/* ================================================================
   Đĩa Rau Xanh — blog ăn uống thực vật lành mạnh
   LAYOUT SCHEME: single-column stacked sections, max-width 1120px
   container centered; hero = tall ~85vh stacked device mockup;
   cards 4-in-row (auto-collapse 2 → 1 on mobile); split-photo
   sections alternate photo side (this build: photo RIGHT); all
   section headings centered with soft text-shadow. Spacing scale
   8/16/24/40/64/96/120. Radius scale 14/24/32. Theme: DARK botanical.
   Modifier: editorial (serif display, generous leading, thin rules).
   Accents (max 2): chartreuse #a7d129, ochre #d9a441.
   ================================================================ */

:root{
  --bg:#0f2417;
  --bg-2:#10261a;
  --panel:#14301f;
  --panel-2:#173726;
  --line:rgba(244,239,226,.14);
  --line-strong:rgba(244,239,226,.24);
  --text:#f4efe2;
  --muted:#b8c6b0;
  --accent:#a7d129;      /* chartreuse/lime */
  --accent-2:#d9a441;    /* warm ochre */
  --accent-ink:#0f2417;
  --grad:linear-gradient(135deg,var(--accent),var(--accent-2));

  --r-sm:14px;
  --r:24px;
  --r-lg:32px;

  --s1:8px; --s2:16px; --s3:24px; --s4:40px; --s5:64px; --s6:96px; --s7:120px;

  --maxw:1120px;
  --ff-head:"Marcellus",Georgia,serif;
  --ff-body:"Jost",system-ui,-apple-system,"Segoe UI",sans-serif;
  --shadow-soft:0 2px 20px rgba(0,0,0,.35);
}

*,*::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);
  font-weight:400;
  font-size:17px;
  line-height:1.7;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}

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

h1,h2,h3,h4{font-family:var(--ff-head);font-weight:400;line-height:1.15;margin:0}
p{margin:0}
a{color:inherit}

.shadow-soft{text-shadow:0 2px 14px rgba(0,0,0,.45)}

.tnum{font-variant-numeric:tabular-nums}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--accent);color:var(--accent-ink);padding:12px 18px;border-radius:0 0 var(--r-sm) 0;
  font-weight:600;text-decoration:none;
}
.skip-link:focus{left:0}

.eyebrow{
  display:inline-block;
  font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin-bottom:var(--s2);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--ff-body);font-weight:600;font-size:.98rem;
  padding:13px 26px;border:1px solid transparent;cursor:pointer;
  text-decoration:none;transition:transform .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
  line-height:1;
}
.btn--pill{border-radius:999px}
.btn--accent{background:var(--grad);color:var(--accent-ink)}
.btn--accent:hover{transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--line-strong)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn:focus-visible,a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--accent);outline-offset:3px;
}

/* ---------- section shell ---------- */
.section{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:var(--s7) var(--s3);
}
.section__head{text-align:center;max-width:680px;margin:0 auto var(--s5)}
.section__head h2{font-size:clamp(1.9rem,4vw,2.9rem)}
.section__sub{color:var(--muted);margin-top:var(--s2)}

/* ================= HEADER ================= */
.nav{position:sticky;top:0;z-index:100}
.nav__info{
  background:var(--bg-2);
  border-bottom:1px solid var(--line);
  font-size:.82rem;color:var(--muted);
  display:flex;gap:14px;justify-content:center;align-items:center;flex-wrap:wrap;
  padding:8px var(--s3);
  transition:margin-top .3s ease,opacity .3s ease;
}
.nav__info-sep{color:var(--accent)}
.nav--scrolled .nav__info{margin-top:-42px;opacity:0}
.nav__main{
  background:rgba(15,36,23,.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:var(--s3);
  padding:14px var(--s3);
  max-width:var(--maxw);margin-inline:auto;
}
.nav__logo{
  font-family:var(--ff-head);font-size:1.35rem;text-decoration:none;color:var(--text);
  letter-spacing:.01em;margin-right:auto;
}
.nav__links{display:flex;gap:var(--s3);align-items:center}
.nav__links a{
  text-decoration:none;color:var(--muted);font-size:.95rem;position:relative;padding:4px 0;
  transition:color .2s ease;
}
.nav__links a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--accent);
  transition:width .25s ease;
}
.nav__links a:hover{color:var(--text)}
.nav__links a:hover::after{width:100%}
.nav__cta{padding:10px 20px;font-size:.9rem}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s ease,opacity .25s ease}

