
    --nb-bg-main:              #1e40af;
    --nb-bg-alt:               #152c7a;
    --nb-bg-card:              #172554;
    --nb-bg-dark:              #0f172a;
    --nb-bg-footer:            #0b1120;
    --nb-highlight:            #fbbf24;
    --nb-highlight-hover:      #d97706;
    --nb-text-light:           #f8fafc;
    --nb-text-muted:           #cbd5e1;
    --nb-text-dark:            #0f172a;
    --nb-wa-green:             #25D366;
    --nb-wa-hover:             #1ebd5c;
    --nb-border:               rgba(255,255,255,0.1);
    --nb-radius:               12px;
    --nb-radius-lg:            20px;
    --nb-transition:           0.3s ease;
    --nb-shadow-highlight:     0 10px 25px -5px rgba(251,191,36,0.5);
    --nb-shadow-card:          0 20px 40px -10px rgba(0,0,0,0.4);
}

/* ==========================================================================
   RESET & BASE (menggantikan reset bawaan Hello Elementor)
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
    margin: 0;
    background-color: var(--nb-bg-main);
    color: var(--nb-text-light);
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 { margin: 0 0 .6em; line-height: 1.25; font-weight: 700; }
p { margin: 0 0 1.1em; }
img, svg, video { max-width: 100%; height: auto; }
figure { margin: 0; }
a { color: inherit; text-decoration: none; transition: color var(--nb-transition); }
button, input, select, textarea { font: inherit; }
ul, ol { margin: 0 0 1.1em; padding-left: 1.25em; }
table { width: 100%; border-collapse: collapse; margin-bottom: 1.25em; }
th, td { padding: 10px 12px; border: 1px solid #e2e8f0; text-align: left; }

:focus-visible { outline: 3px solid var(--nb-highlight); outline-offset: 2px; }

.screen-reader-text {
    border: 0; clip: rect(1px, 1px, 1px, 1px); clip-path: inset(50%);
    height: 1px; width: 1px; margin: -1px; overflow: hidden; padding: 0;
    position: absolute; word-wrap: normal !important;
}
.screen-reader-text:focus {
    background: #fff; color: #0f172a; clip: auto; clip-path: none;
    height: auto; width: auto; left: 8px; top: 8px; padding: 12px 20px;
    z-index: 100000; border-radius: 6px; font-weight: 700;
}

.nb-container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ==========================================================================
   HEADER & NAVBAR
   ========================================================================== */
.site-header {
    background: rgba(30,64,175,0.92);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    border-bottom: 1px solid var(--nb-border);
    position: sticky;
    top: 0;
    z-index: 9999;
}
.admin-bar .site-header { top: 32px; }
@media (max-width: 782px) { .admin-bar .site-header { top: 46px; } }

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 14px 24px;
}

.site-branding { display: flex; align-items: center; min-width: 0; }
.site-branding .custom-logo-link { display: inline-flex; }
.site-branding .custom-logo { max-height: 50px; width: auto; }
.site-title {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.2;
}
.site-title a { color: var(--nb-text-light); }

.main-navigation { display: flex; align-items: center; gap: 24px; }
.main-navigation ul { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 28px; }
.main-navigation li { position: relative; }
.main-navigation a {
    color: var(--nb-text-light);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 6px 0;
    display: inline-block;
}
.main-navigation a:hover,
.main-navigation .current-menu-item > a,
.main-navigation .current-menu-ancestor > a,
.main-navigation .current_page_item > a { color: var(--nb-highlight); }

/* Submenu */
.main-navigation .sub-menu {
    position: absolute; top: 100%; left: 0; min-width: 210px;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--nb-bg-dark); border: 1px solid var(--nb-border);
    border-radius: var(--nb-radius); padding: 8px 0;
    opacity: 0; visibility: hidden; transform: translateY(6px);
    transition: opacity var(--nb-transition), transform var(--nb-transition), visibility var(--nb-transition);
    box-shadow: var(--nb-shadow-card);
}
.main-navigation li:hover > .sub-menu,
.main-navigation li:focus-within > .sub-menu { opacity: 1; visibility: visible; transform: none; }
.main-navigation .sub-menu a { display: block; padding: 9px 18px; font-weight: 500; }

