/* ══ Lặng Trang — Cà Phê Sách Yên Tĩnh ══
   Identity Token: ZEN-MINIMAL — near-monochrome, whitespace lớn, 1 accent duy nhất
   Font: Cormorant Garamond (heading, weight 300) + DM Sans (body) | Bootstrap 5.3.8
   Accent: Forest Green #3f5b45 — gợi liên tưởng gáy sách cũ, cây xanh cửa sổ đọc sách
   Nav: Nav-4 Minimal Top Line | Hero: H4 Centered Minimal + Carousel 4 slide
   Class prefix: csa- (Cafe Sách)
*/

:root {
  --bg: #f8f6f1;
  --surface: #ffffff;
  --dark: #14170f;
  --dark2: #1c2016;
  --border: #e2ddd0;
  --border-light: #edeae0;
  --text: #201e17;
  --text-2: #6a6656;
  --text-3: #a29c8a;
  --accent: #3f5b45;
  --accent-h: #314736;
  --accent-light: #e9efe8;
  --accent-mid: #628067;
  --danger: #a8433a;

  --serif: 'Cormorant Garamond', serif;
  --sans: 'DM Sans', sans-serif;
  --bs-body-font-family: var(--sans);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  font-weight: 400;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

h1, h2, h3, h4, h5, h6 { font-family: var(--serif); font-weight: 300; line-height: 1.14; margin: 0; letter-spacing: -.2px; }

/* ── Layout ── */
.csa-container { max-width: 1100px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 80px); }
.csa-container-narrow { max-width: 760px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 80px); }
.sec-pad { padding: clamp(72px, 10vw, 130px) 0; }
.sec-pad-sm { padding: clamp(48px, 7vw, 84px) 0; }
.sec-bg { background: var(--bg); }
.sec-surface { background: var(--surface); }
.sec-dark { background: var(--dark); color: rgba(255,255,255,.9); }

/* ── Reveal animation ── */
[data-reveal] { opacity: 0; transform: translateY(30px); transition: opacity .8s cubic-bezier(.16,1,.3,1), transform .8s cubic-bezier(.16,1,.3,1); }
[data-reveal].visible { opacity: 1; transform: none; }
[data-reveal-d1] { transition-delay: .1s; }
[data-reveal-d2] { transition-delay: .2s; }
[data-reveal-d3] { transition-delay: .3s; }

/* ── Section header ── */
.csa-eyebrow { display: flex; align-items: center; gap: 10px; font-size: 11.5px; font-weight: 500; letter-spacing: 2.4px; text-transform: uppercase; color: var(--accent); margin-bottom: 18px; }
.csa-eyebrow::before { content: ''; width: 26px; height: 1px; background: var(--accent); }
.csa-eyebrow.on-dark { color: var(--accent-mid); }
.csa-eyebrow.on-dark::before { background: var(--accent-mid); }
.csa-eyebrow.center { justify-content: center; }

.csa-sec-title { font-size: clamp(30px, 4.4vw, 48px); font-weight: 300; letter-spacing: -.5px; margin-bottom: 18px; }
.csa-sec-title em { font-style: italic; color: var(--accent); }
.csa-sec-sub { font-size: 15.5px; font-weight: 400; line-height: 1.8; color: var(--text-2); max-width: 540px; }
.csa-sec-head { margin-bottom: clamp(44px, 6vw, 70px); }
.csa-sec-head.center { text-align: center; }
.csa-sec-head.center .csa-sec-sub { margin-left: auto; margin-right: auto; }

