/* =========================================================
   CHỤP ẢNH NGHỆ THUẬT — Landing Page
   Palette: Ink charcoal + Warm gold + Cream
   ========================================================= */

:root{
  --ink:#0d0d10;
  --ink-2:#16161b;
  --ink-3:#1f1f27;
  --cream:#f6f1e9;
  --cream-2:#efe7da;
  --gold:#c9a24b;
  --gold-2:#e3c272;
  --gold-soft:rgba(201,162,75,.14);
  --muted:#9a958c;
  --line:rgba(255,255,255,.10);
  --radius:16px;
  --shadow:0 24px 60px -20px rgba(0,0,0,.55);
  --serif:'Cormorant Garamond',Georgia,serif;
  --sans:'Be Vietnam Pro',system-ui,sans-serif;
  --container:1200px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--ink);
  color:var(--cream);
  line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.text-gold{color:var(--gold-2)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:13px 28px;border-radius:50px;font-weight:600;font-size:.95rem;
  cursor:pointer;border:1px solid transparent;transition:.3s ease;
  letter-spacing:.02em;white-space:nowrap;
}
.btn--gold{background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1408;box-shadow:0 10px 30px -10px rgba(201,162,75,.6)}
.btn--gold:hover{transform:translateY(-3px);box-shadow:0 16px 40px -10px rgba(201,162,75,.75)}
.btn--ghost{background:rgba(255,255,255,.06);border-color:var(--line);color:var(--cream);backdrop-filter:blur(6px)}
.btn--ghost:hover{background:rgba(255,255,255,.14);transform:translateY(-3px)}
.btn--outline{background:transparent;border-color:var(--gold);color:var(--gold-2)}
.btn--outline:hover{background:var(--gold-soft);transform:translateY(-3px)}
.btn--lg{padding:16px 36px;font-size:1.02rem}
.btn--block{width:100%}

/* ---------- Preloader ---------- */
.preloader{position:fixed;inset:0;background:var(--ink);z-index:9999;display:grid;place-items:center;transition:opacity .6s ease,visibility .6s}
.preloader.is-done{opacity:0;visibility:hidden}
.preloader__inner{text-align:center}
.preloader__lens{width:54px;height:54px;border:2px solid var(--line);border-top-color:var(--gold);border-radius:50%;display:block;margin:0 auto 18px;animation:spin .9s linear infinite}
.preloader__text{font-family:var(--serif);letter-spacing:.4em;font-size:.9rem;color:var(--gold-2)}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Header ---------- */
.header{position:fixed;top:0;left:0;right:0;z-index:100;transition:.4s ease;padding:18px 0}
.header.is-scrolled{background:rgba(13,13,16,.85);backdrop-filter:blur(14px);padding:10px 0;border-bottom:1px solid var(--line)}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px}
.brand__mark{font-size:1.7rem;color:var(--gold-2);line-height:1}
.brand__text{display:flex;flex-direction:column;line-height:1}
.brand__text strong{font-size:.95rem;letter-spacing:.18em;font-weight:700}
.brand__text em{font-family:var(--serif);font-style:italic;font-size:1.05rem;color:var(--gold-2)}
.nav{display:flex;align-items:center;gap:30px}
.nav__link{font-size:.92rem;font-weight:500;color:var(--cream);opacity:.85;position:relative;transition:.25s}
.nav__link::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--gold);transition:.3s}
.nav__link:hover{opacity:1}.nav__link:hover::after{width:100%}
.nav__cta{padding:10px 22px}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav__toggle span{width:26px;height:2px;background:var(--cream);transition:.3s}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden}
.hero__slides{position:absolute;inset:0}
.hero__slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transform:scale(1.1);transition:opacity 1.4s ease,transform 7s ease}
.hero__slide.is-active{opacity:1;transform:scale(1)}
.hero__overlay{position:absolute;inset:0;background:linear-gradient(105deg,rgba(13,13,16,.92) 0%,rgba(13,13,16,.7) 45%,rgba(13,13,16,.35) 100%)}
.hero__content{position:relative;z-index:2;padding-top:90px;max-width:760px}
.hero__eyebrow{color:var(--gold-2);letter-spacing:.28em;font-size:.82rem;text-transform:uppercase;margin-bottom:22px;font-weight:500}
.hero__title{font-family:var(--serif);font-weight:600;font-size:clamp(2.6rem,6vw,4.8rem);line-height:1.08;margin-bottom:24px}
.hero__sub{font-size:1.12rem;color:var(--cream-2);max-width:600px;margin-bottom:36px;opacity:.92}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:56px}
.hero__stats{display:flex;gap:44px;flex-wrap:wrap}
.stat__num{font-family:var(--serif);font-size:2.6rem;font-weight:700;color:var(--gold-2);display:block;line-height:1}
.stat__num::after{content:"+";font-size:1.4rem;opacity:.7}
.stat__label{font-size:.85rem;color:var(--muted);letter-spacing:.04em}
.hero__scroll{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:2;font-size:.75rem;letter-spacing:.2em;color:var(--muted);text-align:center}
.hero__scroll span{display:block;width:1px;height:42px;background:linear-gradient(var(--gold),transparent);margin:0 auto 10px;animation:scrollLine 1.8s ease infinite}
@keyframes scrollLine{0%,100%{transform:scaleY(.4);opacity:.4}50%{transform:scaleY(1);opacity:1}}
.hero__dots{position:absolute;bottom:36px;right:40px;z-index:2;display:flex;gap:10px}
.hero__dots button{width:10px;height:10px;border-radius:50%;border:1px solid var(--gold);background:transparent;cursor:pointer;transition:.3s}
.hero__dots button.is-active{background:var(--gold);width:26px;border-radius:6px}