/* ================= HERO ================= */
.hero{
  position:relative;overflow:hidden;
  min-height:85vh;display:flex;align-items:center;
  padding:var(--s6) var(--s3) var(--s7);
  background:radial-gradient(1200px 600px at 50% -10%,rgba(167,209,41,.12),transparent 60%),var(--bg);
}
.hero__grid-anim{
  position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(244,239,226,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(244,239,226,.06) 1px,transparent 1px);
  background-size:44px 44px;
  animation:gridShift 26s linear infinite;
  -webkit-mask-image:radial-gradient(circle at 50% 40%,#000 30%,transparent 78%);
          mask-image:radial-gradient(circle at 50% 40%,#000 30%,transparent 78%);
}
@keyframes gridShift{from{background-position:0 0,0 0}to{background-position:44px 44px,44px 44px}}
@media (prefers-reduced-motion:reduce){.hero__grid-anim{animation:none}}

.hero__inner{
  position:relative;z-index:1;max-width:var(--maxw);margin-inline:auto;text-align:center;width:100%;
}
.hero__inner h1{font-size:clamp(2.4rem,6vw,4.2rem);margin-bottom:var(--s3)}
.hero__inner h1 em{font-style:italic;color:var(--accent)}
.hero__lead{max-width:640px;margin:0 auto var(--s4);color:var(--muted);font-size:1.12rem}
.hero__cta{display:flex;gap:var(--s2);justify-content:center;flex-wrap:wrap;margin-bottom:var(--s6)}

.hero__mockup{position:relative;display:flex;justify-content:center;align-items:flex-end}
.device{background:var(--panel);border:1px solid var(--line-strong);box-shadow:0 30px 70px rgba(0,0,0,.5)}
.device--tablet{
  width:min(680px,92%);border-radius:var(--r-lg);padding:12px;
}
.device--tablet img{border-radius:20px;aspect-ratio:16/10;object-fit:cover;width:100%}
.device--phone{
  position:absolute;right:max(2%,calc(50% - 360px));bottom:-28px;
  width:150px;border-radius:26px;padding:8px;
}
.device--phone img{border-radius:20px;aspect-ratio:9/13;object-fit:cover;width:100%}

/* ================= DIVIDER ================= */
.divider--zigzag{line-height:0}
.divider--zigzag svg{display:block;width:100%;height:56px}
.divider--zigzag path{fill:var(--panel)}

/* ================= STATS ================= */
.stats{background:var(--panel);padding:var(--s6) var(--s3)}
.stats__wrap{
  max-width:var(--maxw);margin-inline:auto;
  display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s3);text-align:center;
}
.stat b{display:block;font-family:var(--ff-head);font-size:clamp(2.2rem,4vw,3rem);color:var(--accent);line-height:1}
.stat span{color:var(--muted);font-size:.95rem;margin-top:8px;display:block}

/* ================= CARDS (articles) ================= */
.cards--4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s3)}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:var(--s4) var(--s3);display:flex;flex-direction:column;text-align:center;
  transition:transform .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-6px);border-color:var(--accent)}
.card__tag{
  align-self:center;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--accent-2);border:1px solid var(--line-strong);border-radius:999px;padding:4px 12px;margin-bottom:var(--s3);
}
.card h3{font-size:1.28rem;margin-bottom:var(--s2)}
.card p{color:var(--muted);font-size:.98rem;flex:1}
.card__link{
  margin-top:var(--s3);color:var(--accent);text-decoration:none;font-weight:600;font-size:.95rem;
  transition:gap .2s ease;
}
.card__link:hover{text-decoration:underline}