/* ══ Nav-4: Minimal Top Line ══ */
#csa-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 500; background: transparent; border-top: 3px solid var(--accent); transition: background .35s ease, box-shadow .35s ease; }
#csa-nav.scrolled { background: rgba(248,246,241,.95); backdrop-filter: blur(14px); box-shadow: 0 1px 0 var(--border); }
.csa-nav-inner { height: 78px; display: flex; align-items: center; justify-content: space-between; }
.csa-logo { font-family: var(--serif); font-size: 22px; font-weight: 400; letter-spacing: .5px; text-decoration: none; color: var(--text); display: flex; flex-direction: column; line-height: 1.1; }
.csa-logo span { font-family: var(--sans); font-size: 9.5px; font-weight: 500; letter-spacing: 2.6px; text-transform: uppercase; color: var(--accent); margin-top: 4px; }
.csa-nav-links { display: flex; align-items: center; gap: 34px; }
.csa-nav-links a { font-size: 12.5px; font-weight: 500; letter-spacing: 1.2px; text-transform: uppercase; text-decoration: none; color: var(--text-2); position: relative; padding-bottom: 3px; transition: color .2s; }
.csa-nav-links a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px; background: var(--accent); transition: right .28s cubic-bezier(.16,1,.3,1); }
.csa-nav-links a:hover, .csa-nav-links a.active { color: var(--text); }
.csa-nav-links a:hover::after, .csa-nav-links a.active::after { right: 0; }
.csa-nav-cta { font-family: var(--sans); font-size: 12.5px; font-weight: 500; letter-spacing: 1px; text-transform: uppercase; color: var(--text); background: transparent; border: none; border-bottom: 1px solid var(--text); padding-bottom: 4px; text-decoration: none; cursor: pointer; transition: color .2s, border-color .2s; white-space: nowrap; }
.csa-nav-cta:hover { color: var(--accent); border-color: var(--accent); }

.csa-burger { display: none; flex-direction: column; gap: 5px; background: transparent; border: none; cursor: pointer; padding: 8px; }
.csa-burger span { display: block; width: 22px; height: 1.5px; background: var(--text); transition: all .3s; }
.csa-burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.csa-burger.open span:nth-child(2) { opacity: 0; }
.csa-burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.csa-mobile { position: fixed; inset: 0; background: var(--bg); z-index: 490; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 28px; opacity: 0; pointer-events: none; transition: opacity .3s; }
.csa-mobile.open { opacity: 1; pointer-events: auto; }
.csa-mobile a { font-family: var(--serif); font-size: 28px; font-weight: 300; color: var(--text); text-decoration: none; }
.csa-mobile a:hover { color: var(--accent); }

@media (max-width: 860px) {
  .csa-nav-links, .csa-nav-cta { display: none; }
  .csa-burger { display: flex; }
}

/* ══ Buttons — text-only underline, no bg (ZEN-MINIMAL) ══ */
.csa-btn { display: inline-flex; align-items: center; gap: 9px; font-family: var(--sans); font-size: 13px; font-weight: 500; letter-spacing: 1.4px; text-transform: uppercase; text-decoration: none; background: transparent; border: none; border-bottom: 1px solid currentColor; padding-bottom: 5px; color: var(--text); cursor: pointer; transition: color .2s, border-color .2s, gap .2s; }
.csa-btn:hover { color: var(--accent); gap: 13px; }
.csa-btn-accent { color: var(--accent); }
.csa-btn-accent:hover { color: var(--accent-h); }
.csa-btn-light { color: rgba(255,255,255,.85); }
.csa-btn-light:hover { color: #fff; }
.csa-btn svg { width: 13px; height: 13px; flex-shrink: 0; }

