:root {
    --bg: #07111f;
    --bg-2: #0c1a2e;
    --bg-card: #10233b;
    --ink: #e8eef7;
    --muted: #9bb0c9;
    --gold: #f0b429;
    --gold-2: #ffd98a;
    --fruit: #e23d6d;
    --sea: #2ee6c5;
    --line: rgba(240, 180, 41, 0.2);
    --line-subtle: rgba(255, 255, 255, 0.08);
    --radius: 18px;
    --radius-sm: 10px;
    --font: "Be Vietnam Pro", system-ui, -apple-system, sans-serif;
    --display: "Sora", "Be Vietnam Pro", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body.hbf-body {
    margin: 0;
    font-family: var(--font);
    background:
        radial-gradient(1200px 500px at 10% -10%, rgba(240, 180, 41, 0.16), transparent 50%),
        radial-gradient(900px 600px at 100% 0%, rgba(226, 61, 109, 0.14), transparent 45%),
        linear-gradient(180deg, var(--bg), #050b14 40%, var(--bg));
    color: var(--ink);
    line-height: 1.7;
}

a { color: var(--gold-2); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--gold); }
img, svg { max-width: 100%; display: block; }

.hbf-skip {
    position: absolute;
    left: -999px;
    top: 0;
}
.hbf-skip:focus { left: 12px; background: var(--gold); color: #111; padding: 8px 12px; z-index: 20; }
.hbf-wrap { width: min(1140px, calc(100% - 32px)); margin-inline: auto; }

/* ==========================================================================
   Header & Nav
   ========================================================================== */
.hbf-head {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
    background: rgba(7, 17, 31, 0.9);
    border-bottom: 1px solid var(--line);
}
.hbf-head__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 72px;
}
.hbf-logo { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.hbf-logo__mark svg { border-radius: 50%; box-shadow: 0 0 16px rgba(240, 180, 41, 0.35); }
.hbf-logo__text { display: flex; flex-direction: column; line-height: 1.15; }
.hbf-logo__text strong { font-family: var(--display); font-size: 1.05rem; color: #fff; letter-spacing: 0.02em; }
.hbf-logo__text small { color: var(--sea); font-size: 0.74rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }

.hbf-nav { display: flex; align-items: center; gap: 20px; }
.hbf-nav__list {
    display: flex;
    gap: 16px;
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}
.hbf-nav__list a { color: var(--ink); font-weight: 600; font-size: 0.92rem; }
.hbf-nav__list a:hover { color: var(--gold); }
.hbf-burger {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    background: var(--bg-card);
    border-radius: 12px;
    cursor: pointer;
}
.hbf-burger span {
    display: block;
    height: 2px;
    margin: 6px 10px;
    background: var(--gold);
}

/* ==========================================================================
   Buttons & Tags
   ========================================================================== */
.hbf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.95rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
    text-align: center;
}
.hbf-btn--gold {
    background: linear-gradient(180deg, var(--gold-2), var(--gold));
    color: #1a1203;
    box-shadow: 0 6px 20px rgba(240, 180, 41, 0.35);
}
.hbf-btn--gold:hover {
    color: #1a1203;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(240, 180, 41, 0.5);
}
.hbf-btn--ghost {
    border-color: var(--line);
    background: rgba(16, 35, 59, 0.6);
    color: var(--ink);
}
.hbf-btn--ghost:hover {
    border-color: var(--gold);
    color: var(--gold);
    background: var(--bg-card);
}
.hbf-btn--sea {
    background: linear-gradient(180deg, #5df3d8, var(--sea));
    color: #04261f;
}
.hbf-btn--sea:hover {
    color: #04261f;
    box-shadow: 0 6px 20px rgba(46, 230, 197, 0.4);
}
.hbf-btn--sm { padding: 8px 16px; font-size: 0.85rem; }
.hbf-btn--full { width: 100%; }