/* Tombol CTA di navbar */
.nb-btn-nav {
    display: inline-block;
    background: var(--nb-highlight);
    color: var(--nb-text-dark) !important;
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.9rem;
    white-space: nowrap;
    box-shadow: 0 4px 15px -3px rgba(251,191,36,0.5);
    transition: all var(--nb-transition);
}
.nb-btn-nav:hover { background: var(--nb-highlight-hover); transform: translateY(-2px); }

/* Tombol hamburger (mobile) */
.nb-menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--nb-border);
    border-radius: 8px;
    color: var(--nb-text-light);
    width: 44px; height: 44px;
    cursor: pointer;
    align-items: center; justify-content: center;
}
.nb-menu-toggle__bars,
.nb-menu-toggle__bars::before,
.nb-menu-toggle__bars::after {
    display: block; width: 20px; height: 2px; background: currentColor;
    border-radius: 2px; transition: transform var(--nb-transition), background var(--nb-transition);
}
.nb-menu-toggle__bars { position: relative; }
.nb-menu-toggle__bars::before,
.nb-menu-toggle__bars::after { content: ''; position: absolute; left: 0; }
.nb-menu-toggle__bars::before { top: -6px; }
.nb-menu-toggle__bars::after  { top:  6px; }
.nb-menu-toggle[aria-expanded="true"] .nb-menu-toggle__bars { background: transparent; }
.nb-menu-toggle[aria-expanded="true"] .nb-menu-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nb-menu-toggle[aria-expanded="true"] .nb-menu-toggle__bars::after  { top: 0; transform: rotate(-45deg); }

@media (max-width: 900px) {
    .nb-menu-toggle { display: inline-flex; }
    .main-navigation {
        position: absolute; top: 100%; left: 0; right: 0;
        flex-direction: column; align-items: stretch; gap: 0;
        background: var(--nb-bg-dark);
        border-bottom: 1px solid var(--nb-border);
        padding: 8px 24px 20px;
        display: none;
    }
    .main-navigation.is-open { display: flex; }
    .main-navigation ul { flex-direction: column; align-items: stretch; gap: 0; }
    .main-navigation li > a { display: block; padding: 12px 0; border-bottom: 1px solid var(--nb-border); }
    .main-navigation .sub-menu {
        position: static; opacity: 1; visibility: visible; transform: none;
        background: transparent; border: 0; box-shadow: none; padding: 0 0 0 16px;
    }
    .main-navigation .nb-btn-nav { margin-top: 16px; text-align: center; }
}

/* ==========================================================================
   LEGACY UTILITY CLASSES (tombol, section, kartu, tipografi, form)
   Dipertahankan agar halaman/blok yang memakai class nb-* tetap tampil sama.
   ========================================================================== */
/* ==========================================================================
   BUTTONS
   ========================================================================== */

/* Tombol utama kuning */
.nb-btn-primary,
.wp-block-button .nb-btn-primary {
    background: var(--nb-highlight) !important;
    color: var(--nb-text-dark) !important;
    border: none !important;
    border-radius: 50px !important;
    font-weight: 700 !important;
    box-shadow: var(--nb-shadow-highlight) !important;
    transition: all var(--nb-transition) !important;
}

.nb-btn-primary:hover {
    background: var(--nb-highlight-hover) !important;
    color: var(--nb-text-dark) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 15px 30px -5px rgba(251,191,36,0.6) !important;
}


/* Tombol outline kuning */
.nb-btn-outline {
    background: transparent !important;
    color: var(--nb-highlight) !important;
    border: 2px solid var(--nb-highlight) !important;
    border-radius: 50px !important;
    font-weight: 700 !important;
    transition: all var(--nb-transition) !important;
}

.nb-btn-outline:hover {
    background: var(--nb-highlight) !important;
    color: var(--nb-text-dark) !important;
}


/* Tombol WhatsApp */
.nb-btn-wa {
    background: var(--nb-wa-green) !important;
    color: #ffffff !important;
    border-radius: 50px !important;
    font-weight: 600 !important;
    box-shadow: 0 10px 25px -5px rgba(37,211,102,0.4) !important;
    transition: all var(--nb-transition) !important;
    border: 2px solid transparent !important;
}