/* ══ Carousel Hero — H4 Centered Minimal ══ */
.csa-hero { position: relative; height: 100vh; min-height: 640px; overflow: hidden; background: var(--bg); }
.csa-hero-slide { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: opacity .8s ease; padding-top: 60px; }
.csa-hero-slide.active { opacity: 1; visibility: visible; }
.csa-hero-inner { text-align: center; max-width: 720px; padding: 0 24px; display: flex; flex-direction: column; align-items: center; }
.csa-hero-label { font-size: 11.5px; font-weight: 500; letter-spacing: 3px; text-transform: uppercase; color: var(--accent); margin-bottom: 22px; }
.csa-hero-title { font-family: var(--serif); font-weight: 300; font-size: clamp(36px, 6vw, 60px); line-height: 1.12; letter-spacing: -.5px; color: var(--text); margin-bottom: 20px; }
.csa-hero-title em { font-style: italic; color: var(--accent); }
.csa-hero-sub { font-size: 15.5px; font-weight: 400; line-height: 1.8; color: var(--text-2); max-width: 460px; margin: 0 auto 32px; }
.csa-hero-actions { display: flex; align-items: center; gap: 32px; margin-bottom: 40px; }
.csa-hero-img-wrap { position: relative; width: min(300px, 68vw); border: 1px solid var(--border); padding: 14px 14px 20px; background: var(--surface); }
.csa-hero-img { width: 100%; aspect-ratio: 3/4; object-fit: cover; display: block; }
.csa-hero-bookmark { position: absolute; top: -4px; right: 26px; width: 18px; height: 46px; background: var(--accent); clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 78%, 0 100%); }

.csa-hero-nav-btn { position: absolute; top: 50%; transform: translateY(-50%); width: 52px; height: 52px; border-radius: 50%; background: rgba(255,255,255,.55); backdrop-filter: blur(10px); border: 1px solid rgba(0,0,0,.08); display: flex; align-items: center; justify-content: center; cursor: pointer; z-index: 20; transition: background .2s; }
.csa-hero-nav-btn:hover { background: rgba(255,255,255,.85); }
.csa-hero-prev { left: clamp(12px, 3vw, 40px); }
.csa-hero-next { right: clamp(12px, 3vw, 40px); }
.csa-hero-nav-btn svg { width: 16px; height: 16px; color: var(--text); }

.csa-hero-dots { position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 20; }
.csa-hero-dot { width: 24px; height: 2px; background: var(--border); border: none; cursor: pointer; padding: 0; transition: background .2s; }
.csa-hero-dot.active { background: var(--accent); }

@media (max-width: 640px) {
  .csa-hero { height: 90vh; }
  .csa-hero-actions { flex-direction: column; gap: 16px; }
  .csa-hero-nav-btn { width: 42px; height: 42px; }
}

/* ══ Page hero (inner pages) ══ */
.csa-page-hero { padding: clamp(150px, 20vw, 208px) 0 clamp(56px, 8vw, 88px); text-align: center; }
.csa-page-hero .csa-eyebrow { justify-content: center; }
.csa-page-hero h1 { font-size: clamp(36px, 5.6vw, 62px); font-weight: 300; margin-bottom: 16px; }
.csa-page-hero h1 em { font-style: italic; color: var(--accent); }
.csa-page-hero p { font-size: 15.5px; color: var(--text-2); max-width: 520px; margin: 0 auto; line-height: 1.8; }

/* ══ BOOK-LIST — menu items, thức uống (pure typography, không border card) ══ */
.csa-book-list { list-style: none; margin: 0; padding: 0; }
.csa-book-list li { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--border-light); }
.csa-book-list li:first-child { border-top: 1px solid var(--border-light); }
.csa-bl-main { flex: 1; }
.csa-bl-name { font-family: var(--serif); font-size: 19px; font-weight: 400; color: var(--text); margin-bottom: 4px; }
.csa-bl-tag { display: inline-block; font-size: 10px; font-weight: 500; letter-spacing: .8px; text-transform: uppercase; color: var(--accent); border: 1px solid var(--accent-light); padding: 1px 7px; margin-left: 10px; vertical-align: middle; }
.csa-bl-desc { font-size: 13.5px; color: var(--text-2); line-height: 1.65; max-width: 440px; }
.csa-bl-price { font-family: var(--serif); font-size: 17px; color: var(--accent); flex-shrink: 0; white-space: nowrap; }