.hbf-tag {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 700;
}
.hbf-tag--green { background: rgba(46, 230, 197, 0.16); color: var(--sea); border: 1px solid rgba(46, 230, 197, 0.3); }
.hbf-tag--blue { background: rgba(56, 189, 248, 0.16); color: #38bdf8; border: 1px solid rgba(56, 189, 248, 0.3); }
.hbf-tag--gold { background: rgba(240, 180, 41, 0.16); color: var(--gold); border: 1px solid rgba(240, 180, 41, 0.3); }
.hbf-badge--yes { color: var(--sea); font-weight: 700; }
.hbf-badge--live {
    background: rgba(226, 61, 109, 0.2);
    border: 1px solid var(--fruit);
    color: #ff85a2;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 800;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hbf-hero { padding: 48px 0 32px; }
.hbf-hero__grid {
    display: grid;
    grid-template-columns: 1.35fr 0.85fr;
    gap: 36px;
    align-items: start;
}
.hbf-live-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(16, 35, 59, 0.85);
    border: 1px solid var(--line);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
}
.hbf-live-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--sea);
    box-shadow: 0 0 10px var(--sea);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(46, 230, 197, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(46, 230, 197, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(46, 230, 197, 0); }
}
.hbf-live-text { color: var(--sea); font-size: 0.82rem; font-weight: 700; }

.hbf-hero h1 {
    font-family: var(--display);
    font-size: clamp(2rem, 3.8vw, 3.3rem);
    line-height: 1.15;
    margin: 0 0 16px;
    color: #fff;
}
.hbf-lead { font-size: 1.12rem; color: var(--muted); margin: 0 0 24px; }
.hbf-hero__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }

.hbf-trust-badges {
    display: flex;
    gap: 24px;
    padding-top: 18px;
    border-top: 1px solid var(--line-subtle);
}
.hbf-trust-item strong { display: block; font-size: 1.3rem; font-family: var(--display); color: var(--gold); }
.hbf-trust-item span { color: var(--muted); font-size: 0.82rem; }

/* Hero Panel */
.hbf-hero__panel {
    background: linear-gradient(180deg, #132a45, var(--bg-card));
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.hbf-panel-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
}
.hbf-panel-title { margin: 0; font-family: var(--display); font-weight: 800; color: var(--gold); font-size: 1.05rem; }
.hbf-panel-list { display: flex; flex-direction: column; gap: 12px; }
.hbf-panel-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 14px;
    background: rgba(7, 17, 31, 0.6);
    border: 1px solid var(--line-subtle);
    border-radius: 14px;
    transition: all 0.2s ease;
}
.hbf-panel-link:hover {
    border-color: var(--gold);
    background: rgba(16, 35, 59, 0.9);
    transform: translateX(4px);
}
.hbf-panel-icon { font-size: 1.5rem; }
.hbf-panel-info { flex: 1; }
.hbf-panel-info strong { display: block; font-size: 0.92rem; color: #fff; }
.hbf-panel-info small { color: var(--muted); font-size: 0.78rem; }
.hbf-panel-arrow { color: var(--gold); font-weight: 700; font-size: 1.1rem; }

/* ==========================================================================
   Section Headers & Cards
   ========================================================================== */
.hbf-section-header { text-align: center; max-width: 680px; margin: 0 auto 28px; }
.hbf-section-header h2 { font-family: var(--display); font-size: 1.8rem; margin: 0 0 8px; color: #fff; }
.hbf-section-header p { color: var(--muted); margin: 0; }

.hbf-platforms, .hbf-latest { padding: 32px 0 48px; }
.hbf-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.hbf-cards--4 { grid-template-columns: repeat(4, 1fr); }
.hbf-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    position: relative;
    transition: all 0.25s ease;
}
.hbf-card:hover { border-color: var(--gold); transform: translateY(-3px); }
.hbf-card--link { color: var(--ink); display: flex; flex-direction: column; }
.hbf-card__tag {
    align-self: flex-start;
    background: rgba(240, 180, 41, 0.12);
    color: var(--gold);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 10px;
}
.hbf-card h2, .hbf-card h3 { font-family: var(--display); margin: 0 0 10px; font-size: 1.2rem; color: #fff; }
.hbf-card p { color: var(--muted); font-size: 0.92rem; margin: 0 0 14px; flex-grow: 1; }
.hbf-card__meta { color: var(--sea); font-size: 0.8rem; margin: 0 0 8px; font-weight: 600; }
.hbf-card__cta, .hbf-card__more { color: var(--gold-2); font-weight: 700; font-size: 0.88rem; }

