/* ============================================================
   Nguồn Sức Sống — Layout scheme
   Header: nav-progress-line (sticky, scroll-progress bar)
   Hero:   hero-diagonal-split-bleed (copy left / photo bleed right, ~55vh)
   Flow:   4up feature grid → asymmetric zigzag → full-bleed stat band
           → simple timeline (30-day plan) → thumb-strip gallery
           → checklist → big-quote testimonial → reviews grid
           → time-block pricing → inline FAQ → full-width CTA form
           → badge-row footer
   Theme:  DARK. Modifier: outlined (1px borders, transparent fills).
   Cards:  2-in-row on tablet, elevated + outlined. Buttons: pill.
   Icons:  square tiles. Align: center. Dividers: inline SVG.
   Accents (max 2): turquoise #2dd4bf + citrus lime #d9f441.
   Reveal: scale-in on scroll. Fonts: Unbounded (display) / Manrope (body).
   Spacing scale: 8 / 16 / 24 / 40 / 64 / 96. Radius: 7px.
   ============================================================ */

:root{
  --bg:#0c1418;
  --bg-2:#0e181c;
  --panel:#12232a;
  --panel-2:#0f1e24;
  --text:#eef4f2;
  --muted:#9fb3b0;
  --accent:#2dd4bf;      /* turquoise */
  --accent-2:#d9f441;    /* citrus lime */
  --border:rgba(45,212,191,.28);
  --border-soft:rgba(238,244,242,.12);
  --radius:7px;
  --bw:1.5px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.75);
  --shadow-lift:0 26px 60px -26px rgba(0,0,0,.85);
  --sp-1:8px; --sp-2:16px; --sp-3:24px; --sp-4:40px; --sp-5:64px; --sp-6:96px;
  --maxw:1160px;
  --ff-head:'Unbounded',system-ui,sans-serif;
  --ff-body:'Manrope',system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  font-family:var(--ff-body);
  background:var(--bg);
  color:var(--text);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;height:auto;display:block}

h1,h2,h3{font-family:var(--ff-head);line-height:1.12;margin:0;letter-spacing:-.01em}
p{margin:0}
a{color:inherit}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding-inline:24px}
.container--narrow{max-width:780px}

.eyebrow{
  display:inline-block;
  font-family:var(--ff-head);
  font-weight:600;
  font-size:.72rem;
  text-transform:uppercase;
  letter-spacing:.22em;
  color:var(--accent);
  margin-bottom:14px;
}

.section{padding-block:clamp(56px,9vw,96px)}
.section--alt{background:var(--bg-2)}
.section__head{text-align:center;max-width:640px;margin:0 auto clamp(32px,5vw,56px)}
.section__title{
  font-size:clamp(1.7rem,4vw,2.5rem);
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.02em;
}
.section__sub{color:var(--muted);margin-top:16px;font-size:1.05rem}

/* ---------- Buttons (pill) ---------- */
.btn{
  --pad:14px 26px;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--ff-head);font-weight:600;font-size:.92rem;
  padding:var(--pad);
  border-radius:999px;
  border:var(--bw) solid transparent;
  text-decoration:none;cursor:pointer;
  transition:transform .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  letter-spacing:.01em;
}
.btn--primary{background:var(--accent);color:#04231f;border-color:var(--accent)}
.btn--primary:hover{transform:translateY(-2px);background:#4de3d0}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--border)}
.btn--ghost:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent)}
.btn--block{width:100%;padding:16px}

/* ---------- Nav progress ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(12,20,24,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-soft)}
.nav__inner{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:24px}
.nav__logo{font-family:var(--ff-head);font-weight:700;font-size:1.05rem;text-decoration:none;letter-spacing:.01em;white-space:nowrap}
.nav__links{display:flex;gap:26px;margin-left:auto}
.nav__links a{position:relative;text-decoration:none;color:var(--muted);font-weight:600;font-size:.92rem;transition:color .2s}
.nav__links a::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;background:var(--accent);transition:width .22s ease}
.nav__links a:hover{color:var(--text)}
.nav__links a:hover::after{width:100%}
.nav__cta{padding:9px 20px;font-size:.85rem}
.nav__bar{position:absolute;left:0;bottom:0;height:2px;width:var(--p,0%);background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .1s linear}

