/* =========================================================
   LANDING.CSS – Đợt 4d: Trang chủ (index.html)
   One-page cuộn dọc, tông VÀNG PASTEL, dùng biến của style.css.
   Toàn bộ class prefix lp-. Không đụng tới .article / .rd-*.
   ========================================================= */

body.landing { font-family: var(--font-sans); color: var(--ink); scroll-behavior: smooth; }
body.landing { background: radial-gradient(1200px 600px at 80% -10%, var(--brand-soft) 0%, transparent 60%), linear-gradient(135deg, var(--bg-1) 0%, var(--bg-2) 60%); }
.landing img { max-width: 100%; display: block; }
.lp-container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 22px; }

/* ---------- NAV ---------- */
.lp-nav { position: sticky; top: 0; z-index: 50; backdrop-filter: saturate(1.4) blur(8px); background: rgba(255, 253, 246, .82); border-bottom: 1px solid var(--border); }
.lp-nav__in { display: flex; align-items: center; gap: 16px; height: 60px; padding-right: 54px; } /* chừa góc phải cho nút Tài khoản nổi của store.js */
.lp-brand { display: flex; align-items: center; gap: 9px; font-weight: 800; color: var(--brand); font-size: 16px; text-decoration: none; white-space: nowrap; }
.lp-brand__ic { font-size: 22px; }
.lp-nav__links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.lp-nav__links a { text-decoration: none; color: var(--ink); font-size: 14px; font-weight: 600; padding: 8px 12px; border-radius: 9px; }
.lp-nav__links a:hover { background: var(--brand-soft); color: var(--brand); }
.lp-nav__links a.lp-navcta { background: var(--brand); color: #fff; }
.lp-nav__links a.lp-navcta:hover { background: var(--brand-2); color: #fff; }
.lp-burger { display: none; margin-left: auto; width: 42px; height: 42px; border: 1px solid var(--border); background: var(--paper); border-radius: 10px; cursor: pointer; font-size: 20px; color: var(--brand); }

/* ---------- nút chung ---------- */
.lp-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 22px; border-radius: 12px; font-family: var(--font-sans); font-size: 15px; font-weight: 700; text-decoration: none; cursor: pointer; border: 1px solid transparent; transition: transform .12s, background .15s, box-shadow .15s; }
.lp-btn--primary { background: var(--brand); color: #fff; box-shadow: var(--shadow-sm); }
.lp-btn--primary:hover { background: var(--brand-2); transform: translateY(-2px); box-shadow: var(--shadow); }
.lp-btn--ghost { background: var(--paper); color: var(--brand); border-color: var(--border); }
.lp-btn--ghost:hover { background: var(--brand-soft); transform: translateY(-2px); }
.lp-btn--lg { padding: 15px 30px; font-size: 16px; }

/* ---------- HERO ---------- */
.lp-hero { padding: 56px 0 40px; }
.lp-hero__in { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; }
.lp-eyebrow { display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: 1.2px; text-transform: uppercase; color: var(--brand-2); background: var(--brand-soft); border: 1px solid var(--border); padding: 5px 12px; border-radius: 999px; margin-bottom: 16px; }
.lp-hero h1 { font-family: var(--font-serif); font-size: clamp(30px, 5vw, 50px); line-height: 1.12; margin: 0 0 16px; color: var(--h1); }
.lp-hero h1 span { color: var(--accent); }
.lp-hero__sub { font-size: 17px; line-height: 1.65; color: var(--ink-soft); max-width: 540px; margin: 0 0 26px; }
.lp-hero__cta { display: flex; flex-wrap: wrap; gap: 12px; }
.lp-hero__meta { margin-top: 20px; font-size: 13.5px; color: var(--ink-soft); }
.lp-hero__meta b { color: var(--brand-2); }
/* ảnh bìa */
.lp-cover { position: relative; justify-self: center; }
.lp-cover img { width: min(300px, 72vw); border-radius: 12px; box-shadow: var(--shadow); transform: rotate(2.4deg); transition: transform .35s; }
.lp-cover img:hover { transform: rotate(0deg) scale(1.02); }
.lp-cover::after { content: ""; position: absolute; inset: auto -6% -7% 8%; height: 86%; border-radius: 16px; background: linear-gradient(135deg, var(--brand-soft), transparent); z-index: -1; transform: rotate(2.4deg); }

/* ---------- SECTION chung ---------- */
.lp-sect { padding: 54px 0; }
.lp-sect--tint { background: linear-gradient(180deg, rgba(213, 150, 42, .10), transparent); }
.lp-sect__head { text-align: center; max-width: 680px; margin: 0 auto 34px; }
.lp-sect__head h2 { font-family: var(--font-serif); font-size: clamp(24px, 3.6vw, 34px); color: var(--h1); margin: 0 0 10px; }
.lp-sect__head p { font-size: 16px; line-height: 1.6; color: var(--ink-soft); margin: 0; }