/* ==========================================================================
   App Specification Box (Bandishare killer)
   ========================================================================== */
.hbf-spec-box {
    background: linear-gradient(180deg, #122842, var(--bg-card));
    border: 2px solid var(--gold);
    border-radius: 20px;
    padding: 24px;
    margin: 28px 0;
    box-shadow: 0 16px 48px rgba(240, 180, 41, 0.15);
}
.hbf-spec-box__header { margin-bottom: 18px; border-bottom: 1px solid var(--line); padding-bottom: 14px; }
.hbf-spec-box__badge {
    display: inline-block;
    background: var(--gold);
    color: #1a1203;
    font-weight: 800;
    font-size: 0.74rem;
    padding: 3px 10px;
    border-radius: 4px;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}
.hbf-spec-box__title { margin: 0; font-family: var(--display); font-size: 1.5rem; color: #fff; }
.hbf-spec-box__table { display: flex; flex-direction: column; gap: 8px; }
.hbf-spec-row {
    display: flex;
    justify-content: space-between;
    padding: 9px 12px;
    background: rgba(7, 17, 31, 0.6);
    border-radius: 8px;
    font-size: 0.92rem;
}
.hbf-spec-label { color: var(--muted); font-weight: 600; }
.hbf-spec-val { color: #fff; font-weight: 700; text-align: right; }
.hbf-spec-box__footer { margin-top: 20px; text-align: center; }
.hbf-spec-box__footer .hbf-btn { width: 100%; max-width: 480px; font-size: 1.05rem; }

/* ==========================================================================
   Table of Contents
   ========================================================================== */
.hbf-toc-wrap {
    background: rgba(16, 35, 59, 0.8);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 20px 24px;
    margin: 24px 0 32px;
}
.hbf-toc-title { margin: 0 0 12px; font-family: var(--display); font-weight: 800; color: var(--gold); font-size: 1.05rem; }
.hbf-toc-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.hbf-toc-list a { color: var(--ink); font-size: 0.93rem; font-weight: 600; display: inline-block; }
.hbf-toc-list a:hover { color: var(--gold); text-decoration: underline; }

/* ==========================================================================
   Feature Grid & Cards
   ========================================================================== */
.hbf-feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 24px 0; }
.hbf-feature-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px 20px;
}
.hbf-feature-card h3 { font-family: var(--display); font-size: 1.12rem; margin: 0 0 8px; color: var(--gold-2); }
.hbf-feature-card p { margin: 0; color: var(--muted); font-size: 0.9rem; }

/* ==========================================================================
   Download Grid (tai-hack-blox-fruit)
   ========================================================================== */
.hbf-download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 28px 0; }
.hbf-dl-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    flex-direction: column;
}
.hbf-dl-card h3 { font-family: var(--display); font-size: 1.25rem; margin: 12px 0 8px; color: #fff; }
.hbf-dl-card p { color: var(--muted); font-size: 0.9rem; margin: 0 0 14px; flex-grow: 1; }
.hbf-dl-features { list-style: none; padding: 0; margin: 0 0 20px; color: var(--sea); font-size: 0.85rem; font-weight: 600; }
.hbf-dl-features li { margin: 6px 0; }

/* ==========================================================================
   Tables (Hub comparison & codes)
   ========================================================================== */
.hbf-table-responsive { overflow-x: auto; margin: 24px 0; border-radius: 14px; border: 1px solid var(--line); }
.hbf-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.92rem; background: var(--bg-card); }
.hbf-table th { background: #132a45; color: var(--gold); padding: 14px 16px; font-family: var(--display); font-weight: 700; border-bottom: 1px solid var(--line); }
.hbf-table td { padding: 12px 16px; border-bottom: 1px solid var(--line-subtle); color: var(--ink); }
.hbf-table tr:hover td { background: rgba(240, 180, 41, 0.04); }

