/* ==================== HN LANDING — Design tokens (handoff 1:1) ==================== */
.hn-root {
  --hn-bg: #F5F3EE;
  --hn-surface: #FFFFFF;
  --hn-ink: #111111;
  --hn-ink-soft: #44443F;
  --hn-body-ink: #2A2A26;
  --hn-muted: #66655F;
  --hn-accent: #00E05A;
  --hn-accent-ink: #0A4D26;
  --hn-accent-hover: #067A3A;
  --hn-danger: #C0392B;
  --hn-line: #111111;
  --hn-line-soft: #D8D5CC;
  --hn-paper-on-dark: #F5F3EE;
  --hn-riasec-r: #0074E4;
  --hn-riasec-i: #6D5AE6;
  --hn-riasec-a: #E0518F;
  --hn-riasec-s: #2BD67B;
  --hn-riasec-e: #F59F0A;
  --hn-riasec-c: #0FA8A0;
  --hn-font-display: 'Space Grotesk', 'Be Vietnam Pro', sans-serif;
  --hn-font-body: 'Be Vietnam Pro', system-ui, sans-serif;
  --hn-font-mono: 'JetBrains Mono', monospace;
  --hn-s2: 8px; --hn-s3: 12px; --hn-s4: 16px; --hn-s6: 24px;
  --hn-s8: 32px; --hn-s12: 48px; --hn-s16: 64px; --hn-s20: 80px;
  --hn-radius: 0;
  --hn-shadow-hard: 5px 5px 0 var(--hn-ink);
  --hn-container: 1200px;
  font-family: var(--hn-font-body);
  color: var(--hn-ink);
  background: var(--hn-bg);
  margin: 0;
  line-height: 1.5;
}
.hn-root * { box-sizing: border-box; }
body.hn-root, .page-template-page-blank-landingpage { overflow-x: clip; }
/* Content giờ nằm trong #wrapper #main của Flatsome — reset đệm + chống leak */
.page-template-page-blank-landingpage #main { padding: 0; background: var(--hn-bg, #F5F3EE); }
.hn-root button { margin: 0; }
.hn-btn, .hn-link { text-transform: none; }
.hn-container { max-width: var(--hn-container); margin: 0 auto; padding: 0 var(--hn-s6); }

/* ===== HAMBURGER MOBILE ===== JS tự chèn <button.hn-hamburger> vào header. 3 gạch vẽ bằng CSS (bg + ::before/::after) → không cần phần tử con, kses không đụng. */
.hn-hamburger {
  display: none; width: 42px; height: 40px; flex-shrink: 0; padding: 0; margin: 0; cursor: pointer;
  border: 1px solid var(--hn-ink); border-radius: 0; position: relative;
  background: linear-gradient(var(--hn-ink), var(--hn-ink)) no-repeat center / 18px 2px;
}
.hn-hamburger::before, .hn-hamburger::after { content: ""; position: absolute; left: 50%; width: 18px; height: 2px; background: var(--hn-ink); transform: translateX(-50%); transition: transform 220ms cubic-bezier(0.2,0.8,0.2,1), opacity 160ms; }
.hn-hamburger::before { top: 11px; }
.hn-hamburger::after { bottom: 11px; }
/* mở → chữ X */
.hn-header.is-open .hn-hamburger { background-size: 0 2px; }
.hn-header.is-open .hn-hamburger::before { top: 50%; transform: translate(-50%, -50%) rotate(45deg); }
.hn-header.is-open .hn-hamburger::after { bottom: auto; top: 50%; transform: translate(-50%, -50%) rotate(-45deg); }

@media (max-width: 820px) {
  .hn-hamburger { display: block; }
  .hn-header { position: relative; }  /* làm containing block cho dropdown (single header vẫn sticky do specificity cao hơn) */
  /* khu vực actions (con cuối header inner) → panel dropdown ẩn mặc định */
  .hn-header__inner > *:last-child {
    display: none !important;
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column !important; align-items: stretch !important; justify-content: flex-start !important;
    flex-wrap: nowrap !important; gap: 2px !important;
    background: var(--hn-bg); border-bottom: 1px solid var(--hn-line);
    padding: 8px var(--hn-s6, 24px) 16px; z-index: 40;
    box-shadow: 0 10px 18px rgba(0,0,0,0.07);
  }
  .hn-header.is-open .hn-header__inner > *:last-child { display: flex !important; }
  .hn-header__inner > *:last-child .hn-nav-link { padding: 12px 2px; border-bottom: 1px solid var(--hn-line-soft); white-space: nowrap; }
  .hn-header__inner > *:last-child .hn-lang { margin-top: 12px; }
  .hn-header__inner > *:last-child .hn-btn--small { align-self: flex-start; margin-top: 8px; }
  /* p rỗng do wpautop trong panel landing */
  .hn-header__inner > *:last-child p { margin: 0; }
}