/* ══ Menu category tabs ══ */
.csa-menu-tabs { display: flex; flex-wrap: wrap; gap: 8px 28px; margin-bottom: 8px; border-bottom: 1px solid var(--border); padding-bottom: 0; }
.csa-mt-btn { font-family: var(--sans); font-size: 12.5px; font-weight: 500; letter-spacing: 1.2px; text-transform: uppercase; background: none; border: none; padding: 0 0 14px; color: var(--text-3); cursor: pointer; position: relative; transition: color .2s; }
.csa-mt-btn::after { content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--accent); transform: scaleX(0); transition: transform .25s ease; }
.csa-mt-btn.active { color: var(--text); }
.csa-mt-btn.active::after { transform: scaleX(1); }
.csa-mt-btn:hover:not(.active) { color: var(--text-2); }
.csa-menu-panel { display: none; padding-top: 8px; }
.csa-menu-panel.active { display: block; }

/* ══ Reading-corner grid — không gian (photo + caption thuần) ══ */
.csa-corner-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px 32px; }
.csa-corner { text-decoration: none; color: var(--text); display: block; }
.csa-corner-img { width: 100%; aspect-ratio: 4/5; object-fit: cover; margin-bottom: 18px; }
.csa-corner-name { font-family: var(--serif); font-size: 21px; font-weight: 400; margin-bottom: 6px; }
.csa-corner-desc { font-size: 13px; color: var(--text-3); line-height: 1.6; }
@media (max-width: 980px) { .csa-corner-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .csa-corner-grid { grid-template-columns: 1fr; } }

/* Featured corners (index) — asymmetric */
.csa-corner-featured { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.csa-corner-featured .csa-corner:first-child { grid-column: 1 / -1; }
.csa-corner-featured .csa-corner:first-child .csa-corner-img { aspect-ratio: 21/9; }
@media (max-width: 760px) { .csa-corner-featured { grid-template-columns: 1fr; } }

/* ══ Gallery masonry (khong-gian.html) ══ */
.csa-gallery { columns: 3; column-gap: 14px; }
.csa-gallery img { width: 100%; margin-bottom: 14px; break-inside: avoid; }
.csa-gallery figure { margin: 0 0 14px; break-inside: avoid; }
.csa-gallery figcaption { font-size: 11.5px; color: var(--text-3); letter-spacing: .3px; margin-top: 8px; text-align: center; }
@media (max-width: 768px) { .csa-gallery { columns: 2; } }
@media (max-width: 480px) { .csa-gallery { columns: 1; } }

/* ══ Quote / philosophy block ══ */
.csa-quote { text-align: center; max-width: 720px; margin: 0 auto; }
.csa-quote blockquote { font-family: var(--serif); font-size: clamp(22px, 3vw, 32px); font-weight: 300; font-style: italic; line-height: 1.5; color: var(--text); margin: 0 0 26px; }
.csa-quote-name { font-size: 13px; font-weight: 600; letter-spacing: .5px; }
.csa-quote-role { font-size: 12.5px; color: var(--text-3); }
.sec-dark .csa-quote blockquote { color: #fff; }
.sec-dark .csa-quote-role { color: rgba(255,255,255,.4); }

/* ══ STAT-BAR ══ */
.csa-stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(36px, 8vw, 76px); text-align: center; }
.csa-stat-num { font-family: var(--serif); font-weight: 300; font-size: clamp(36px, 5vw, 54px); color: var(--text); line-height: 1; margin-bottom: 12px; }
.csa-stat-num .u { color: var(--accent); }
.csa-stat-label { font-size: 11.5px; font-weight: 500; letter-spacing: 1.2px; text-transform: uppercase; color: var(--text-3); }
.sec-dark .csa-stat-num { color: #fff; }
@media (max-width: 1024px) { .csa-stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .csa-stats-grid { grid-template-columns: 1fr; gap: 36px; } }