.hbf-code-badge {
    background: rgba(7, 17, 31, 0.9);
    border: 1px solid var(--gold);
    color: var(--gold-2);
    padding: 4px 10px;
    border-radius: 6px;
    font-family: monospace;
    font-size: 1rem;
    font-weight: 700;
}
.hbf-copy-btn {
    background: var(--gold);
    color: #1a1203;
    border: none;
    border-radius: 6px;
    padding: 6px 14px;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    transition: transform 0.15s ease, background 0.15s ease;
}
.hbf-copy-btn:hover { background: var(--gold-2); transform: scale(1.05); }

/* ==========================================================================
   HowTo Steps (Google HowTo schema friendly)
   ========================================================================== */
.hbf-steps { list-style: none; padding: 0; margin: 24px 0; display: flex; flex-direction: column; gap: 14px; }
.hbf-step-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: rgba(16, 35, 59, 0.6);
    border: 1px solid var(--line-subtle);
    border-radius: 14px;
    padding: 16px 20px;
}
.hbf-step-num {
    background: var(--gold);
    color: #1a1203;
    font-family: var(--display);
    font-weight: 800;
    font-size: 1.1rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.hbf-step-content strong { color: #fff; font-size: 1rem; }
.hbf-step-content span { color: var(--muted); font-size: 0.92rem; display: block; margin-top: 4px; }

/* ==========================================================================
   Troubleshooting Grid
   ========================================================================== */
.hbf-troubleshoot-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 24px 0; }
.hbf-ts-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-left: 4px solid var(--gold);
    border-radius: 12px;
    padding: 16px 20px;
}
.hbf-ts-card h4 { margin: 0 0 8px; font-family: var(--display); font-size: 1.05rem; color: #fff; }
.hbf-ts-card p { margin: 6px 0; font-size: 0.88rem; color: var(--muted); }
.hbf-ts-card strong { color: var(--gold-2); }

/* ==========================================================================
   Author Box & Sidebar
   ========================================================================== */
.hbf-author-box {
    display: flex;
    gap: 18px;
    align-items: center;
    background: rgba(16, 35, 59, 0.7);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 20px;
    margin: 40px 0 20px;
}
.hbf-author-avatar { font-size: 2.5rem; flex-shrink: 0; }
.hbf-author-info h4 { margin: 0 0 6px; font-family: var(--display); font-size: 1.1rem; color: #fff; }
.hbf-author-info p { margin: 0 0 8px; font-size: 0.88rem; color: var(--muted); }
.hbf-author-links { font-size: 0.82rem; color: var(--gold); font-weight: 600; }

.hbf-side-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
}
.hbf-side-btn-list { display: flex; flex-direction: column; gap: 8px; margin: 12px 0 16px; }
.hbf-side-btn {
    display: block;
    background: rgba(7, 17, 31, 0.7);
    border: 1px solid var(--line-subtle);
    padding: 10px 14px;
    border-radius: 10px;
    color: var(--ink);
    font-size: 0.88rem;
    font-weight: 600;
}
.hbf-side-btn:hover { border-color: var(--gold); color: var(--gold); }
.hbf-side-list { list-style: none; padding: 0; margin: 0; }
.hbf-side-list li { margin: 8px 0; }
.hbf-side-list a { color: var(--muted); font-size: 0.9rem; font-weight: 500; }
.hbf-side-list a:hover { color: var(--gold); }