/* ==================== TYPOGRAPHY ==================== */
.hn-display { font-family: var(--hn-font-display); font-weight: 700; letter-spacing: -0.03em; }
.hn-h1 { font-size: clamp(38px, 7vw, 88px); line-height: 1.04; margin: 0; }
.hn-h2 { font-size: clamp(26px, 3.8vw, 44px); line-height: 1.08; margin: 0; }
.hn-mono {
  font-family: var(--hn-font-mono); font-size: 12px;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted);
}
.hn-lead { font-size: clamp(16px, 1.8vw, 18px); line-height: 1.65; color: var(--hn-ink-soft); }
.hn-mark { background: var(--hn-accent); padding: 0 14px; display: inline-block; white-space: nowrap; }

/* ==================== BUTTONS ==================== */
.hn-btn {
  font-family: var(--hn-font-display); font-weight: 700; font-size: 18px;
  border: 1px solid var(--hn-ink); border-radius: var(--hn-radius);
  padding: 18px 42px; cursor: pointer;
  display: inline-block; text-decoration: none;
  transition: all 120ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.hn-btn--primary { background: var(--hn-accent); color: var(--hn-ink); }
.hn-btn--dark { background: var(--hn-ink); color: var(--hn-paper-on-dark); }
/* Nút nhỏ trên header: chiều cao cố định 40px, nội dung canh giữa — để cân với toggle VI/EN */
.hn-btn--small { font-size: 14px; height: 40px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; }
.hn-btn:hover { transform: translate(-3px, -3px); box-shadow: var(--hn-shadow-hard); color: inherit; }
.hn-btn--primary:hover { color: var(--hn-ink); }
.hn-btn--dark:hover { color: var(--hn-paper-on-dark); }
.hn-btn:active { transform: translate(0, 0); box-shadow: none; }
.hn-link {
  font-family: var(--hn-font-display); font-weight: 700; font-size: 17px;
  background: none; border: none; border-bottom: 2px solid var(--hn-accent);
  color: var(--hn-ink); cursor: pointer; padding: 6px 0;
  display: inline-flex; align-items: center; gap: 10px; transition: gap 120ms;
  text-decoration: none;
}
.hn-link:hover { gap: 16px; color: var(--hn-ink); }

/* ==================== HEADER ==================== */
.hn-header { border-bottom: 1px solid var(--hn-line); background: var(--hn-bg); }
/* wpautop bọc nút CTA header trong <p> có margin → triệt margin để 2 nút thẳng hàng */
.hn-header p { margin: 0; }
.hn-header p:empty { display: none; }
.hn-header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--hn-s4); padding: 14px var(--hn-s6); max-width: var(--hn-container); margin: 0 auto; }
.hn-logo { display: flex; align-items: center; gap: var(--hn-s3); }
/* Ô vuông xanh vẽ bằng CSS (::before) — KHÔNG dùng <span> rỗng (WordPress hay strip span rỗng khi lưu content) */
.hn-logo::before { content: ""; width: 16px; height: 16px; flex-shrink: 0; background: var(--hn-accent); border: 1px solid var(--hn-ink); }
.hn-logo__mark { display: none; } /* ẩn span gốc nếu còn — tránh 2 ô vuông */
.hn-logo__name { font-family: var(--hn-font-display); font-weight: 700; font-size: 19px; letter-spacing: -0.02em; }
.hn-logo__tag { font-family: var(--hn-font-mono); font-size: 10.5px; color: var(--hn-muted); letter-spacing: 0.06em; }
.hn-lang { display: flex; }
.hn-lang__btn {
  border: 1px solid var(--hn-ink); background: transparent; color: var(--hn-ink);
  font-family: var(--hn-font-mono); font-size: 12px; font-weight: 700;
  height: 40px; padding: 0 15px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; /* cùng 40px với nút CTA */
}
.hn-lang__btn + .hn-lang__btn { border-left: none; }
.hn-lang__btn.is-active { background: var(--hn-ink); color: var(--hn-paper-on-dark); }