/* ---------- grid thẻ chung ---------- */
.lp-grid { display: grid; gap: 16px; }
.lp-grid--3 { grid-template-columns: repeat(3, 1fr); }
.lp-grid--4 { grid-template-columns: repeat(4, 1fr); }
.lp-grid--2 { grid-template-columns: repeat(2, 1fr); }
.lp-card { background: var(--paper); border: 1px solid var(--border); border-radius: 16px; padding: 22px; box-shadow: var(--shadow-sm); transition: transform .15s, box-shadow .15s; }
.lp-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.lp-card__ic { font-size: 30px; line-height: 1; margin-bottom: 12px; }
.lp-card h3 { font-size: 17px; margin: 0 0 7px; color: var(--brand-2); }
.lp-card p { font-size: 14px; line-height: 1.55; color: var(--ink-soft); margin: 0; }

/* ---------- 8 CASE ---------- */
.lp-cases__grid { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.lp-case { display: flex; align-items: center; gap: 10px; background: var(--paper); border: 1px solid var(--border); border-radius: 999px; padding: 9px 16px 9px 12px; box-shadow: var(--shadow-sm); transition: transform .12s, background .12s; }
.lp-case:hover { transform: translateY(-3px); background: var(--brand-soft); }
.lp-case__ic { font-size: 22px; }
.lp-case__name { font-weight: 700; font-size: 14px; color: var(--ink); }
.lp-case__model { font-size: 11.5px; color: var(--ink-soft); }

/* ---------- LỘ TRÌNH ---------- */
.lp-plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: start; }
.lp-plan { position: relative; background: var(--paper); border: 1px solid var(--border); border-radius: 18px; padding: 24px 22px; box-shadow: var(--shadow-sm); }
.lp-plan.is-featured { border-color: var(--brand); box-shadow: var(--shadow); background: linear-gradient(170deg, var(--brand-soft), var(--paper) 55%); }
.lp-plan__badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--brand); color: #fff; font-size: 11.5px; font-weight: 800; padding: 4px 12px; border-radius: 999px; white-space: nowrap; }
.lp-plan__n { font-family: var(--font-serif); font-size: 30px; font-weight: 800; color: var(--brand); }
.lp-plan__n span { font-size: 15px; font-family: var(--font-sans); color: var(--ink-soft); font-weight: 600; }
.lp-plan__t { font-weight: 800; font-size: 16px; margin: 2px 0 14px; color: var(--ink); }
.lp-plan ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.lp-plan li { position: relative; padding-left: 24px; font-size: 13.7px; line-height: 1.5; color: var(--ink-soft); }
.lp-plan li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--brand); font-weight: 800; }

/* ---------- TÍNH NĂNG ---------- */
.lp-feat { display: flex; gap: 13px; background: var(--paper); border: 1px solid var(--border); border-radius: 14px; padding: 16px; box-shadow: var(--shadow-sm); transition: transform .15s, box-shadow .15s; }
.lp-feat:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.lp-feat__ic { font-size: 26px; line-height: 1; flex: 0 0 auto; }
.lp-feat h3 { font-size: 15.5px; margin: 0 0 4px; color: var(--brand-2); }
.lp-feat p { font-size: 13.3px; line-height: 1.5; color: var(--ink-soft); margin: 0; }

/* ---------- VỀ TÁC GIẢ ---------- */
.lp-author__in { display: flex; gap: 22px; align-items: center; background: var(--paper); border: 1px solid var(--border); border-radius: 18px; padding: 26px; box-shadow: var(--shadow-sm); }
.lp-author__ava { flex: 0 0 auto; width: 92px; height: 92px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 40px; background: linear-gradient(135deg, var(--brand-soft), var(--accent-soft)); border: 1px solid var(--border); }
.lp-author__t h3 { margin: 0 0 4px; font-size: 19px; color: var(--brand-2); }
.lp-author__role { font-size: 13px; color: var(--ink-soft); margin: 0 0 8px; }
.lp-author__t p { font-size: 14.5px; line-height: 1.6; color: var(--ink); margin: 0; }

