/* ============================================================
   Hơi Thở Biển — layout scheme: sticky mega-nav → hero (spotlight
   light-on-water, ~70vh) → wave ticker divider → feature grid (4-up)
   → zigzag card-on-photo → stacked gallery → live stats/clock band →
   chat-bubble reviews → icon-step timeline → single-highlight pricing
   → two-col FAQ → inline lead form (before footer) → live-hours footer.
   Modifier: flat (data-mod="flat"). Theme: dark deep-sea.
   Axes: cards 3-in-row, soft cards, sharp 2px buttons, circle icons,
   left align, SVG dividers, radius 0, fade-up reveal.
   Palette: bg #0a2733 / #08222c, panel #0e3140, text #e6f2f0,
   muted #8fb2b3, accent aquamarine #4fd1c5, accent sandy #dcc9a0.
   Fonts: Caveat (headings accent), Nunito Sans (body).
   ============================================================ */

:root{
  --bg:#0a2733;
  --bg-2:#08222c;
  --panel:#0e3140;
  --panel-2:#12394a;
  --text:#e6f2f0;
  --muted:#8fb2b3;
  --line:rgba(230,242,240,.12);
  --line-strong:rgba(230,242,240,.22);
  --aqua:#4fd1c5;
  --aqua-deep:#2fa89d;
  --sand:#dcc9a0;
  --shadow:0 18px 44px rgba(0,0,0,.42);
  --shadow-soft:0 8px 22px rgba(0,0,0,.30);
  --wrap:1180px;
  --s1:8px; --s2:16px; --s3:24px; --s4:40px; --s5:64px; --s6:96px;
  --f-head:"Caveat", "Segoe UI", cursive;
  --f-body:"Nunito Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--f-body);
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.section{padding:var(--s6) 0}
.eyebrow{
  font-family:var(--f-body);
  text-transform:uppercase;
  letter-spacing:.18em;
  font-size:12.5px;
  font-weight:700;
  color:var(--aqua);
  margin:0 0 14px;
}
h1,h2,h3{font-family:var(--f-head);font-weight:700;line-height:1.05;margin:0;color:var(--text)}
h2.section-title{font-size:clamp(38px,5.2vw,60px);margin-bottom:14px}
.section-lead{color:var(--muted);max-width:56ch;margin:0 0 var(--s4);font-size:18px}

/* buttons — sharp 2px */
.btn{
  display:inline-block;
  font-family:var(--f-body);
  font-weight:800;
  font-size:15px;
  letter-spacing:.02em;
  padding:14px 26px;
  border:2px solid var(--aqua);
  background:var(--aqua);
  color:#052027;
  border-radius:0;
  cursor:pointer;
  transition:transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(79,209,197,.28)}
.btn--ghost{background:transparent;color:var(--aqua)}
.btn--ghost:hover{background:rgba(79,209,197,.10)}

/* ---------- Nav / Mega panel ---------- */
.nav{
  position:sticky;top:0;z-index:60;
  display:flex;align-items:center;gap:20px;
  padding:14px 24px;
  max-width:100%;
  background:rgba(8,34,44,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav__logo{font-family:var(--f-head);font-size:30px;font-weight:700;color:var(--text);white-space:nowrap}
.nav__logo span{color:var(--aqua)}
.nav__links{display:flex;align-items:center;gap:6px;margin-left:14px}
.nav__links a,.nav__links button{
  font-family:var(--f-body);font-weight:700;font-size:14.5px;color:var(--muted);
  background:none;border:0;cursor:pointer;padding:9px 14px;border-radius:999px;
  transition:background .2s ease,color .2s ease;
}
.nav__links a:hover,.nav__links button:hover,.nav__links button[aria-expanded="true"]{
  background:rgba(79,209,197,.14);color:var(--text);
}
.nav__mega-wrap{position:relative}
.nav__panel{
  position:absolute;top:calc(100% + 12px);left:0;
  display:grid;grid-template-columns:repeat(2,minmax(160px,1fr));gap:8px 34px;
  background:var(--panel);border:1px solid var(--line-strong);
  padding:22px 26px;min-width:380px;box-shadow:var(--shadow);
}
.nav__panel[hidden]{display:none}
.nav__col-title{font-family:var(--f-body);font-weight:800;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--sand);margin:0 0 6px}
.nav__panel a{display:block;color:var(--muted);font-weight:600;padding:6px 0;border-radius:0}
.nav__panel a:hover{color:var(--aqua);background:none}
.nav__cta{margin-left:auto}
.nav__cta .btn{padding:11px 20px}
.nav__burger{display:none;margin-left:auto;background:none;border:2px solid var(--line-strong);color:var(--text);width:44px;height:40px;cursor:pointer;font-size:18px}