/* ==================== HERO ==================== */
.hn-hero { border-bottom: 1px solid var(--hn-line); }
.hn-hero__meta {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  padding: 13px 0; border-bottom: 1px solid var(--hn-line-soft);
  font-family: var(--hn-font-mono); font-size: 11.5px;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted);
}
.hn-hero__title { padding: clamp(40px, 6vw, 72px) 0 clamp(28px, 4vw, 48px); max-width: 1060px; text-wrap: balance; }
.hn-hero__grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(32px, 4vw, 64px); align-items: start; padding-bottom: clamp(40px, 6vw, 72px);
}
.hn-hero__col { display: flex; flex-direction: column; gap: 26px; }
.hn-trust { display: flex; flex-direction: column; max-width: 480px; }
.hn-trust__row { display: flex; gap: 14px; align-items: baseline; border-top: 1px solid var(--hn-line); padding: 12px 2px; font-size: 14px; font-weight: 600; }
.hn-trust__row:last-child { border-bottom: 1px solid var(--hn-line); }
.hn-trust__idx { font-family: var(--hn-font-mono); font-size: 11px; color: var(--hn-muted); }

/* Panel dữ liệu (radar preview) */
.hn-panel { width: min(420px, 100%); border: 1px solid var(--hn-line); background: var(--hn-surface); margin-left: auto; }
.hn-panel__bar { display: flex; align-items: center; justify-content: space-between; padding: 12px 18px; border-bottom: 1px solid var(--hn-line); font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; }
.hn-panel__live { display: flex; align-items: center; gap: 7px; color: var(--hn-muted); }
.hn-panel__dot { width: 8px; height: 8px; background: var(--hn-accent); animation: hn-pulse 1.4s ease-in-out infinite; }
.hn-panel__body { padding: 18px 22px 8px; }
.hn-panel__code { font-family: var(--hn-font-display); font-size: 30px; font-weight: 700; letter-spacing: -0.02em; }
.hn-panel__legend { display: flex; justify-content: space-between; gap: 12px; padding: 10px 18px; border-top: 1px solid var(--hn-line-soft); font-family: var(--hn-font-mono); font-size: 11px; color: var(--hn-muted); }
.hn-panel__strip { background: var(--hn-ink); color: var(--hn-paper-on-dark); padding: 10px 18px; font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; }
@keyframes hn-pulse { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.35); opacity: 0.55; } }

/* ==================== STATS (nền đen) ==================== */
.hn-stats { background: var(--hn-ink); color: var(--hn-paper-on-dark); }
.hn-stats__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); max-width: var(--hn-container); margin: 0 auto; padding: 0 var(--hn-s6); }
.hn-stats__cell { padding: 26px 22px; border-left: 1px solid rgba(245,243,238,0.22); display: flex; flex-direction: column; gap: 6px; }
.hn-stats__num { font-family: var(--hn-font-display); font-size: clamp(28px, 3.4vw, 42px); font-weight: 700; letter-spacing: -0.02em; color: var(--hn-accent); line-height: 1; }
.hn-stats__label { font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: rgba(245,243,238,0.6); }

/* ==================== SECTION CHUNG ==================== */
.hn-section { padding: clamp(48px, 6vw, 80px) 0; }
.hn-section--bordered { border-top: 1px solid var(--hn-line); border-bottom: 1px solid var(--hn-line); background: var(--hn-surface); }
.hn-section--dark { background: var(--hn-ink); color: var(--hn-paper-on-dark); }
.hn-eyebrow { font-family: var(--hn-font-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); }
.hn-section--dark .hn-eyebrow { color: var(--hn-accent); }

/* ==================== PAIN (01) ==================== */
.hn-pain__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: clamp(32px, 5vw, 64px); align-items: center; }
.hn-stat-big { border-top: 1px solid var(--hn-line); padding-top: 18px; max-width: 440px; }
.hn-stat-big__num { font-family: var(--hn-font-display); font-size: clamp(48px, 6vw, 76px); font-weight: 700; letter-spacing: -0.03em; line-height: 1; }
.hn-stat-big__label { font-family: var(--hn-font-mono); font-size: 11.5px; letter-spacing: 0.05em; text-transform: uppercase; line-height: 1.6; color: var(--hn-muted); margin-top: 10px; max-width: 340px; }
.hn-quotes { display: flex; flex-direction: column; gap: 14px; }
.hn-quote { background: var(--hn-surface); border: 1px solid var(--hn-line); padding: 18px 22px; }
.hn-quote:nth-child(2) { margin-left: 7%; }
.hn-quote:nth-child(3) { margin-left: 14%; }
.hn-quote__text { font-size: 15.5px; line-height: 1.55; font-weight: 500; }
.hn-quote__role { font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); margin-top: 10px; }
.hn-quote--answer { background: var(--hn-ink); color: var(--hn-paper-on-dark); border: none; margin-top: 4px; }
.hn-quote--answer .hn-quote__role { color: var(--hn-accent); }