.nb-btn-wa:hover {
    background: var(--nb-wa-hover) !important;
    color: #ffffff !important;
    border-color: var(--nb-highlight) !important;
    transform: translateY(-3px) !important;
    box-shadow: 0 15px 30px -5px rgba(37,211,102,0.5) !important;
}


/* Nav CTA button */
.nb-btn-nav {
    background: var(--nb-highlight) !important;
    color: var(--nb-text-dark) !important;
    padding: 10px 24px !important;
    border-radius: 50px !important;
    font-weight: 700 !important;
    transition: all var(--nb-transition) !important;
    box-shadow: 0 4px 15px -3px rgba(251,191,36,0.5) !important;
}

.nb-btn-nav:hover {
    background: var(--nb-highlight-hover) !important;
    transform: translateY(-2px) !important;
}


/* ==========================================================================
   SECTIONS
   ========================================================================== */

/* Section background alternatif (biru gelap) */
.nb-section-alt,
.e-con.nb-section-alt {
    background-color: var(--nb-bg-alt) !important;
}


/* Section dark (gradient hitam) */
.nb-section-dark,
.e-con.nb-section-dark {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%) !important;
}


/* Section card background */
.nb-section-card,
.e-con.nb-section-card {
    background-color: var(--nb-bg-card) !important;
}


/* ==========================================================================
   CARDS & ICON BOX
   ========================================================================== */
.nb-card {
    background: rgba(23,37,84,0.5) !important;
    border: 1px solid var(--nb-border) !important;
    border-radius: var(--nb-radius) !important;
    padding: 32px 24px !important;
    transition: transform var(--nb-transition), background var(--nb-transition), border-color var(--nb-transition) !important;
}

.nb-card:hover {
    transform: translateY(-5px) !important;
    background: var(--nb-bg-card) !important;
    border-color: rgba(251,191,36,0.3) !important;
}


/* Card judul */
.nb-card h3,
.nb-card h4 {
    color: var(--nb-text-light) !important;
}


/* Card teks */
.nb-card p {
    color: var(--nb-text-muted) !important;
}


/* Card ikon */


/* ==========================================================================
   PRICING CARDS
   ========================================================================== */
.nb-price-card {
    background: var(--nb-bg-card) !important;
    border: 1px solid var(--nb-border) !important;
    border-radius: var(--nb-radius-lg) !important;
    transition: transform var(--nb-transition), box-shadow var(--nb-transition), border-color var(--nb-transition) !important;
    position: relative !important;
}

.nb-price-card:hover {
    transform: translateY(-10px) !important;
    box-shadow: var(--nb-shadow-card) !important;
    border-color: var(--nb-highlight) !important;
}

.nb-price-card.popular,
.nb-price-card.nb-popular {
    border: 2px solid var(--nb-highlight) !important;
    box-shadow: 0 20px 40px -10px rgba(251,191,36,0.2) !important;
    background: linear-gradient(145deg, var(--nb-bg-card), rgba(251,191,36,0.05)) !important;
}


/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */

/* Heading utama */
.nb-heading-light {
    color: var(--nb-text-light) !important;
}


/* Heading kuning/aksen */
.nb-heading-highlight,
.nb-text-highlight {
    color: var(--nb-highlight) !important;
}


/* Teks muted */
.nb-text-muted {
    color: var(--nb-text-muted) !important;
}


/* Badge / label */
.nb-badge {
    display: inline-block !important;
    background: var(--nb-highlight) !important;
    color: var(--nb-text-dark) !important;
    padding: 5px 15px !important;
    border-radius: 20px !important;
    font-size: 0.85rem !important;
    font-weight: 700 !important;
}


/* ==========================================================================
   FORMS & INPUT
   ========================================================================== */
.nb-form input,
.nb-form textarea,
.nb-form select {
    background: rgba(255,255,255,0.07) !important;
    border: 1px solid var(--nb-border) !important;
    border-radius: 8px !important;
    color: var(--nb-text-light) !important;
    padding: 12px 16px !important;
    transition: border-color var(--nb-transition) !important;
}