/* ---------- Hero — spotlight light-on-water ---------- */
.hero{
  position:relative;height:clamp(560px,70vh,760px);display:flex;align-items:center;
  overflow:hidden;background:var(--bg-2);
  border-bottom:1px solid var(--line);
}
.hero__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.55}
.hero__spot{
  position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(420px circle at var(--x,60%) var(--y,42%),
            rgba(79,209,197,.30), rgba(220,201,160,.10) 40%, transparent 66%);
  transition:background .18s ease-out;
  animation:heroPulse 6s ease-in-out infinite;
}
@keyframes heroPulse{0%,100%{opacity:.85}50%{opacity:1}}
.hero__scrim{position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,34,44,.92) 0%,rgba(8,34,44,.72) 45%,rgba(8,34,44,.30) 100%)}
.hero .wrap{position:relative;z-index:2;padding-top:70px;padding-bottom:70px}
.hero__text{max-width:660px}
.hero h1{font-size:clamp(52px,8.4vw,104px);line-height:.98}
.hero__sub{color:var(--text);font-size:20px;max-width:50ch;margin:20px 0 30px;opacity:.94}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero__meta{display:flex;gap:26px;margin-top:36px;flex-wrap:wrap}
.hero__meta div{border-left:2px solid var(--aqua);padding-left:14px}
.hero__meta b{font-family:var(--f-head);font-size:30px;display:block;line-height:1}
.hero__meta span{color:var(--muted);font-size:13.5px}

/* ---------- Wave ticker divider ---------- */
.divider--wave{
  background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  overflow:hidden;padding:12px 0;
}
.divider--wave .track{display:flex;gap:44px;white-space:nowrap;width:max-content;animation:tick 26s linear infinite}
.divider--wave .track span{color:var(--muted);font-weight:700;letter-spacing:.04em;font-size:14px;display:inline-flex;align-items:center;gap:44px}
.divider--wave .track span::after{content:"≈";color:var(--aqua);font-size:18px}
.divider--wave time{color:var(--sand);font-variant-numeric:tabular-nums}
@keyframes tick{from{transform:translateX(0)}to{transform:translateX(-50%)}}

.svg-wave{display:block;width:100%;height:38px;color:var(--panel)}

/* ---------- Feature grid 4-up ---------- */
.grid--4up{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:0;
  padding:26px 22px;box-shadow:var(--shadow-soft);
  transition:transform .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--aqua)}
.card--compact .ic{
  width:52px;height:52px;border-radius:50%;
  display:grid;place-items:center;margin-bottom:16px;
  background:rgba(79,209,197,.12);border:1px solid var(--line-strong);
  color:var(--aqua);font-size:24px;
}
.card--compact h3{font-family:var(--f-body);font-weight:800;font-size:17px;margin-bottom:6px;color:var(--text)}
.card--compact p{color:var(--muted);font-size:14.5px;margin:0}

/* article cards (bài viết) 3-in-row */
.grid--3up{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.post{
  background:var(--panel);border:1px solid var(--line);overflow:hidden;
  box-shadow:var(--shadow-soft);transition:transform .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;
}
.post:hover{transform:translateY(-4px);border-color:var(--aqua)}
.post__ph{aspect-ratio:16/10;overflow:hidden;background:var(--panel-2)}
.post__ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.post:hover .post__ph img{transform:scale(1.05)}
.post__body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.tag{align-self:flex-start;font-family:var(--f-body);font-weight:800;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--sand);background:rgba(220,201,160,.10);padding:4px 10px}
.post__body h3{font-family:var(--f-body);font-weight:800;font-size:19px;color:var(--text);line-height:1.25}
.post__body p{color:var(--muted);font-size:14.5px;margin:0}
.post__more{margin-top:auto;color:var(--aqua);font-weight:800;font-size:14px;padding-top:6px}