/* ==================== STEPS (02) ==================== */
.hn-steps__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--hn-s8); }
.hn-step { border-top: 1px solid var(--hn-line); padding-top: 20px; display: flex; flex-direction: column; gap: var(--hn-s3); }
.hn-step__num { font-family: var(--hn-font-display); font-size: 64px; font-weight: 700; line-height: 1; color: transparent; -webkit-text-stroke: 1.5px var(--hn-ink); }
.hn-step__num--accent { color: var(--hn-accent); }
.hn-step__title { font-family: var(--hn-font-display); font-size: 21px; font-weight: 700; }
.hn-step__desc { font-size: 14.5px; line-height: 1.65; color: var(--hn-ink-soft); }

/* ==================== CARDS ==================== */
.hn-card { background: var(--hn-surface); border: 1px solid var(--hn-line); padding: 26px; display: flex; flex-direction: column; gap: 14px; transition: all 120ms cubic-bezier(0.2,0.8,0.2,1); }
.hn-card:hover { transform: translate(-3px, -3px); box-shadow: var(--hn-shadow-hard); }
.hn-card__title { font-family: var(--hn-font-display); font-size: 21px; font-weight: 700; }
.hn-card__desc { font-size: 14.5px; line-height: 1.65; color: var(--hn-ink-soft); }
.hn-group { border: 1px solid rgba(245,243,238,0.28); padding: 22px; display: flex; flex-direction: column; gap: 12px; transition: all 120ms; }
.hn-group:hover { border-color: var(--hn-accent); background: rgba(0,224,90,0.06); }
.hn-group__chip { width: 34px; height: 34px; display: flex; align-items: center; justify-content: center; font-family: var(--hn-font-display); font-size: 17px; font-weight: 700; color: var(--hn-ink); }

/* ==================== FAQ ==================== */
.hn-faq { display: flex; flex-direction: column; }
.hn-faq details { border-top: 1px solid var(--hn-line); }
.hn-faq details:last-of-type { border-bottom: 1px solid var(--hn-line); }
.hn-faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 2px; font-family: var(--hn-font-display); font-size: 17px; font-weight: 700; cursor: pointer; list-style: none; }
.hn-faq summary::-webkit-details-marker { display: none; }
.hn-faq summary::after { content: "+"; font-family: var(--hn-font-mono); font-size: 22px; transition: transform 200ms cubic-bezier(0.2,0.8,0.2,1); }
.hn-faq details[open] summary::after { transform: rotate(45deg); }
.hn-faq__a { padding: 0 2px 20px; font-size: 14.5px; line-height: 1.7; color: var(--hn-ink-soft); max-width: 520px; }

/* ==================== CTA BAND / FOOTER ==================== */
.hn-cta { background: var(--hn-accent); border-top: 1px solid var(--hn-line); }
.hn-cta__title { font-size: clamp(36px, 6.5vw, 84px); line-height: 1.02; max-width: 900px; text-wrap: balance; }
.hn-cta__sub { color: var(--hn-accent-ink); max-width: 520px; }
.hn-footer { background: var(--hn-ink); color: rgba(245,243,238,0.6); }
.hn-footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--hn-s4); align-items: baseline; padding: var(--hn-s8) var(--hn-s6); max-width: var(--hn-container); margin: 0 auto; font-family: var(--hn-font-mono); font-size: 11px; line-height: 1.7; }

/* ==================== ABOUT PAGE (trang giới thiệu) ==================== */
.hn-nav-link { border: none; background: none; cursor: pointer; color: var(--hn-ink); font-family: var(--hn-font-mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; padding: 7px 2px; border-bottom: 2px solid transparent; transition: border-color 120ms; text-decoration: none; }
.hn-nav-link:hover, .hn-nav-link.is-active { border-bottom-color: var(--hn-accent); color: var(--hn-ink); }
.hn-btn--large { font-size: 18px; padding: 18px 46px; }
.hn-btn--dark:hover { box-shadow: 5px 5px 0 rgba(17,17,17,0.35); }