/* ══ ALTERNATING-STRIPS ══ */
.csa-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.csa-strip.reverse { direction: rtl; }
.csa-strip.reverse > * { direction: ltr; }
.csa-strip-img { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.csa-strip-text h3, .csa-strip-text h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 300; margin-bottom: 18px; }
.csa-strip-text h3 em, .csa-strip-text h2 em { font-style: italic; color: var(--accent); }
.csa-strip-text p { font-size: 15px; color: var(--text-2); line-height: 1.85; margin-bottom: 14px; }
@media (max-width: 860px) {
  .csa-strip, .csa-strip.reverse { grid-template-columns: 1fr; direction: ltr; gap: 28px; }
}

/* ══ Rule list (quy định giữ yên lặng) ══ */
.csa-rule-list { list-style: none; margin: 0; padding: 0; counter-reset: rule; }
.csa-rule-list li { counter-increment: rule; display: grid; grid-template-columns: 46px 1fr; gap: 22px; padding: 24px 0; border-bottom: 1px solid var(--border-light); }
.csa-rule-list li:first-child { border-top: 1px solid var(--border-light); }
.csa-rule-list li::before { content: counter(rule, decimal-leading-zero); font-family: var(--serif); font-size: 16px; color: var(--accent); }
.csa-rule-body h4 { font-family: var(--sans); font-size: 15px; font-weight: 500; margin-bottom: 6px; }
.csa-rule-body p { font-size: 13.5px; color: var(--text-2); line-height: 1.7; margin: 0; }

/* ══ Testimonial cards ══ */
.csa-testi-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 46px 60px; }
.csa-testi-card blockquote { font-family: var(--serif); font-size: 19px; font-weight: 400; font-style: italic; line-height: 1.6; margin: 0 0 18px; }
.csa-testi-card cite { font-style: normal; font-size: 12.5px; color: var(--text-3); display: block; }
.csa-testi-card cite b { color: var(--text); font-weight: 600; }
@media (max-width: 760px) { .csa-testi-grid { grid-template-columns: 1fr; } }

/* ══ FAQ accordion — custom, zen style ══ */
.csa-faq-item { border-bottom: 1px solid var(--border); }
.csa-faq-item:first-child { border-top: 1px solid var(--border); }
.csa-faq-q { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 25px 0; cursor: pointer; background: none; border: none; width: 100%; text-align: left; font-family: var(--serif); font-size: clamp(16px, 2vw, 20px); font-weight: 400; color: var(--text); }
.csa-faq-icon { position: relative; width: 16px; height: 16px; flex-shrink: 0; }
.csa-faq-icon::before, .csa-faq-icon::after { content: ''; position: absolute; background: var(--accent); transition: transform .3s; }
.csa-faq-icon::before { top: 50%; left: 0; width: 16px; height: 1px; transform: translateY(-50%); }
.csa-faq-icon::after { left: 50%; top: 0; width: 1px; height: 16px; transform: translateX(-50%); }
.csa-faq-item.open .csa-faq-icon::after { transform: translateX(-50%) rotate(90deg) scale(0); }
.csa-faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.csa-faq-a-inner { padding: 0 0 25px; font-size: 14.5px; color: var(--text-2); line-height: 1.85; max-width: 680px; }

/* ══ Forms — underline style (ZEN-MINIMAL) ══ */
.csa-form-group { margin-bottom: 24px; }
.csa-form-label { display: block; font-size: 12px; font-weight: 500; letter-spacing: 1px; text-transform: uppercase; color: var(--text-3); margin-bottom: 10px; }
.csa-form-control { width: 100%; font-family: var(--sans); font-size: 15px; color: var(--text); background: transparent; border: none; border-bottom: 1px solid var(--border); padding: 10px 0; transition: border-color .2s; }
.csa-form-control:focus { outline: none; border-color: var(--accent); }
.csa-form-control::placeholder { color: var(--text-3); }
textarea.csa-form-control { resize: vertical; min-height: 110px; }
select.csa-form-control { cursor: pointer; }