/* ---------- MỤC LỤC 5 CHƯƠNG ---------- */
.lp-ch { display: flex; gap: 16px; align-items: flex-start; background: var(--paper); border: 1px solid var(--border); border-radius: 14px; padding: 18px 20px; text-decoration: none; color: inherit; box-shadow: var(--shadow-sm); transition: transform .15s, box-shadow .15s, border-color .15s; }
.lp-ch:hover { transform: translateX(4px); box-shadow: var(--shadow); border-color: var(--brand); }
.lp-ch__n { flex: 0 0 auto; width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-family: var(--font-serif); font-size: 22px; font-weight: 800; color: #fff; background: linear-gradient(135deg, var(--brand), var(--accent)); }
.lp-ch__t b { display: block; font-size: 16px; color: var(--brand-2); margin-bottom: 3px; }
.lp-ch__t span { font-size: 13.5px; line-height: 1.5; color: var(--ink-soft); }
.lp-ch__go { margin-left: auto; align-self: center; color: var(--brand); font-size: 22px; flex: 0 0 auto; }
.lp-toc__more { text-align: center; margin-top: 22px; }

/* ---------- FAQ ---------- */
.lp-faq { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.lp-faq details { background: var(--paper); border: 1px solid var(--border); border-radius: 12px; padding: 4px 16px; box-shadow: var(--shadow-sm); }
.lp-faq summary { cursor: pointer; list-style: none; padding: 13px 0; font-weight: 700; font-size: 15px; color: var(--ink); display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.lp-faq summary::-webkit-details-marker { display: none; }
.lp-faq summary::after { content: "+"; color: var(--brand); font-size: 22px; font-weight: 700; transition: transform .2s; }
.lp-faq details[open] summary::after { transform: rotate(45deg); }
.lp-faq details p { margin: 0 0 14px; font-size: 14px; line-height: 1.6; color: var(--ink-soft); }

/* ---------- CTA cuối ---------- */
.lp-cta { margin: 20px auto 60px; text-align: center; background: linear-gradient(135deg, var(--brand), var(--accent)); border-radius: 24px; padding: 48px 24px; color: #fff; box-shadow: var(--shadow); }
.lp-cta h2 { font-family: var(--font-serif); font-size: clamp(24px, 4vw, 36px); margin: 0 0 10px; }
.lp-cta p { font-size: 16px; margin: 0 0 24px; opacity: .95; }
.lp-cta .lp-btn { background: #fff; color: var(--brand-2); }
.lp-cta .lp-btn:hover { background: var(--bg-2); }

/* ---------- FOOTER ---------- */
.lp-footer { border-top: 1px solid var(--border); background: rgba(255, 253, 246, .7); }
.lp-footer__in { display: flex; flex-wrap: wrap; gap: 22px; justify-content: space-between; padding: 30px 0; }
.lp-footer__brand b { color: var(--brand); font-size: 16px; }
.lp-footer__brand p { margin: 6px 0 0; font-size: 13px; color: var(--ink-soft); max-width: 360px; line-height: 1.55; }
.lp-footer__links { display: flex; flex-direction: column; gap: 7px; }
.lp-footer__links a { color: var(--ink-soft); text-decoration: none; font-size: 13.5px; }
.lp-footer__links a:hover { color: var(--brand); }
.lp-footer__copy { text-align: center; padding: 14px 0 26px; font-size: 12.5px; color: var(--ink-soft); }

/* ---------- nút Tài khoản nổi của store.js cho rõ trên nền sáng ---------- */
body.landing > .rd-btn { top: 10px !important; right: 12px !important; width: 42px; height: 42px; background: var(--brand); color: #fff8e7; border: 1px solid rgba(255, 255, 255, .25); box-shadow: var(--shadow-sm); }
body.landing > .rd-btn:hover { background: var(--brand-2); }

/* ---------- hiệu ứng cuộn (chỉ bật khi landing.js thêm .lp-anim) ---------- */
body.lp-anim .lp-reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
body.lp-anim .lp-reveal.is-in { opacity: 1; transform: none; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 920px) {
  .lp-hero__in { grid-template-columns: 1fr; text-align: center; }
  .lp-hero__cta { justify-content: center; }
  .lp-hero__sub { margin-left: auto; margin-right: auto; }
  .lp-cover { order: -1; margin-bottom: 18px; }
  .lp-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .lp-plans { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .lp-nav__links { position: absolute; top: 60px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--paper); border-bottom: 1px solid var(--border); box-shadow: var(--shadow); padding: 8px; display: none; }
  .lp-nav__links.is-open { display: flex; }
  .lp-nav__links a { padding: 12px 14px; border-radius: 8px; }
  .lp-burger { display: block; }
  .lp-grid--3, .lp-grid--4, .lp-grid--2 { grid-template-columns: 1fr; }
  .lp-author__in { flex-direction: column; text-align: center; }
  .lp-footer__in { flex-direction: column; }
}