.hn-about-hero { border-bottom: 1px solid var(--hn-line); }
.hn-about-hero__meta { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding: 13px 0; border-bottom: 1px solid var(--hn-line-soft); font-family: var(--hn-font-mono); font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); }
.hn-about-hero__title { margin: 0; padding: clamp(40px, 6vw, 72px) 0 clamp(20px, 3vw, 32px); font-size: clamp(34px, 5.5vw, 72px); line-height: 1.05; max-width: 1000px; text-wrap: balance; }
.hn-about-hero__lead { margin: 0; padding-bottom: clamp(40px, 6vw, 64px); font-size: clamp(16px, 1.8vw, 18px); line-height: 1.65; color: var(--hn-ink-soft); max-width: 620px; }

.hn-mission { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: clamp(32px, 5vw, 64px); align-items: start; }
.hn-mission__body { display: flex; flex-direction: column; gap: 18px; border-top: 1px solid var(--hn-line); padding-top: 22px; }
.hn-mission__body p { margin: 0; font-size: 16px; line-height: 1.7; color: var(--hn-ink-soft); }

.hn-method { border-top: 1px solid var(--hn-line); padding-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.hn-method__num { font-family: var(--hn-font-display); font-size: 64px; font-weight: 700; line-height: 1; color: transparent; -webkit-text-stroke: 1.5px var(--hn-ink); }
.hn-method__num--accent { color: var(--hn-accent); -webkit-text-stroke: 0; }
.hn-method__title { font-family: var(--hn-font-display); font-size: 21px; font-weight: 700; letter-spacing: -0.01em; }
.hn-method__desc { font-size: 14.5px; line-height: 1.65; color: var(--hn-ink-soft); }

/* Footer ô vuông xanh vẽ bằng CSS (không span rỗng) */
.hn-footer__brand { display: flex; align-items: center; gap: 10px; }
.hn-footer__brand::before { content: ""; width: 12px; height: 12px; background: var(--hn-accent); display: inline-block; flex-shrink: 0; }
/* wpautop có thể bọc [hn_about] trong <p> — triệt để an toàn */
.hn-about + p:empty, p:empty { margin: 0; }

/* ==================== CONTACT PAGE (trang liên hệ) ==================== */
.hn-contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: clamp(32px, 5vw, 64px); align-items: start; padding: clamp(48px, 6vw, 80px) 0; }
.hn-channels { display: flex; flex-direction: column; }
.hn-channels__row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px; border-top: 1px solid var(--hn-line); padding: 16px 2px; align-items: baseline; }
.hn-channels__row:last-child { border-bottom: 1px solid var(--hn-line); }
.hn-channels__label { font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); }
.hn-channels__value { font-family: var(--hn-font-display); font-size: 18px; font-weight: 700; color: var(--hn-ink); }
.hn-school { background: var(--hn-ink); color: var(--hn-paper-on-dark); padding: 24px; }
.hn-school__title { font-family: var(--hn-font-display); font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.hn-school__desc { font-size: 14.5px; line-height: 1.65; color: rgba(245,243,238,0.75); }

.hn-form { background: var(--hn-surface); border: 1px solid var(--hn-line); padding: clamp(22px, 3vw, 32px); display: flex; flex-direction: column; gap: 18px; }
.hn-form label { display: block; font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); margin-bottom: 7px; }
.hn-form input[type="text"], .hn-form input[type="email"], .hn-form select, .hn-form textarea { border: 1px solid var(--hn-line); border-radius: 0; background: var(--hn-bg); padding: 13px 14px; font-family: var(--hn-font-body); font-size: 15px; color: var(--hn-ink); outline: none; width: 100%; transition: all 120ms cubic-bezier(0.2,0.8,0.2,1); }
.hn-form select { cursor: pointer; -webkit-appearance: none; appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--hn-ink) 50%), linear-gradient(135deg, var(--hn-ink) 50%, transparent 50%); background-position: calc(100% - 18px) center, calc(100% - 13px) center; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat; padding-right: 34px; }
.hn-form textarea { resize: vertical; min-height: 120px; }
.hn-form input:focus, .hn-form select:focus, .hn-form textarea:focus { background: var(--hn-surface); box-shadow: 3px 3px 0 var(--hn-accent); }
.hn-form input[type="submit"] { align-self: flex-start; border: 1px solid var(--hn-line); cursor: pointer; background: var(--hn-accent); color: var(--hn-ink); font-family: var(--hn-font-display); font-size: 16px; font-weight: 700; padding: 15px 36px; border-radius: 0; transition: all 120ms cubic-bezier(0.2,0.8,0.2,1); width: auto; }
.hn-form input[type="submit"]:hover { transform: translate(-3px, -3px); box-shadow: var(--hn-shadow-hard); }
.hn-form input[type="submit"]:active { transform: translate(0, 0); box-shadow: none; }
.hn-form input[type="submit"]:disabled { opacity: .55; cursor: default; transform: none; box-shadow: none; }
.hn-form__error { font-family: var(--hn-font-mono); font-size: 12px; color: var(--hn-danger); letter-spacing: 0.03em; margin-top: 5px; display: block; }
.hn-form-success { background: var(--hn-accent); border: 1px solid var(--hn-line); padding: clamp(28px, 4vw, 40px); }
.hn-form-success__title { font-family: var(--hn-font-display); font-size: clamp(22px, 3vw, 30px); font-weight: 700; letter-spacing: -0.02em; color: var(--hn-ink); }