/* ══ Contact info list ══ */
.csa-info-list { list-style: none; margin: 0; padding: 0; }
.csa-info-list li { padding: 20px 0; border-bottom: 1px solid var(--border); }
.csa-info-list li:first-child { border-top: 1px solid var(--border); }
.csa-info-label { font-size: 11px; font-weight: 500; letter-spacing: 1.2px; text-transform: uppercase; color: var(--text-3); margin-bottom: 6px; }
.csa-info-value { font-family: var(--serif); font-size: 19px; }
.csa-info-value a { text-decoration: none; }
.csa-info-value a:hover { color: var(--accent); }

/* ══ CTA band ══ */
.csa-cta-band { text-align: center; padding: clamp(70px, 10vw, 118px) 0; }
.csa-cta-band h2 { font-size: clamp(28px, 4.4vw, 46px); font-weight: 300; margin-bottom: 26px; }
.csa-cta-band h2 em { font-style: italic; color: var(--accent-mid); }

/* ══ Footer — 2-col minimal, no social icons ══ */
.csa-footer { background: var(--dark); color: rgba(255,255,255,.6); padding: clamp(64px, 8vw, 100px) 0 0; }
.csa-footer-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 60px; padding-bottom: 60px; border-bottom: 1px solid rgba(255,255,255,.08); }
.csa-footer-logo { font-family: var(--serif); font-size: 25px; color: #fff; margin-bottom: 6px; display: block; text-decoration: none; }
.csa-footer-logo span { display: block; font-family: var(--sans); font-size: 9.5px; font-weight: 500; letter-spacing: 2.4px; text-transform: uppercase; color: var(--accent-mid); margin-top: 6px; }
.csa-footer-desc { font-size: 14px; line-height: 1.85; max-width: 380px; color: rgba(255,255,255,.45); margin-top: 18px; }
.csa-footer-cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.csa-footer-col h5 { font-family: var(--sans); font-size: 11.5px; font-weight: 500; letter-spacing: 1.4px; text-transform: uppercase; color: rgba(255,255,255,.4); margin-bottom: 20px; }
.csa-footer-col a, .csa-footer-col span { display: block; font-size: 14px; color: rgba(255,255,255,.65); text-decoration: none; margin-bottom: 13px; transition: color .2s; }
.csa-footer-col a:hover { color: #fff; }

.csa-footer-maps { height: 300px; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 16px rgba(0,0,0,.1); margin: 44px 0; border: 1px solid rgba(255,255,255,.08); }
.csa-footer-maps iframe { width: 100%; height: 100%; border: 0; filter: grayscale(.35) contrast(1.05); }

.csa-footer-bottom { display: flex; align-items: center; justify-content: space-between; padding: 26px 0; font-size: 12px; color: rgba(255,255,255,.3); flex-wrap: wrap; gap: 12px; }
.csa-footer-bottom a { color: rgba(255,255,255,.3); text-decoration: none; margin-left: 20px; }
.csa-footer-bottom a:hover { color: #fff; }

@media (max-width: 760px) {
  .csa-footer-grid, .csa-footer-cols { grid-template-columns: 1fr; }
  .csa-footer-cols { gap: 30px; margin-top: 30px; }
}

/* ══ Zalo float ══ */
.csa-zalo { position: fixed; bottom: 28px; right: 28px; z-index: 400; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.csa-zalo-tip { font-size: 12px; background: var(--text); color: #fff; padding: 6px 12px; border-radius: 6px; opacity: 0; transform: translateX(6px); transition: all .2s; pointer-events: none; white-space: nowrap; }
.csa-zalo:hover .csa-zalo-tip { opacity: 1; transform: none; }
.csa-zalo-btn { width: 50px; height: 50px; border-radius: 50%; background: #0068FF; display: flex; align-items: center; justify-content: center; border: none; box-shadow: 0 4px 18px rgba(0,104,255,.35); cursor: pointer; transition: transform .2s; }
.csa-zalo-btn:hover { transform: scale(1.08); }
.csa-zalo-btn svg { width: 24px; height: 24px; }

/* ══ Utility ══ */
.text-white-50 { color: rgba(255,255,255,.5); }
.csa-divider { height: 1px; background: var(--border); border: none; margin: 0; }