/* ---------- Hero (diagonal split bleed) ---------- */
.hero{
  position:relative;
  min-height:56vh;
  display:grid;
  grid-template-columns:minmax(24px,1fr) minmax(auto,560px) minmax(auto,600px);
  align-items:center;
  gap:0;
  background:radial-gradient(120% 120% at 15% 0%,#12232a 0%,var(--bg) 60%);
  overflow:hidden;
}
.hero-copy{grid-column:2/3;padding:clamp(48px,7vw,88px) 40px clamp(48px,7vw,88px) 0;max-width:560px;justify-self:start;text-align:left}
.hero h1{font-size:clamp(2.1rem,5vw,3.3rem);font-weight:800;margin-bottom:20px}
.hero .lead{color:var(--muted);font-size:1.12rem;margin-bottom:28px;max-width:46ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-note{display:flex;flex-wrap:wrap;gap:24px;margin-top:34px;padding-top:24px;border-top:1px solid var(--border-soft)}
.hero-note span{font-size:.92rem;color:var(--muted);display:flex;flex-direction:column;line-height:1.3}
.hero-note b{font-family:var(--ff-head);font-size:1.7rem;color:var(--accent-2);font-weight:700}
.hero-media{grid-column:3/-1;position:relative;align-self:stretch;min-height:56vh}
.hero-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.hero-media::before{content:"";position:absolute;inset:0;z-index:2;background:var(--bg);clip-path:polygon(0 0,22% 0,0 100%)}
.hero-media::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(90deg,rgba(12,20,24,.35),transparent 40%)}

/* ---------- Divider ---------- */
.divider{display:flex;align-items:center;justify-content:center;gap:18px;color:var(--accent);max-width:720px;margin:0 auto;padding-block:clamp(28px,5vw,48px)}
.divider__line{height:1px;flex:1;background:linear-gradient(90deg,transparent,var(--border-soft))}
.divider__line:last-child{background:linear-gradient(90deg,var(--border-soft),transparent)}

/* ---------- Cards / feature grid ---------- */
.grid{display:grid;gap:22px}
.grid--4up{grid-template-columns:repeat(4,1fr)}
.grid--reviews{grid-template-columns:repeat(3,1fr)}
.card{
  background:var(--panel-2);
  border-radius:var(--radius);
  padding:28px 24px;
  box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s ease;
  text-align:center;
}
.card[data-mod="outlined"]{border:var(--bw) solid var(--border);background:rgba(18,35,42,.4)}
.card:hover{transform:translateY(-4px);border-color:var(--accent)}
.card--compact h3{font-size:1.05rem;margin-bottom:10px;font-weight:600}
.card--compact p{color:var(--muted);font-size:.95rem}
.card__ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:48px;height:48px;border-radius:8px;
  background:rgba(45,212,191,.1);border:1px solid var(--border);
  color:var(--accent);margin-bottom:18px;
}

/* ---------- Zigzag ---------- */
.zz{display:flex;flex-direction:column;gap:clamp(28px,5vw,56px)}
.zz__row{display:grid;align-items:center;gap:clamp(24px,4vw,48px)}
.zz__row--photo-wide{grid-template-columns:3fr 2fr}
.zz__row--text-wide{grid-template-columns:2fr 3fr}
.zz__row--text-wide .zz__media{order:2}
.zz__media img{border-radius:var(--radius);aspect-ratio:16/11;object-fit:cover;width:100%;border:1px solid var(--border-soft)}
.zz__text{text-align:left}
.zz__text h3{font-size:clamp(1.35rem,3vw,1.8rem);font-weight:700;margin-bottom:16px;text-transform:uppercase;letter-spacing:.02em}
.zz__text p{color:var(--muted)}

/* ---------- Stats band ---------- */
.stats--band{background:linear-gradient(120deg,#0f2a2b,#0c1a20);border-block:1px solid var(--border)}
.stats__inner{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-block:clamp(40px,6vw,64px);text-align:center}
.stat b{display:block;font-family:var(--ff-head);font-weight:800;font-size:clamp(2.4rem,6vw,3.6rem);color:var(--accent-2);line-height:1}
.stat span{display:block;color:var(--muted);font-size:.9rem;margin-top:10px;max-width:22ch;margin-inline:auto}

/* ---------- Timeline ---------- */
.tl ol{list-style:none;margin:0;padding:0;max-width:760px;margin-inline:auto;position:relative}
.tl ol::before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:var(--border)}
.tl li{position:relative;padding:0 0 clamp(28px,4vw,40px) 44px;text-align:left}
.tl li:last-child{padding-bottom:0}
.tl li::before{content:"";position:absolute;left:2px;top:5px;width:18px;height:18px;border-radius:50%;background:var(--bg);border:2px solid var(--accent)}
.tl__tag{display:inline-block;font-family:var(--ff-head);font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.16em;color:var(--accent-2);margin-bottom:8px}
.tl li h3{font-size:1.25rem;font-weight:700;margin-bottom:8px}
.tl li p{color:var(--muted)}