.nb-form input:focus,
.nb-form textarea:focus {
    border-color: var(--nb-highlight) !important;
    outline: none !important;
    box-shadow: 0 0 0 3px rgba(251,191,36,0.15) !important;
}

.nb-form input::placeholder,
.nb-form textarea::placeholder {
    color: rgba(255,255,255,0.4) !important;
}

.nb-form label {
    color: var(--nb-text-muted) !important;
    font-size: 0.9rem !important;
    margin-bottom: 6px !important;
}


/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
    background: var(--nb-bg-footer);
    color: var(--nb-text-muted);
    border-top: 1px solid var(--nb-border);
    font-size: 0.92rem;
}
.site-footer__inner {
    max-width: 1200px; margin: 0 auto; padding: 56px 24px 32px;
    display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px;
}
.site-footer__brand .site-title { font-size: 1.3rem; margin-bottom: 10px; }
.site-footer__brand p { max-width: 38ch; color: var(--nb-text-muted); }
.site-footer__heading {
    color: var(--nb-text-light); font-size: 0.8rem; font-weight: 700;
    letter-spacing: .08em; text-transform: uppercase; margin-bottom: 14px;
}
.footer-navigation ul { list-style: none; margin: 0; padding: 0; }
.footer-navigation li { margin-bottom: 8px; }
.footer-navigation a:hover { color: var(--nb-highlight); }
.site-footer__cta .nb-btn-wa {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 11px 22px; font-size: 0.9rem;
}
.site-footer__bottom {
    border-top: 1px solid var(--nb-border);
    max-width: 1200px; margin: 0 auto; padding: 20px 24px 28px;
    display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px;
    font-size: 0.85rem; color: rgba(203,213,225,.7);
}
@media (max-width: 800px) {
    .site-footer__inner { grid-template-columns: 1fr; gap: 28px; padding-top: 40px; }
}

/* ==========================================================================
   HALAMAN UMUM (page.php, index.php, archive.php, search.php, 404.php)
   ========================================================================== */
.nb-page-hero {
    background: linear-gradient(160deg, #0f172a 0%, #1e40af 100%);
    padding: 64px 24px;
    text-align: center;
}
.nb-page-hero__inner { max-width: 800px; margin: 0 auto; }
.nb-page-hero__title { font-size: clamp(1.8rem, 4.5vw, 2.75rem); color: var(--nb-text-light); margin: 0; }
.nb-page-hero__desc { color: var(--nb-text-muted); margin: 14px 0 0; }

.nb-page-body { background: #ffffff; color: #1e293b; padding: 56px 24px 72px; }
.nb-page-body__inner { max-width: 820px; margin: 0 auto; }
.nb-page-body--wide .nb-page-body__inner { max-width: 1200px; }

/* Halaman lebar penuh / hasil page builder: tanpa pembungkus */
.nb-fullwidth { background: transparent; color: inherit; }

/* Konten editor (artikel, halaman, blok Gutenberg) */
.entry-content { font-size: 1.05rem; line-height: 1.85; color: #1e293b; }
.entry-content > *:last-child { margin-bottom: 0; }
.entry-content h2 { font-size: 1.6rem; color: #0f172a; margin-top: 2rem; }
.entry-content h3 { font-size: 1.3rem; color: #0f172a; margin-top: 1.5rem; }
.entry-content h4 { font-size: 1.1rem; color: #0f172a; margin-top: 1.25rem; }
.entry-content a { color: #1e40af; border-bottom: 1px solid rgba(30,64,175,.3); }
.entry-content a:hover { color: var(--nb-highlight-hover); border-color: var(--nb-highlight); }
.entry-content blockquote {
    border-left: 4px solid var(--nb-highlight); background: #fffbf0;
    padding: 16px 24px; margin: 1.5rem 0; border-radius: 0 8px 8px 0; color: #1e293b;
}
.entry-content pre { background: #0f172a; color: #e2e8f0; padding: 16px 20px; border-radius: 8px; overflow-x: auto; }
.entry-content code { font-size: .92em; }
.entry-content :not(pre) > code { background: #f1f5f9; padding: 2px 6px; border-radius: 4px; }
.entry-content img { border-radius: 8px; }