/* Toast Notification */
.hbf-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--gold);
    color: #1a1203;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 800;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    z-index: 9999;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    pointer-events: none;
}
.hbf-toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Prose & Single Article
   ========================================================================== */
.hbf-prose { padding: 8px 0 48px; max-width: 820px; }
.hbf-prose h2 {
    font-family: var(--display);
    font-size: 1.55rem;
    margin: 2.2rem 0 0.8rem;
    padding-top: 0.6rem;
    border-top: 1px solid var(--line);
    color: #fff;
}
.hbf-prose h2:first-child { border-top: 0; }
.hbf-prose h3 { font-family: var(--display); font-size: 1.2rem; color: var(--gold-2); margin: 1.4rem 0 0.6rem; }
.hbf-prose ul, .hbf-prose ol { padding-left: 1.4rem; }
.hbf-prose li { margin: 0.4rem 0; }
.hbf-note {
    background: rgba(226, 61, 109, 0.12);
    border-left: 4px solid var(--fruit);
    padding: 14px 18px;
    border-radius: 0 12px 12px 0;
    margin: 0 0 1.6rem;
    font-size: 0.92rem;
}
.hbf-ilinks { display: grid; gap: 8px; padding-left: 1.1rem; }
.hbf-inline-cta { margin: 2rem 0; text-align: center; }

/* FAQ Accordion Items */
.hbf-faq { margin-top: 2.4rem; }
.hbf-faq-item {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 16px 20px;
    margin: 12px 0;
    background: var(--bg-2);
}
.hbf-faq-q { margin: 0 0 8px; font-size: 1.05rem; font-family: var(--display); color: #fff; }
.hbf-faq-a { color: var(--muted); font-size: 0.93rem; }
.hbf-faq-a p { margin: 0; }

.hbf-pagehead { padding: 28px 0 12px; }
.hbf-pagehead__tags { display: flex; gap: 8px; margin-bottom: 12px; }
.hbf-pagehead__meta-row { display: flex; gap: 18px; flex-wrap: wrap; color: var(--muted); font-size: 0.85rem; margin-top: 10px; }
.hbf-bc { display: flex; gap: 8px; padding-top: 20px; color: var(--muted); font-size: 0.85rem; }

.hbf-article--split {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    padding-bottom: 48px;
}
.hbf-side { position: sticky; top: 92px; align-self: start; }
.hbf-side__h { font-weight: 800; margin: 0 0 12px; font-family: var(--display); color: var(--gold); }

/* ==========================================================================
   Footer
   ========================================================================== */
.hbf-foot {
    border-top: 1px solid var(--line);
    background: #050b14;
    padding: 42px 0 24px;
}
.hbf-foot__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.hbf-foot__brand { font-family: var(--display); font-size: 1.3rem; margin: 0 0 10px; color: #fff; font-weight: 800; }
.hbf-foot__h { font-weight: 800; color: var(--gold); margin: 0 0 12px; font-family: var(--display); }
.hbf-foot__list { list-style: none; padding: 0; margin: 0; }
.hbf-foot__list li { margin: 8px 0; }
.hbf-foot__list a { color: var(--muted); font-size: 0.9rem; }
.hbf-foot__list a:hover { color: var(--gold); }
.hbf-foot__legal { margin-top: 32px; padding-top: 18px; border-top: 1px solid var(--line-subtle); color: #6d829c; font-size: 0.82rem; }

.hbf-404 { padding: 72px 0; text-align: center; }
.hbf-pager { padding: 12px 0 40px; }

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 960px) {
    .hbf-hero__grid, .hbf-article--split, .hbf-foot__grid, .hbf-cards, .hbf-cards--4, .hbf-download-grid, .hbf-feature-grid, .hbf-troubleshoot-grid {
        grid-template-columns: 1fr;
    }
    .hbf-burger { display: inline-block; }
    .hbf-nav {
        display: none;
        position: absolute;
        inset: 72px 16px auto;
        flex-direction: column;
        align-items: stretch;
        background: var(--bg-card);
        border: 1px solid var(--line);
        border-radius: 16px;
        padding: 20px;
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
    }
    .hbf-nav.is-open { display: flex; }
    .hbf-nav__list { flex-direction: column; }
    .hbf-trust-badges { flex-direction: column; gap: 12px; }
}