/* ---------- Zigzag card-on-photo ---------- */
.zz{display:flex;flex-direction:column;gap:var(--s5)}
.zz__row{position:relative;display:grid;grid-template-columns:1.4fr .9fr;align-items:center}
.zz__media{overflow:hidden;border:1px solid var(--line)}
.zz__media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.zz__card{
  position:relative;z-index:2;margin-left:-70px;
  background:var(--panel);border:1px solid var(--line-strong);
  padding:34px 32px;box-shadow:var(--shadow);
}
.zz__row--reverse{grid-template-columns:.9fr 1.4fr}
.zz__row--reverse .zz__media{order:2}
.zz__row--reverse .zz__card{order:1;margin-left:0;margin-right:-70px}
.zz__card h3{font-size:34px;margin-bottom:12px}
.zz__card p{color:var(--muted);margin:0 0 8px}
.zz__card ul{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:8px}
.zz__card li{padding-left:24px;position:relative;color:var(--text);font-size:15px}
.zz__card li::before{content:"≈";position:absolute;left:0;color:var(--aqua);font-weight:900}

/* ---------- Stacked card gallery ---------- */
.gallery--stack{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.gallery--stack figure{
  position:relative;margin:0;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-soft);transition:transform .3s ease;
}
.gallery--stack figure:nth-child(odd){transform:translateY(14px)}
.gallery--stack figure:hover{transform:translateY(0) scale(1.02);z-index:2}
.gallery--stack img{width:100%;height:100%;object-fit:cover;aspect-ratio:3/4}
.gallery--stack figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 16px;font-size:13.5px;font-weight:700;
  background:linear-gradient(transparent,rgba(8,34,44,.9));
}

/* ---------- Stats / live clock band ---------- */
.stats{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:left}
.stat{border-left:2px solid var(--aqua);padding-left:18px}
.stat-num{font-family:var(--f-head);font-size:clamp(44px,6vw,64px);line-height:.9;color:var(--text);display:inline-block}
.stat-plus{color:var(--aqua);font-family:var(--f-head);font-size:40px}
.stat-lbl{display:block;color:var(--muted);font-size:14px;margin-top:6px}
.stats-clock{margin:var(--s4) 0 0;color:var(--muted);font-size:16px}
.stats-clock time{color:var(--sand);font-weight:800;font-variant-numeric:tabular-nums;font-size:18px}

/* ---------- Chat bubble reviews ---------- */
.tm--chat{display:flex;flex-direction:column;gap:18px;max-width:820px}
.bubble{
  position:relative;max-width:74%;padding:18px 22px;
  background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-soft);
}
.bubble p{margin:0 0 10px;font-size:15.5px;line-height:1.6}
.bubble--in{align-self:flex-start;border-left:3px solid var(--aqua)}
.bubble--out{align-self:flex-end;border-right:3px solid var(--sand)}
.bubble__who{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.bubble__ava{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-family:var(--f-head);font-size:20px;color:#052027;background:var(--aqua)}
.bubble--out .bubble__ava{background:var(--sand)}

/* ---------- Icon step timeline ---------- */
.tl--icons{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.tl--icons::before{content:"";position:absolute;top:26px;left:8%;right:8%;height:2px;background:var(--line-strong);z-index:0}
.node{position:relative;z-index:1;text-align:left}
.node .dot{
  width:54px;height:54px;border-radius:50%;display:grid;place-items:center;
  background:var(--panel);border:2px solid var(--aqua);color:var(--aqua);font-size:24px;margin-bottom:16px;
}
.node h3{font-family:var(--f-body);font-weight:800;font-size:17px;color:var(--text);margin-bottom:6px}
.node p{color:var(--muted);font-size:14.5px;margin:0}