/* ---------- Gallery thumb strip ---------- */
.gallery--thumbs{display:grid;grid-template-columns:1fr;gap:16px;max-width:960px;margin-inline:auto}
.gallery__main{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border-soft)}
.gallery__img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:opacity .3s ease}
.gallery__img.is-fading{opacity:0}
.gallery__thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.thumb{padding:0;border:2px solid transparent;border-radius:var(--radius);overflow:hidden;cursor:pointer;background:none;transition:border-color .2s ease}
.thumb img{aspect-ratio:1/1;object-fit:cover;width:100%;opacity:.7;transition:opacity .2s}
.thumb:hover img{opacity:1}
.thumb.is-active{border-color:var(--accent)}
.thumb.is-active img{opacity:1}
.thumb:focus-visible{outline:2px solid var(--accent-2);outline-offset:2px}

/* ---------- Checklist ---------- */
.checklist{list-style:none;margin:0 auto;padding:0;max-width:640px;display:grid;gap:12px}
.checklist li{
  position:relative;padding:16px 18px 16px 52px;text-align:left;
  background:rgba(18,35,42,.4);border:var(--bw) solid var(--border);border-radius:var(--radius);
  font-weight:500;
}
.checklist li::before{
  content:"";position:absolute;left:16px;top:50%;transform:translateY(-50%);
  width:22px;height:22px;border-radius:6px;border:2px solid var(--accent);
  background:
    linear-gradient(45deg,transparent 45%,var(--accent) 45%,var(--accent) 55%,transparent 55%) center/0 0 no-repeat;
}
.checklist li::after{
  content:"";position:absolute;left:22px;top:calc(50% - 5px);width:6px;height:11px;
  border:solid var(--accent);border-width:0 2px 2px 0;transform:rotate(45deg);
}

/* ---------- Testimonial big quote ---------- */
.tm{padding-block:clamp(56px,9vw,96px)}
.tm blockquote{
  position:relative;max-width:760px;margin:0 auto;text-align:center;
  font-family:var(--ff-head);font-weight:500;font-size:clamp(1.3rem,3.2vw,2rem);
  line-height:1.4;padding-top:40px;
}
.tm blockquote::before{
  content:"\201C";position:absolute;top:-24px;left:50%;transform:translateX(-50%);
  font-family:var(--ff-head);font-size:6rem;line-height:1;color:var(--accent);opacity:.22;
}
.tm blockquote footer{margin-top:28px;font-family:var(--ff-body);font-size:1rem;display:flex;flex-direction:column;gap:2px}
.tm__name{font-weight:700;color:var(--accent)}
.tm__role{color:var(--muted);font-size:.9rem}

/* ---------- Reviews ---------- */
.review{text-align:left;display:flex;flex-direction:column;gap:18px}
.review p{color:var(--text);font-size:1.02rem}
.review__by{display:flex;flex-direction:column}
.review__by b{font-family:var(--ff-head);font-weight:600}
.review__by span{color:var(--muted);font-size:.85rem}

/* ---------- Pricing time-blocks ---------- */
.pricing--blocks{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.pricing--blocks .block{
  display:flex;flex-direction:column;gap:14px;
  padding:32px 26px;border-radius:var(--radius);text-align:left;
  background:var(--panel-2);border:var(--bw) solid var(--border);
}
.block--featured{border-color:var(--accent);box-shadow:var(--shadow-lift);position:relative}
.block__tag{font-family:var(--ff-head);font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.16em;color:var(--accent-2)}
.block--featured .block__tag{color:var(--accent)}
.block__price{display:flex;align-items:baseline;gap:4px}
.block__price b{font-family:var(--ff-head);font-size:2rem;font-weight:800}
.block__price span{color:var(--muted)}
.block__note{color:var(--muted);font-size:.92rem}
.block ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;flex:1}
.block ul li{position:relative;padding-left:26px;font-size:.94rem;color:var(--text)}
.block ul li::before{content:"";position:absolute;left:0;top:7px;width:8px;height:8px;border-radius:2px;background:var(--accent)}
.block .btn{margin-top:8px}
.pricing__foot{text-align:center;color:var(--muted);font-size:.88rem;margin-top:28px;max-width:640px;margin-inline:auto}