/* ================= FEATURE SPLIT ================= */
.fgrid__body{display:grid;grid-template-columns:1.05fr .95fr;gap:var(--s5);align-items:center}
.photo-right .fgrid__body{grid-template-columns:.95fr 1.05fr}
.photo-right .fgrid__photo{order:2}
.photo-right .minis{order:1}
.minis{display:grid;grid-template-columns:1fr 1fr;gap:var(--s3)}
.mini{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:var(--s3);
  transition:border-color .25s ease,transform .25s ease;
}
.mini:hover{border-color:var(--accent);transform:translateY(-4px)}
.mini__icon{
  display:inline-flex;width:44px;height:44px;border-radius:12px;align-items:center;justify-content:center;
  background:var(--grad);margin-bottom:var(--s2);
}
.mini__icon svg{fill:none;stroke:var(--accent-ink);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.mini h4{font-size:1.14rem;margin-bottom:6px}
.mini p{color:var(--muted);font-size:.94rem}
.fgrid__photo{margin:0;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-strong)}
.fgrid__photo img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ================= ZIGZAG ================= */
.zigzag__row{display:grid;grid-template-columns:.8fr 1.2fr;gap:var(--s5);align-items:center}
.zigzag__photo-clip{
  border-radius:var(--r-lg);overflow:hidden;
  clip-path:polygon(0 0,100% 0,88% 100%,0 100%);
  border:1px solid var(--line-strong);
}
.zigzag__photo-clip img{width:100%;aspect-ratio:3/4;object-fit:cover}
.zigzag__text h2{font-size:clamp(1.7rem,3.4vw,2.5rem);margin:var(--s2) 0 var(--s3)}
.zigzag__text p{color:var(--muted);margin-bottom:var(--s3)}

/* ================= GALLERY ================= */
.gallery__grid{columns:2;column-gap:var(--s3)}
.gallery__grid figure{margin:0 0 var(--s3);break-inside:avoid}
.gallery__btn{
  display:block;padding:0;border:1px solid var(--line);background:none;cursor:pointer;
  border-radius:var(--r);overflow:hidden;width:100%;transition:border-color .25s ease,transform .25s ease;
}
.gallery__btn:hover{border-color:var(--accent);transform:translateY(-4px)}
.gallery__btn img{width:100%;display:block}
.lightbox{
  border:0;padding:0;background:transparent;max-width:min(92vw,900px);
}
.lightbox::backdrop{background:rgba(6,15,10,.9)}
.lightbox img{width:100%;height:auto;border-radius:var(--r);border:1px solid var(--line-strong)}
.lightbox__close{
  position:absolute;top:-14px;right:-14px;width:44px;height:44px;border-radius:999px;
  background:var(--accent);color:var(--accent-ink);border:0;font-size:1.6rem;cursor:pointer;line-height:1;
}

/* ================= TIMELINE ================= */
.tl__track{position:relative;max-width:900px;margin-inline:auto}
.tl__track::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;background:var(--line-strong);transform:translateX(-50%);
}
.node{
  position:relative;width:calc(50% - 40px);
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:var(--s3) var(--s4);
  margin-bottom:var(--s4);
}
.node--l{margin-right:auto}
.node--r{margin-left:auto}
.node__dot{
  position:absolute;top:28px;width:16px;height:16px;border-radius:999px;background:var(--grad);
  box-shadow:0 0 0 5px var(--bg);
}
.node--l .node__dot{right:-48px}
.node--r .node__dot{left:-48px}
.node__week{color:var(--accent-2);font-size:.82rem;letter-spacing:.1em;text-transform:uppercase}
.node h3{font-size:1.28rem;margin:6px 0 8px}
.node p{color:var(--muted);font-size:.96rem}

/* ================= TESTIMONIALS ================= */
.tm__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--s3)}
.tm blockquote{
  margin:0;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:var(--s4);
  display:flex;flex-direction:column;gap:var(--s3);
}
.ava{
  display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:999px;
  background:var(--grad);color:var(--accent-ink);font-family:var(--ff-head);font-size:1.3rem;
}
.tm blockquote p{color:var(--text);font-size:1.02rem}
.tm cite{color:var(--muted);font-style:normal;font-size:.9rem}