/* ---------- Pricing single highlight ---------- */
.pricing--highlight{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:center}
.price-card{background:var(--panel);border:1px solid var(--line);padding:32px 28px;display:flex;flex-direction:column;gap:14px}
.price-card--muted{opacity:.72}
.price-card--main{
  border:2px solid var(--aqua);transform:scale(1.05);box-shadow:var(--shadow);
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
}
.price-card h3{font-family:var(--f-body);font-weight:800;font-size:20px;color:var(--text)}
.price-badge{align-self:flex-start;font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#052027;background:var(--aqua);padding:4px 10px}
.price-amt{font-family:var(--f-head);font-size:52px;line-height:1;color:var(--text)}
.price-amt small{font-family:var(--f-body);font-size:15px;color:var(--muted);font-weight:600}
.price-card ul{list-style:none;margin:8px 0 0;padding:0;display:grid;gap:10px}
.price-card li{padding-left:26px;position:relative;font-size:15px;color:var(--text)}
.price-card li::before{content:"✓";position:absolute;left:0;color:var(--aqua);font-weight:900}
.price-note{color:var(--muted);font-size:13.5px;margin-top:4px}

/* ---------- FAQ two-col ---------- */
.faq--2col{display:grid;grid-template-columns:1fr 1fr;gap:16px 28px}
.faq--2col details{border:1px solid var(--line);background:var(--panel);padding:4px 20px}
.faq--2col summary{cursor:pointer;list-style:none;padding:18px 0;font-family:var(--f-body);font-weight:800;font-size:16.5px;color:var(--text);display:flex;justify-content:space-between;gap:14px;align-items:center}
.faq--2col summary::-webkit-details-marker{display:none}
.faq--2col summary::after{content:"+";color:var(--aqua);font-size:24px;font-weight:400}
.faq--2col details[open] summary::after{content:"–"}
.faq--2col details p{color:var(--muted);margin:0 0 18px;font-size:15px}

/* ---------- Inline lead form ---------- */
.lead{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.lead__inner{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.lead__inner h2{font-size:clamp(36px,4.6vw,52px);margin-bottom:12px}
.lead__inner .section-lead{margin-bottom:0}
.lead__points{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:10px}
.lead__points li{padding-left:26px;position:relative;color:var(--text)}
.lead__points li::before{content:"≈";position:absolute;left:0;color:var(--aqua);font-weight:900}
.form{background:var(--panel);border:1px solid var(--line-strong);padding:30px 28px;box-shadow:var(--shadow)}
.form .row{display:grid;gap:6px;margin-bottom:16px}
.form label{font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.02em}
.form input,.form select,.form textarea{
  font-family:var(--f-body);font-size:15.5px;padding:13px 15px;
  background:var(--bg-2);border:2px solid var(--line-strong);color:var(--text);border-radius:0;width:100%;
}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--aqua)}
.form textarea{min-height:88px;resize:vertical}
.form .btn{width:100%;margin-top:4px}
.form__legal{font-size:12.5px;color:var(--muted);margin:14px 0 0}
.form__legal a{color:var(--aqua);text-decoration:underline}
.hp-field{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
#formStatus{margin:12px 0 0;font-size:14px;font-weight:700}
#formStatus.error{color:#ff9a8a}

/* ---------- Footer ---------- */
.footer{background:var(--bg-2);border-top:1px solid var(--line);padding:var(--s5) 0 var(--s4)}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:var(--s4)}
.footer__logo{font-family:var(--f-head);font-size:34px;color:var(--text)}
.footer__logo span{color:var(--aqua)}
.footer p{color:var(--muted);font-size:14.5px;margin:12px 0 0;max-width:42ch}
.footer__status{display:inline-flex;align-items:center;gap:10px;margin-top:18px !important;font-weight:700;color:var(--text)}
.footer__status .dot{width:9px;height:9px;border-radius:50%;background:var(--aqua);box-shadow:0 0 0 4px rgba(79,209,197,.18)}
.footer__status time{color:var(--sand);font-variant-numeric:tabular-nums}
.footer__col h4{font-family:var(--f-body);font-weight:800;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--sand);margin:0 0 14px}
.footer__col a{display:block;color:var(--muted);padding:5px 0;font-size:14.5px}
.footer__col a:hover{color:var(--aqua)}
.footer__sched{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.footer__sched li{color:var(--muted);font-size:14px;display:flex;justify-content:space-between;gap:16px;max-width:220px}
.footer__sched li.today{color:var(--text);font-weight:700}
.footer__bar{border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:13.5px}
.footer__bar a{color:var(--muted)}
.footer__bar a:hover{color:var(--aqua)}