/* Kartu daftar artikel */
.nb-post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.nb-post-card {
    background: #ffffff; border: 1px solid #e2e8f0; border-radius: var(--nb-radius);
    overflow: hidden; display: flex; flex-direction: column;
    transition: transform var(--nb-transition), box-shadow var(--nb-transition);
}
.nb-post-card:hover { transform: translateY(-4px); box-shadow: 0 16px 32px -12px rgba(15,23,42,.25); }
.nb-post-card__thumb { display: block; aspect-ratio: 16 / 9; background: #e2e8f0; overflow: hidden; }
.nb-post-card__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.nb-post-card__body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.nb-post-card__meta { font-size: .8rem; color: #64748b; margin-bottom: 8px; }
.nb-post-card__title { font-size: 1.1rem; margin-bottom: 8px; }
.nb-post-card__title a { color: #0f172a; }
.nb-post-card__title a:hover { color: #1e40af; }
.nb-post-card__excerpt { color: #475569; font-size: .92rem; margin: 0 0 14px; }
.nb-post-card__more { margin-top: auto; color: #1e40af; font-weight: 700; font-size: .88rem; }
@media (max-width: 960px) { .nb-post-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .nb-post-grid { grid-template-columns: 1fr; } }

/* Pagination umum */
.nb-page-body .nb-pagination,
.nb-pagination { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 40px; }
.nb-pagination .page-numbers {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 40px; height: 40px; padding: 0 14px;
    border: 1px solid #e2e8f0; border-radius: 999px;
    color: #1e293b; background: #fff; font-weight: 600; font-size: .9rem;
}
.nb-pagination .page-numbers:hover,
.nb-pagination .page-numbers.current { background: #1e40af; border-color: #1e40af; color: #fff; }

/* Form pencarian */
.search-form { display: flex; gap: 8px; max-width: 520px; margin: 0 auto; }
.search-form label { flex: 1; margin: 0; }
.search-form .search-field {
    width: 100%; padding: 12px 18px; border: 1.5px solid #e2e8f0; border-radius: 999px; color: #1e293b;
}
.search-form .search-field:focus { outline: none; border-color: #1e40af; box-shadow: 0 0 0 3px rgba(30,64,175,.12); }
.search-form .search-submit {
    background: var(--nb-highlight); color: var(--nb-text-dark); border: 0;
    border-radius: 999px; padding: 0 24px; font-weight: 700; cursor: pointer;
}
.search-form .search-submit:hover { background: var(--nb-highlight-hover); }

/* 404 */
.nb-404 { text-align: center; }
.nb-404__code { font-size: clamp(4rem, 14vw, 8rem); font-weight: 800; color: var(--nb-highlight); line-height: 1; margin: 0 0 8px; }
.nb-404 .nb-btn-primary { display: inline-block; padding: 12px 28px; margin-top: 18px; }

/* ==========================================================================
   CLASS INTI WORDPRESS (perataan, caption, galeri)
   ========================================================================== */
.alignleft  { float: left;  margin: .25em 1.5em 1em 0; }
.alignright { float: right; margin: .25em 0 1em 1.5em; }
.aligncenter { display: block; margin-left: auto; margin-right: auto; }
.alignwide  { max-width: 1100px; margin-left: auto; margin-right: auto; }
.alignfull  { width: 100vw; max-width: 100vw; margin-left: calc(50% - 50vw); }
.wp-caption { max-width: 100%; margin-bottom: 1.25em; }
.wp-caption-text, .wp-element-caption, figcaption { font-size: .85rem; color: #64748b; text-align: center; margin-top: 6px; }
.gallery { display: grid; gap: 12px; margin-bottom: 1.25em; }
.gallery-columns-2 { grid-template-columns: repeat(2, 1fr); }
.gallery-columns-3 { grid-template-columns: repeat(3, 1fr); }
.gallery-columns-4 { grid-template-columns: repeat(4, 1fr); }
.gallery-item { margin: 0; }
.sticky, .bypostauthor { display: block; }

/* Sidebar widget (area widget Sidebar Blog) */
.nb-widget { margin-bottom: 28px; }
.nb-widget-title { font-size: 1rem; margin-bottom: 12px; color: #0f172a; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}