/* ==================== BLOG PAGE (chuyên mục blog) ==================== */
.hn-blog-hero { border-bottom: 1px solid var(--hn-line); }
.hn-blog-hero__meta { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding: 13px 0; border-bottom: 1px solid var(--hn-line-soft); font-family: var(--hn-font-mono); font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); }
.hn-blog-hero__title { margin: 0; padding: clamp(40px, 6vw, 72px) 0 clamp(20px, 3vw, 32px); font-size: clamp(34px, 5.5vw, 72px); line-height: 1.05; max-width: 1000px; text-wrap: balance; }
.hn-blog-hero__lead { margin: 0; padding-bottom: clamp(40px, 6vw, 64px); font-size: clamp(16px, 1.8vw, 18px); line-height: 1.65; color: var(--hn-ink-soft); max-width: 620px; }
.hn-featured { border-bottom: 1px solid var(--hn-line); background: var(--hn-surface); }
.hn-featured__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: clamp(28px, 4vw, 56px); align-items: center; padding: clamp(40px, 5vw, 64px) 0; }
.hn-featured__img { border: 1px solid var(--hn-line); height: clamp(260px, 32vw, 380px); overflow: hidden; }
.hn-featured__img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hn-featured__meta { display: flex; flex-wrap: wrap; gap: 10px 20px; font-family: var(--hn-font-mono); font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); align-items: center; }
.hn-featured__tag { background: var(--hn-accent); color: var(--hn-ink); border: 1px solid var(--hn-line); padding: 3px 10px; font-weight: 700; }
.hn-featured__title { margin: 0; font-size: clamp(26px, 3.6vw, 42px); line-height: 1.1; text-wrap: pretty; }
.hn-featured__excerpt { margin: 0; font-size: 16px; line-height: 1.65; color: var(--hn-ink-soft); max-width: 520px; }
.hn-readmore { align-self: flex-start; display: inline-flex; align-items: center; gap: 10px; border: none; background: none; cursor: pointer; padding: 6px 0; color: var(--hn-ink); font-family: var(--hn-font-display); font-size: 17px; font-weight: 700; border-bottom: 2px solid var(--hn-accent); transition: gap 120ms; text-decoration: none; }
.hn-readmore:hover { gap: 16px; }
.hn-posts { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: clamp(24px, 3vw, 40px) 32px; }
.hn-post { border-top: 1px solid var(--hn-line); padding-top: 18px; display: flex; flex-direction: column; gap: 12px; cursor: pointer; transition: transform 120ms cubic-bezier(0.2,0.8,0.2,1); }
.hn-post:hover { transform: translate(-3px, -3px); }
.hn-post__meta { display: flex; justify-content: space-between; gap: 12px; font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); }
.hn-post__cat { font-weight: 700; color: var(--hn-accent-hover); }
.hn-post__title { margin: 0; font-family: var(--hn-font-display); font-size: 21px; font-weight: 700; letter-spacing: -0.02em; line-height: 1.25; text-wrap: pretty; }
.hn-post__excerpt { margin: 0; font-size: 14.5px; line-height: 1.65; color: var(--hn-ink-soft); flex: 1; }
.hn-post__foot { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.hn-post__link { font-family: var(--hn-font-display); font-size: 14px; font-weight: 700; color: var(--hn-ink); border-bottom: 2px solid var(--hn-accent); padding-bottom: 1px; text-decoration: none; }
.hn-post__read { font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--hn-muted); white-space: nowrap; }
.hn-pagination { display: flex; gap: 0; justify-content: center; flex-wrap: wrap; margin-top: clamp(40px, 5vw, 56px); }
.hn-pagination a, .hn-pagination span { border: 1px solid var(--hn-line); border-left: none; padding: 10px 16px; font-family: var(--hn-font-mono); font-size: 13px; font-weight: 700; color: var(--hn-ink); text-decoration: none; transition: all 120ms; }
.hn-pagination a:first-child, .hn-pagination span:first-child { border-left: 1px solid var(--hn-line); }
.hn-pagination .current { background: var(--hn-ink); color: var(--hn-paper-on-dark); }
.hn-pagination a:hover { background: var(--hn-accent); }