/* ---------- Trust bar ---------- */
.trustbar{background:var(--gold);color:#1a1408;overflow:hidden;padding:14px 0}
.trustbar__track{display:flex;gap:48px;white-space:nowrap;width:max-content;animation:marquee 28s linear infinite;font-weight:600;font-size:.9rem}
.trustbar:hover .trustbar__track{animation-play-state:paused}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ---------- Sections ---------- */
.section{padding:100px 0;position:relative}
.section__head{text-align:center;max-width:680px;margin:0 auto 60px}
.section__eyebrow{color:var(--gold-2);letter-spacing:.24em;text-transform:uppercase;font-size:.8rem;font-weight:600;margin-bottom:14px}
.section__title{font-family:var(--serif);font-size:clamp(2rem,4vw,3.2rem);font-weight:600;line-height:1.15;margin-bottom:18px}
.section__lead{color:var(--muted);font-size:1.05rem}

/* ---------- Services ---------- */
.services{background:linear-gradient(180deg,var(--ink),var(--ink-2))}
.services__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-card{
  background:var(--ink-3);border:1px solid var(--line);border-radius:var(--radius);
  padding:38px 32px;transition:.4s ease;position:relative;overflow:hidden;
}
.service-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--gold),var(--gold-2));transform:scaleX(0);transform-origin:left;transition:.4s}
.service-card:hover{transform:translateY(-8px);border-color:rgba(201,162,75,.4);box-shadow:var(--shadow)}
.service-card:hover::before{transform:scaleX(1)}
.service-card--feature{background:linear-gradient(155deg,#241f17,var(--ink-3));border-color:rgba(201,162,75,.3)}
.service-card__icon{font-size:2.4rem;margin-bottom:20px}
.service-card__title{font-family:var(--serif);font-size:1.55rem;font-weight:600;margin-bottom:12px}
.service-card__desc{color:var(--muted);font-size:.96rem;margin-bottom:22px}
.service-card__link{color:var(--gold-2);font-weight:600;font-size:.92rem;transition:.3s}
.service-card__link:hover{letter-spacing:.04em}

/* ---------- Portfolio ---------- */
.portfolio{background:var(--ink-2)}
.portfolio__filters{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-bottom:40px}
.filter{background:transparent;border:1px solid var(--line);color:var(--cream);padding:9px 22px;border-radius:50px;cursor:pointer;font-family:var(--sans);font-size:.88rem;font-weight:500;transition:.3s}
.filter:hover{border-color:var(--gold)}
.filter.is-active{background:var(--gold);color:#1a1408;border-color:var(--gold)}
.portfolio__grid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:230px;gap:16px}
.folio{position:relative;border-radius:14px;overflow:hidden;background-size:cover;background-position:center;cursor:pointer;transition:.5s ease}
.folio::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 45%,rgba(13,13,16,.85));opacity:.5;transition:.4s}
.folio:hover{transform:scale(.98)}
.folio:hover::after{opacity:.85}
.folio--tall{grid-row:span 2}
.folio--wide{grid-column:span 2}
.folio__tag{position:absolute;left:16px;bottom:16px;z-index:2;font-size:.82rem;font-weight:600;letter-spacing:.04em;padding:6px 14px;background:rgba(201,162,75,.92);color:#1a1408;border-radius:50px;transform:translateY(8px);opacity:0;transition:.4s}
.folio:hover .folio__tag{transform:translateY(0);opacity:1}
.folio.is-hidden{display:none}

/* ---------- Process ---------- */
.process{background:linear-gradient(180deg,var(--ink-2),var(--ink))}
.process__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{padding:34px 26px;border:1px solid var(--line);border-radius:var(--radius);background:var(--ink-3);position:relative;transition:.4s}
.step:hover{transform:translateY(-6px);border-color:rgba(201,162,75,.4)}
.step__num{font-family:var(--serif);font-size:3rem;font-weight:700;color:var(--gold-soft);-webkit-text-stroke:1px var(--gold);display:block;margin-bottom:14px}
.step__title{font-size:1.2rem;font-weight:600;margin-bottom:10px}
.step__desc{color:var(--muted);font-size:.94rem}