/* ================= PRICING ================= */
.pricing__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s3);align-items:start}
.price-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:var(--s4);
  text-align:center;position:relative;transition:transform .25s ease,border-color .25s ease;
}
.price-card:hover{transform:translateY(-4px)}
.price-card.is-featured{
  border-color:var(--accent);transform:translateY(-10px);
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
  box-shadow:0 24px 60px rgba(0,0,0,.45);
}
.price-card.is-featured:hover{transform:translateY(-14px)}
.price-card__badge{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:var(--grad);color:var(--accent-ink);font-size:.74rem;font-weight:600;letter-spacing:.06em;
  padding:6px 16px;border-radius:999px;white-space:nowrap;
}
.price-card h3{font-size:1.5rem;margin-bottom:var(--s2)}
.price-card__price{font-family:var(--ff-head);font-size:2.2rem;color:var(--accent);line-height:1}
.price-card__price span{font-size:1.1rem;margin-left:2px}
.price-card__note{color:var(--muted);font-size:.9rem;margin:6px 0 var(--s3)}
.price-card ul{list-style:none;margin:0 0 var(--s4);padding:0;text-align:left;display:grid;gap:10px}
.price-card li{position:relative;padding-left:26px;color:var(--muted);font-size:.96rem}
.price-card li::before{
  content:"";position:absolute;left:0;top:8px;width:14px;height:8px;
  border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg);
}
.price-card .btn{width:100%}

/* ================= FAQ ================= */
.faq__wrap{max-width:820px;margin-inline:auto}
.faq__tablist{display:flex;gap:var(--s1);justify-content:center;flex-wrap:wrap;margin-bottom:var(--s4)}
.faq__tab{
  background:transparent;border:1px solid var(--line-strong);color:var(--muted);
  border-radius:999px;padding:10px 22px;cursor:pointer;font-family:var(--ff-body);font-size:.95rem;font-weight:500;
  transition:all .2s ease;
}
.faq__tab.is-active{background:var(--grad);color:var(--accent-ink);border-color:transparent}
.faq__panel{display:grid;gap:var(--s2)}
.faq details{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:0 var(--s3);
}
.faq summary{
  cursor:pointer;list-style:none;padding:var(--s3) 0;font-weight:500;font-size:1.05rem;
  display:flex;justify-content:space-between;align-items:center;gap:var(--s2);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:1.5rem;line-height:1;transition:transform .2s ease}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{color:var(--muted);padding:0 0 var(--s3);font-size:.98rem}

/* ================= CTA / FORM ================= */
.cta__card{
  max-width:960px;margin-inline:auto;background:var(--panel);border:1px solid var(--line-strong);
  border-radius:var(--r-lg);padding:clamp(28px,5vw,56px);
  display:grid;grid-template-columns:1fr 1fr;gap:var(--s5);align-items:start;
}
.cta__intro h2{font-size:clamp(1.7rem,3vw,2.4rem);margin:var(--s2) 0 var(--s3)}
.cta__intro p{color:var(--muted)}
.lead-form__progress{color:var(--accent-2);font-size:.85rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:var(--s3)}
.lead-form fieldset{border:0;padding:0;margin:0}
.lead-form legend{font-family:var(--ff-head);font-size:1.2rem;margin-bottom:var(--s3)}
.radio-row{display:grid;gap:10px;margin-bottom:var(--s4)}
.radio-pill{
  display:flex;align-items:center;gap:12px;cursor:pointer;
  border:1px solid var(--line-strong);border-radius:999px;padding:12px 18px;font-size:.98rem;
  transition:border-color .2s ease,background .2s ease;
}
.radio-pill:hover{border-color:var(--accent)}
.radio-pill input{accent-color:var(--accent);width:18px;height:18px}
.radio-pill:has(input:checked){border-color:var(--accent);background:rgba(167,209,41,.08)}
.field{display:block;margin-bottom:var(--s3)}
.field span{display:block;font-size:.9rem;color:var(--muted);margin-bottom:6px}
.field input{
  width:100%;background:var(--bg-2);border:1px solid var(--line-strong);border-radius:var(--r-sm);
  padding:13px 16px;color:var(--text);font-family:var(--ff-body);font-size:1rem;
}
.field input::placeholder{color:rgba(184,198,176,.55)}
.field input:focus{border-color:var(--accent);outline:none}
.lead-form__actions{display:flex;gap:var(--s2);flex-wrap:wrap}
.lead-form__status{margin-top:var(--s3);min-height:1.2em}
.lead-form__status.error{color:#ff9b8a}
.lead-form__status.ok{color:var(--accent)}
.lead-form__fine{margin-top:var(--s3);font-size:.82rem;color:var(--muted)}
.lead-form__fine a{color:var(--accent)}
.hp-field{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* ================= FOOTER ================= */
.footer--minimal{
  text-align:center;padding:var(--s6) var(--s3);border-top:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;gap:var(--s3);background:var(--bg-2);
}
.footer__logo{font-family:var(--ff-head);font-size:1.6rem;text-decoration:none;color:var(--text)}
.footer__tag{color:var(--muted);max-width:520px}
.footer__links{display:flex;gap:var(--s3);flex-wrap:wrap;justify-content:center}
.footer__links a{color:var(--muted);text-decoration:none;font-size:.95rem;transition:color .2s ease}
.footer__links a:hover{color:var(--accent)}
.footer__copy{color:var(--muted);font-size:.85rem;opacity:.8}