/* ==================== SINGLE POST (bài viết chi tiết) ==================== */
.hn-single { padding-bottom: 8px; }
.hn-article-container { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.hn-single .hn-header { position: sticky; top: 0; z-index: 20; }
.hn-post-meta { display: flex; flex-wrap: wrap; gap: 10px 20px; padding: clamp(28px, 4vw, 48px) 0 0; font-family: var(--hn-font-mono); font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); }
.hn-post-meta__cat { font-weight: 700; color: var(--hn-accent-hover); }
.hn-post-title { margin: 0; padding: 18px 0 20px; font-size: clamp(30px, 4.8vw, 54px); line-height: 1.08; text-wrap: balance; }
.hn-post-lead { margin: 0 0 8px; font-size: clamp(17px, 2vw, 19px); line-height: 1.65; color: var(--hn-ink-soft); font-weight: 500; }
.hn-post-byline { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px; border-top: 1px solid var(--hn-line); border-bottom: 1px solid var(--hn-line-soft); padding: 12px 2px; margin: 24px 0 8px; font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--hn-muted); }
.hn-post-body { font-size: 16.5px; line-height: 1.8; color: var(--hn-body-ink); padding-top: 20px; }
.hn-post-body p { margin: 0 0 22px; }
.hn-post-body h2 { margin: 34px 0 22px; font-family: var(--hn-font-display); font-size: clamp(21px, 2.8vw, 28px); font-weight: 700; letter-spacing: -0.02em; color: var(--hn-ink); }
.hn-post-body h3 { margin: 28px 0 16px; font-family: var(--hn-font-display); font-size: clamp(18px, 2.2vw, 22px); font-weight: 700; letter-spacing: -0.01em; color: var(--hn-ink); }
.hn-post-body ul, .hn-post-body ol { margin: 0 0 22px; padding-left: 22px; }
.hn-post-body li { margin-bottom: 8px; }
.hn-post-body img { max-width: 100%; height: auto; border: 1px solid var(--hn-line); margin: 0 0 22px; }
.hn-post-body blockquote { margin: 8px 0 22px; border-left: 4px solid var(--hn-accent); border-top: 1px solid var(--hn-line); border-right: 1px solid var(--hn-line); border-bottom: 1px solid var(--hn-line); background: var(--hn-surface); padding: 22px 26px; font-family: var(--hn-font-display); font-size: clamp(19px, 2.4vw, 24px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.4; color: var(--hn-ink); }
.hn-post-body blockquote p { margin: 0; }
.hn-post-body a { color: var(--hn-ink); text-decoration: underline; text-decoration-color: var(--hn-accent); text-decoration-thickness: 2px; text-underline-offset: 3px; }
.hn-post-body a:hover { color: var(--hn-accent-hover); }
.hn-checklist { display: flex; flex-direction: column; margin: 0 0 22px; }
.hn-checklist__row { display: flex; gap: 14px; border-top: 1px solid var(--hn-line); padding: 14px 2px; align-items: baseline; }
.hn-checklist__row:last-child { border-bottom: 1px solid var(--hn-line); }
.hn-checklist__num { font-family: var(--hn-font-mono); font-size: 12px; font-weight: 700; color: var(--hn-accent-hover); }
.hn-checklist__text { font-size: 15.5px; line-height: 1.6; }