/* ---------- FAQ ---------- */
.faq dl{margin:0;display:grid;gap:20px}
.faq dt{font-family:var(--ff-head);font-weight:600;font-size:1.08rem;margin-bottom:8px}
.faq dd{margin:0;color:var(--muted);padding-bottom:20px;border-bottom:1px solid var(--border-soft)}
.faq dl>div:last-child dd,.faq dd:last-of-type{border-bottom:none}

/* ---------- CTA form band ---------- */
.cta-form{padding-block:clamp(56px,8vw,88px)}
.cta-form__inner{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,56px);align-items:start}
.cta-form__copy{text-align:left}
.cta-form__copy .section__title{text-align:left}
.cta-form__copy p{color:var(--muted);margin-top:16px}
.cta-form__form{background:var(--panel-2);border:var(--bw) solid var(--border);border-radius:var(--radius);padding:clamp(24px,3vw,36px);display:grid;gap:16px}
.field{display:flex;flex-direction:column;gap:6px;text-align:left}
.field label{font-size:.82rem;font-weight:600;color:var(--muted);letter-spacing:.02em}
.field input,.field select{
  padding:13px 15px;border-radius:var(--radius);
  background:var(--bg);border:1px solid var(--border-soft);color:var(--text);
  font-family:var(--ff-body);font-size:1rem;
}
.field input::placeholder{color:#5f7573}
.field input:focus,.field select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(45,212,191,.15)}
.cta-form__fine{font-size:.8rem;color:var(--muted);text-align:center}
.cta-form__fine a{color:var(--accent)}
#formStatus{text-align:center;font-size:.92rem;margin:0}
#formStatus.error{color:#ff9d8a}
#formStatus.success{color:var(--accent)}
.hp-field{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* ---------- Footer ---------- */
.footer{background:var(--bg-2);border-top:1px solid var(--border);padding-block:clamp(40px,6vw,64px)}
.footer__top{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px}
.footer__logo{font-family:var(--ff-head);font-weight:700;font-size:1.15rem;text-decoration:none}
.footer__badges{display:flex;flex-wrap:wrap;gap:10px}
.badge{padding:7px 14px;border-radius:999px;background:rgba(45,212,191,.08);border:1px solid var(--border);color:var(--accent);font-size:.8rem;font-weight:600}
.footer__links{display:flex;flex-wrap:wrap;gap:22px;margin-top:28px;padding-top:24px;border-top:1px solid var(--border-soft)}
.footer__links a{color:var(--muted);text-decoration:none;font-size:.9rem;transition:color .2s}
.footer__links a:hover{color:var(--accent)}
.footer__legal{color:var(--muted);font-size:.82rem;margin-top:24px;max-width:70ch;line-height:1.6}
.footer__copy{color:var(--muted);font-size:.82rem;margin-top:14px}

/* ---------- Reveal (scale-in) ---------- */
[data-reveal]{opacity:0;transform:scale(.96) translateY(14px);transition:opacity .5s ease,transform .5s ease}
[data-reveal].is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1;transform:none;transition:none}
  .btn,.card,.nav__links a::after,.gallery__img{transition:none}
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:1024px){
  .grid--4up{grid-template-columns:repeat(2,1fr)}
  .stats__inner{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:900px){
  .hero{grid-template-columns:1fr;min-height:auto}
  .hero-copy{grid-column:1;padding:44px 24px 32px;max-width:none;justify-self:stretch}
  .hero-media{grid-column:1;min-height:340px;order:-1}
  .hero-media::before{clip-path:none;display:none}
  .hero-media::after{background:linear-gradient(0deg,rgba(12,20,24,.6),transparent 55%)}
  .pricing--blocks{grid-template-columns:1fr;max-width:460px;margin-inline:auto}
  .grid--reviews{grid-template-columns:1fr;max-width:500px;margin-inline:auto}
  .cta-form__inner{grid-template-columns:1fr}
  .cta-form__copy .section__title,.cta-form__copy{text-align:center}
}
@media (max-width:768px){
  .nav__links{display:none}
  .zz__row,.zz__row--photo-wide,.zz__row--text-wide{grid-template-columns:1fr}
  .zz__row--text-wide .zz__media{order:0}
  .gallery__thumbs{grid-template-columns:repeat(4,1fr)}
}
@media (max-width:520px){
  body{font-size:16px}
  .grid--4up{grid-template-columns:1fr;max-width:400px;margin-inline:auto}
  .stats__inner{grid-template-columns:1fr;gap:28px}
  .hero-note{gap:18px}
  .btn{width:100%}
  .hero-actions{flex-direction:column}
  .footer__top{flex-direction:column;align-items:flex-start}
}