/*
Theme Name: bk444 Open Guide
Theme URI: https://bk444.beer/
Author: bk444.beer editorial
Description: স্বাধীন বাংলা ব্র্যান্ড তথ্যগাইডের জন্য charcoal cinematic theme.
Version: 2.0.0
Text Domain: bk444-open-guide
*/
:root {
    --bg: #090a0c;
    --surface: #12151a;
    --section: #181c22;
    --info: #1d2228;
    --gold: #d8a64a;
    --gold-light: #f3ce7b;
    --blue: #7da7c7;
    --text: #f2f2ef;
    --muted: #b4b6b9;
    --line: #30343a;
    --warning: #dfa552;
    --danger: #d46f76;
    --wide: 1320px;
    --reading: 820px;
    --radius: 22px;
    --shadow: 0 28px 72px rgba(0,0,0,.38);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
    margin: 0;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "Noto Sans Bengali", "Nirmala UI", "Vrinda", system-ui, sans-serif;
    font-size: 18px;
    line-height: 1.74;
    text-rendering: optimizeLegibility;
}
body::before {
    position: fixed;
    inset: 0 0 auto;
    height: 440px;
    background: radial-gradient(ellipse at 50% 0, rgba(216,166,74,.13), transparent 68%);
    content: "";
    pointer-events: none;
    z-index: -1;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--gold-light); text-underline-offset: .2em; }
a:hover { color: #fff1c8; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--gold-light); outline-offset: 4px; }
p, ul, ol { margin: 0 0 1.35em; }
strong { color: #fff; }
h1, h2, h3 { margin: 0; line-height: 1.18; letter-spacing: -.025em; text-wrap: balance; }
h1 { font-size: clamp(2.35rem, 6.2vw, 5rem); }
h2 { font-size: clamp(1.85rem, 4.2vw, 3.4rem); margin-bottom: .6em; }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.55rem); margin: 1.8em 0 .55em; }
.site-shell { width: min(calc(100% - 48px), var(--wide)); margin-inline: auto; }
.reading-shell, .prose { width: min(calc(100% - 40px), var(--reading)); margin-inline: auto; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 1000; transform: translateY(-150%); padding: 10px 16px; background: #fff; color: #000; }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid rgba(255,255,255,.08); background: rgba(9,10,12,.9); backdrop-filter: blur(18px); }
.header-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.wordmark { display: inline-flex; min-height: 44px; align-items: center; color: var(--text); font-size: 1.6rem; font-weight: 800; letter-spacing: -.06em; text-decoration: none; }
.wordmark span { color: var(--gold); }
.nav-list { display: flex; align-items: center; gap: 8px; margin: 0; padding: 0; list-style: none; }
.nav-list a { display: flex; min-height: 44px; align-items: center; padding: 8px 14px; border-radius: 999px; color: var(--text); font-size: .88rem; text-decoration: none; }
.nav-list a:hover, .nav-list .current-menu-item a { background: var(--info); color: var(--gold-light); }
.menu-toggle { display: none; min-height: 44px; padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--text); font: inherit; }
.hero { padding: clamp(72px, 10vw, 128px) 0 44px; text-align: center; }
.hero-copy { width: min(calc(100% - 40px), 960px); margin-inline: auto; }
.eyebrow { margin-bottom: 1.1rem; color: var(--gold-light); font-size: .82rem; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.hero .lead { max-width: 860px; margin: 1.5rem auto 0; color: #d8d8d4; font-size: clamp(1.05rem, 2vw, 1.3rem); }
.hero-actions, .inline-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 11px 22px; border: 1px solid var(--gold); border-radius: 999px; background: var(--gold); color: #16130c; font-weight: 750; text-decoration: none; }
.button:hover { background: var(--gold-light); color: #16130c; }
.button.secondary { border-color: var(--line); background: transparent; color: var(--text); }
.button.secondary:hover { border-color: var(--gold); color: var(--gold-light); }
.figure-wide { width: min(calc(100% - 32px), var(--wide)); margin: 48px auto 0; }
.figure-wide img { width: 100%; border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); box-shadow: var(--shadow); }
figcaption { margin-top: 12px; color: var(--muted); font-size: .82rem; text-align: center; }
.chapter { padding: 104px 0; border-top: 1px solid rgba(255,255,255,.07); }
.chapter.alt { background: linear-gradient(180deg, rgba(24,28,34,.8), rgba(18,21,26,.55)); }
.chapter-intro { margin-bottom: 32px; }
.chapter-kicker { color: var(--blue); font-size: .82rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.disclosure, .notice, .risk-card { padding: 24px 26px; border: 1px solid var(--line); border-radius: 16px; background: var(--info); }