.hn-cta-mid { background: var(--hn-ink); color: var(--hn-paper-on-dark); padding: clamp(24px, 3.5vw, 36px); margin: 12px 0 22px; display: flex; flex-direction: column; gap: 12px; }
.hn-cta-mid__eyebrow { font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-accent); }
.hn-cta-mid__title { font-family: var(--hn-font-display); font-size: clamp(21px, 3vw, 28px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; }
.hn-cta-mid__desc { font-size: 14.5px; line-height: 1.65; color: rgba(245,243,238,0.75); max-width: 480px; }
.hn-cta-mid__btn { align-self: flex-start; margin-top: 6px; border: 1px solid var(--hn-accent); cursor: pointer; background: var(--hn-accent); color: var(--hn-ink); font-family: var(--hn-font-display); font-size: 16px; font-weight: 700; padding: 14px 32px; transition: all 120ms cubic-bezier(0.2,0.8,0.2,1); text-decoration: none; display: inline-block; }
.hn-cta-mid__btn:hover { transform: translate(-3px, -3px); box-shadow: 5px 5px 0 rgba(0,224,90,0.4); }

.hn-cta-end { background: var(--hn-accent); border: 1px solid var(--hn-line); padding: clamp(26px, 4vw, 40px); margin-top: 36px; display: flex; flex-direction: column; gap: 14px; }
.hn-cta-end__title { font-family: var(--hn-font-display); font-size: clamp(24px, 3.5vw, 36px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; color: var(--hn-ink); text-wrap: balance; }
.hn-cta-end__desc { font-size: 15px; line-height: 1.65; color: var(--hn-accent-ink); max-width: 480px; }
.hn-cta-end__note { font-family: var(--hn-font-mono); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--hn-accent-ink); }
/* CTA đặt tay GIỮA thân bài: nút không được dính style link bài viết (đen + gạch chân) */
.hn-post-body .hn-cta-mid a, .hn-post-body .hn-cta-end a { text-decoration: none; }
.hn-post-body .hn-cta-end a.hn-btn--dark, .hn-post-body .hn-cta-end a.hn-btn--dark:hover { color: var(--hn-paper-on-dark); }
.hn-post-body .hn-cta-mid a.hn-cta-mid__btn, .hn-post-body .hn-cta-mid a.hn-cta-mid__btn:hover { color: var(--hn-ink); }

.hn-related { margin-top: clamp(40px, 5vw, 56px); }
.hn-related__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 24px; }
.hn-related__item { border-top: 1px solid var(--hn-line); padding-top: 14px; display: flex; flex-direction: column; gap: 8px; cursor: pointer; transition: transform 120ms cubic-bezier(0.2,0.8,0.2,1); text-decoration: none; color: inherit; }
.hn-related__item:hover { transform: translate(-2px, -2px); }
.hn-related__meta { display: flex; justify-content: space-between; gap: 10px; font-family: var(--hn-font-mono); font-size: 10.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hn-muted); }
.hn-related__cat { font-weight: 700; color: var(--hn-accent-hover); }
.hn-related__title { font-family: var(--hn-font-display); font-size: 16.5px; font-weight: 700; letter-spacing: -0.01em; line-height: 1.3; color: var(--hn-ink); text-wrap: pretty; }

.hn-sticky-bar { position: fixed; bottom: 0; left: 0; right: 0; z-index: 30; background: var(--hn-ink); border-top: 1px solid var(--hn-line); transform: translateY(100%); transition: transform 280ms cubic-bezier(0.2,0.8,0.2,1); }
.hn-sticky-bar.is-visible { transform: translateY(0); }
.hn-sticky-bar__inner { max-width: 760px; margin: 0 auto; padding: 10px 20px; display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.hn-sticky-bar__text { font-family: var(--hn-font-mono); font-size: 11.5px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--hn-paper-on-dark); display: flex; align-items: center; gap: 9px; }
.hn-sticky-bar__dot { width: 8px; height: 8px; background: var(--hn-accent); animation: hn-pulse 1.4s ease-in-out infinite; flex-shrink: 0; }
.hn-sticky-bar__btn { border: 1px solid var(--hn-accent); cursor: pointer; background: var(--hn-accent); color: var(--hn-ink); font-family: var(--hn-font-display); font-size: 14px; font-weight: 700; padding: 9px 20px; white-space: nowrap; transition: all 120ms cubic-bezier(0.2,0.8,0.2,1); text-decoration: none; display: inline-block; }
.hn-sticky-bar__btn:hover { transform: translate(-2px, -2px); box-shadow: 3px 3px 0 rgba(0,224,90,0.4); }
@media (max-width: 480px) { .hn-sticky-bar__text { font-size: 10.5px; } .hn-sticky-bar__btn { padding: 9px 14px; } }