/* ================= REVEAL ================= */
/* Hidden only when JS is active (html.js). Without JS content stays visible. */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
}

/* ================= LEGAL PAGES ================= */
.legal{max-width:760px;margin:0 auto;padding:var(--s7) var(--s3)}
.legal h1{font-size:clamp(2rem,4vw,3rem);margin-bottom:var(--s2)}
.legal .legal__updated{color:var(--muted);font-size:.9rem;margin-bottom:var(--s4)}
.legal h2{font-size:1.4rem;margin:var(--s4) 0 var(--s2)}
.legal p,.legal li{color:var(--muted)}
.legal ul{padding-left:20px;display:grid;gap:8px}
.legal a{color:var(--accent)}
.legal-nav{
  max-width:var(--maxw);margin-inline:auto;padding:18px var(--s3);
  display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);
}
.legal-nav a.legal-nav__logo{font-family:var(--ff-head);font-size:1.3rem;text-decoration:none;color:var(--text)}
.legal-nav a.legal-nav__back{color:var(--muted);text-decoration:none;font-size:.95rem}
.legal-nav a.legal-nav__back:hover{color:var(--accent)}

/* ================= THANK YOU ================= */
.thanks{min-height:80vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:var(--s6) var(--s3);gap:var(--s3)}
.thanks h1{font-size:clamp(2rem,5vw,3.2rem)}
.thanks p{color:var(--muted);max-width:520px}
.thanks__mark{width:72px;height:72px;border-radius:999px;background:var(--grad);display:flex;align-items:center;justify-content:center}
.thanks__mark svg{fill:none;stroke:var(--accent-ink);stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}

/* ================= RESPONSIVE ================= */
@media (max-width:1024px){
  .cards--4{grid-template-columns:repeat(2,1fr)}
  .pricing__grid{grid-template-columns:1fr;max-width:460px;margin-inline:auto}
  .price-card.is-featured{transform:none}
  .price-card.is-featured:hover{transform:translateY(-4px)}
}
@media (max-width:900px){
  .nav__toggle{display:flex}
  .nav__links{
    position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;
    background:var(--bg-2);border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .nav__links.is-open{max-height:70vh;padding:8px 0}
  .nav__links a{padding:12px var(--s3);width:100%}
  .nav__links a::after{display:none}
  .nav__cta{display:none}
  .fgrid__body,.zigzag__row{grid-template-columns:1fr;gap:var(--s4)}
  .photo-right .fgrid__photo{order:0}
  .photo-right .minis{order:0}
  .cta__card{grid-template-columns:1fr;gap:var(--s4)}
  .tl__track::before{left:20px}
  .node{width:auto;margin-left:44px !important;margin-right:0 !important}
  .node--l .node__dot,.node--r .node__dot{left:-32px;right:auto}
}
@media (max-width:640px){
  body{font-size:16px}
  .section{padding:var(--s6) var(--s3)}
  .stats__wrap{grid-template-columns:repeat(2,1fr);gap:var(--s4)}
  .cards--4{grid-template-columns:1fr}
  .minis{grid-template-columns:1fr}
  .gallery__grid{columns:1}
  .tm__grid{grid-template-columns:1fr}
  .device--phone{display:none}
  .hero__cta{margin-bottom:var(--s5)}
}