.disclosure { margin-top: 28px; border-left: 4px solid var(--gold); }
.notice { border-left: 4px solid var(--blue); }
.risk-card { border-color: rgba(223,165,82,.42); background: linear-gradient(135deg, rgba(223,165,82,.12), var(--info)); }
.risk-card h2 { font-size: clamp(1.65rem, 3.4vw, 2.6rem); }
.data-table { width: 100%; margin: 34px 0; border-collapse: collapse; border: 1px solid var(--line); background: var(--surface); }
.data-table th, .data-table td { padding: 16px 18px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.data-table th { background: #20252c; color: var(--gold-light); font-size: .92rem; }
.data-table td { color: #d8d8d5; }
.observation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 34px 0; }
.observation-card { padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.observation-card h3 { margin-top: 0; color: var(--gold-light); }
.route-steps { counter-reset: route; display: grid; gap: 16px; margin: 32px 0; }
.route-step { position: relative; padding: 22px 22px 22px 74px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.route-step::before { counter-increment: route; content: counter(route); position: absolute; top: 21px; left: 22px; display: grid; width: 36px; height: 36px; place-items: center; border-radius: 50%; background: var(--gold); color: #18130b; font-weight: 800; }
.image-pair { display: grid; width: min(calc(100% - 32px), var(--wide)); grid-template-columns: 1fr 1fr; gap: 22px; margin: 42px auto 0; }
.image-pair figure { margin: 0; }
.image-pair img { width: 100%; aspect-ratio: 3/2; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow); }
.source-name { color: var(--blue); font-weight: 700; }
.faq-list { display: grid; gap: 12px; margin-top: 30px; }
.faq-list details { border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.faq-list summary { min-height: 56px; padding: 15px 54px 15px 20px; cursor: pointer; color: var(--text); font-weight: 750; }
.faq-list details p { padding: 0 20px 20px; color: #d2d2cf; }
.core-page { min-height: 60vh; padding: clamp(64px, 9vw, 110px) 0; }
.core-page h1 { margin-bottom: 30px; font-size: clamp(2.35rem, 5vw, 4.4rem); }
.core-page h2 { margin: 1.9em 0 .6em; font-size: clamp(1.55rem, 3vw, 2.35rem); }
.core-page .intro { color: #deded9; font-size: 1.16rem; }
.core-page .inline-actions { justify-content: flex-start; padding-top: 10px; }
.site-footer { border-top: 1px solid var(--line); background: #08090b; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 70px; padding-block: 58px; }
.footer-grid p { max-width: 590px; color: var(--muted); }
.footer-grid nav h2 { margin-bottom: 12px; font-size: 1rem; color: var(--blue); }
.footer-grid ul { margin: 0; padding: 0; list-style: none; }
.footer-grid li + li { margin-top: 8px; }
.footer-grid a { min-height: 44px; display: inline-flex; align-items: center; }
.footer-email { color: #d7d7d2; overflow-wrap: anywhere; }
.copyright { padding-block: 20px 28px; border-top: 1px solid rgba(255,255,255,.07); color: #888b90; font-size: .8rem; }
@media (max-width: 860px) {
    .site-shell { width: min(calc(100% - 32px), var(--wide)); }
    .menu-toggle { display: inline-flex; }
    .primary-nav { position: absolute; top: calc(100% + 1px); right: 16px; left: 16px; display: block; padding: 12px; border: 1px solid var(--line); border-radius: 16px; background: #101216; box-shadow: var(--shadow); }
    .js .primary-nav { display: none; }
    .js .primary-nav.is-open { display: block; }
    .no-js .menu-toggle { display: none; }
    .nav-list { display: grid; }
    .nav-list a { padding: 10px 14px; }
    .chapter { padding: 70px 0; }
    .observation-grid { grid-template-columns: 1fr; }
    .image-pair { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 560px) {
    body { font-size: 16px; }
    .site-shell { width: calc(100% - 32px); }
    .reading-shell, .prose { width: calc(100% - 32px); }
    .hero { padding-top: 58px; }
    .hero-actions, .inline-actions { align-items: stretch; flex-direction: column; }
    .button { width: 100%; }
    .figure-wide, .image-pair { width: calc(100% - 24px); }
    .figure-wide img, .image-pair img { border-radius: 14px; }
    .data-table, .data-table tbody, .data-table tr, .data-table th, .data-table td { display: block; width: 100%; }
    .data-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
    .data-table tr { border-bottom: 1px solid var(--line); }
    .data-table td { border: 0; border-bottom: 1px solid rgba(255,255,255,.05); }
    .route-step { padding-left: 66px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}