/* ---------- Legal pages ---------- */
.legal-header{border-bottom:1px solid var(--line);padding:16px 0;position:sticky;top:0;background:rgba(8,34,44,.9);backdrop-filter:blur(8px);z-index:50}
.legal-header .wrap{display:flex;align-items:center;justify-content:space-between}
.legal-header .nav__logo{font-size:26px}
.legal{max-width:760px;margin:0 auto;padding:var(--s6) 24px}
.legal h1{font-size:clamp(44px,6vw,64px);margin-bottom:8px}
.legal .updated{color:var(--muted);font-size:14px;margin:0 0 var(--s4)}
.legal h2{font-family:var(--f-body);font-weight:800;font-size:21px;color:var(--text);margin:var(--s4) 0 10px}
.legal p{color:var(--muted);margin:0 0 14px}
.legal a{color:var(--aqua);text-decoration:underline}
.legal ul{color:var(--muted);padding-left:22px;margin:0 0 14px}
.legal li{margin-bottom:6px}

/* ---------- Thank you ---------- */
.thanks{min-height:80vh;display:grid;place-items:center;text-align:center;padding:var(--s6) 24px}
.thanks__box{max-width:560px}
.thanks h1{font-size:clamp(52px,8vw,84px);margin-bottom:16px}
.thanks p{color:var(--muted);font-size:18px;margin:0 0 var(--s4)}
.thanks .ic{width:84px;height:84px;border-radius:50%;background:rgba(79,209,197,.12);border:2px solid var(--aqua);color:var(--aqua);display:grid;place-items:center;font-size:40px;margin:0 auto var(--s3)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .grid--4up{grid-template-columns:repeat(2,1fr)}
  .tl--icons{grid-template-columns:repeat(2,1fr)}
  .tl--icons::before{display:none}
  .gallery--stack{grid-template-columns:repeat(2,1fr)}
  .gallery--stack figure:nth-child(odd){transform:none}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:820px){
  .nav__links{display:none}
  .nav__burger{display:block}
  .nav.open .nav__links{
    display:flex;flex-direction:column;align-items:flex-start;gap:2px;
    position:absolute;top:100%;left:0;right:0;background:var(--panel);
    border-bottom:1px solid var(--line-strong);padding:14px 24px;
  }
  .nav.open .nav__panel{position:static;min-width:0;grid-template-columns:1fr;box-shadow:none;border:0;padding:8px 0}
  .nav__cta{display:none}
  .hero{height:auto;min-height:auto}
  .grid--3up{grid-template-columns:1fr}
  .zz__row,.zz__row--reverse{grid-template-columns:1fr;gap:0}
  .zz__row--reverse .zz__media{order:0}
  .zz__card,.zz__row--reverse .zz__card{margin:-40px 20px 0;order:0}
  .pricing--highlight{grid-template-columns:1fr}
  .price-card--main{transform:none}
  .faq--2col{grid-template-columns:1fr}
  .lead__inner{grid-template-columns:1fr;gap:28px}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .bubble{max-width:90%}
}
@media (max-width:520px){
  body{font-size:16px}
  .section{padding:var(--s5) 0}
  .grid--4up,.stats-grid,.gallery--stack{grid-template-columns:1fr}
  .tl--icons{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .hero__spot{animation:none;background:radial-gradient(460px circle at 55% 45%,rgba(79,209,197,.28),transparent 65%)}
  .reveal{opacity:1;transform:none}
}