/* ---------- Why us ---------- */
.whyus{background:var(--ink)}
.whyus__inner{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;align-items:center}
.whyus__media{position:relative}
.whyus__media img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;height:520px;object-fit:cover}
.whyus__badge{position:absolute;bottom:-24px;right:-24px;background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1408;border-radius:18px;padding:22px 28px;text-align:center;box-shadow:var(--shadow)}
.whyus__badge strong{font-family:var(--serif);font-size:2.6rem;display:block;line-height:1}
.whyus__badge span{font-size:.82rem;font-weight:600}
.whyus__list{margin:28px 0 32px;display:grid;gap:20px}
.whyus__list li{display:flex;gap:16px}
.whyus__list span{color:var(--gold-2);font-size:1.1rem;margin-top:2px}
.whyus__list strong{display:block;font-size:1.08rem;margin-bottom:2px}
.whyus__list p{color:var(--muted);font-size:.94rem}

/* ---------- Pricing ---------- */
.pricing{background:linear-gradient(180deg,var(--ink),var(--ink-2))}
.pricing__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.plan{background:var(--ink-3);border:1px solid var(--line);border-radius:var(--radius);padding:40px 32px;position:relative;transition:.4s}
.plan:hover{transform:translateY(-6px);border-color:rgba(201,162,75,.35)}
.plan--featured{background:linear-gradient(165deg,#241f17,var(--ink-3));border-color:var(--gold);transform:scale(1.04)}
.plan--featured:hover{transform:scale(1.04) translateY(-6px)}
.plan__ribbon{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1408;font-size:.78rem;font-weight:700;padding:6px 18px;border-radius:50px;white-space:nowrap}
.plan__name{font-family:var(--serif);font-size:1.7rem;font-weight:600;margin-bottom:10px}
.plan__price{font-family:var(--serif);font-size:2.6rem;font-weight:700;color:var(--gold-2);line-height:1;margin-bottom:6px}
.plan__price span{font-size:.95rem;color:var(--muted);font-family:var(--sans);font-weight:400;margin-right:6px}
.plan__price small{font-size:1.1rem}
.plan__for{color:var(--muted);font-size:.92rem;margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.plan__features{display:grid;gap:13px;margin-bottom:30px}
.plan__features li{font-size:.94rem;color:var(--cream-2)}
.plan__cta{width:100%}

/* ---------- Testimonials ---------- */
.testimonials{background:var(--ink-2)}
.testi__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testi{background:var(--ink-3);border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;transition:.4s}
.testi:hover{transform:translateY(-6px);border-color:rgba(201,162,75,.3)}
.testi__stars{color:var(--gold-2);letter-spacing:.15em;margin-bottom:16px}
.testi blockquote{font-family:var(--serif);font-size:1.18rem;line-height:1.5;font-style:italic;margin-bottom:24px;color:var(--cream)}
.testi figcaption{display:flex;align-items:center;gap:14px}
.testi figcaption img{width:52px;height:52px;border-radius:50%;border:2px solid var(--gold)}
.testi figcaption span{display:flex;flex-direction:column;font-size:.9rem;color:var(--muted)}
.testi figcaption strong{color:var(--cream);font-size:.98rem}

/* ---------- Booking ---------- */
.booking{background:linear-gradient(180deg,var(--ink-2),var(--ink));position:relative}
.booking::before{content:"";position:absolute;inset:0;background:url('https://images.unsplash.com/photo-1609748106043-0e89cc9f285e?q=80&w=1600&auto=format&fit=crop') center/cover;opacity:.06}
.booking__inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.booking__lead{color:var(--muted);margin-bottom:28px;font-size:1.05rem}
.booking__contacts{display:grid;gap:14px}
.booking__contacts li{display:flex;align-items:center;gap:12px;color:var(--cream-2)}
.booking__contacts a{color:var(--gold-2)}
.booking__form{background:var(--ink-3);border:1px solid var(--line);border-radius:20px;padding:38px;box-shadow:var(--shadow)}
.field{margin-bottom:18px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field label{display:block;font-size:.86rem;font-weight:500;margin-bottom:8px;color:var(--cream-2)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 16px;background:var(--ink-2);border:1px solid var(--line);
  border-radius:10px;color:var(--cream);font-family:var(--sans);font-size:.95rem;transition:.3s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px var(--gold-soft)}
.field input::placeholder,.field textarea::placeholder{color:#5e5a52}
.field textarea{resize:vertical}
.booking__note{text-align:center;font-size:.9rem;margin-top:14px;min-height:20px}
.booking__note.ok{color:var(--gold-2)}
.booking__note.err{color:#e08a8a}

/* ---------- Footer ---------- */
.footer{background:var(--ink);border-top:1px solid var(--line);padding-top:70px}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:50px}
.footer__brand p{color:var(--muted);font-size:.94rem;margin:18px 0 22px;max-width:320px}
.footer__social{display:flex;gap:12px}
.footer__social a{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;transition:.3s;font-size:.95rem}
.footer__social a:hover{background:var(--gold);color:#1a1408;border-color:var(--gold);transform:translateY(-3px)}
.footer__col h4{font-size:1rem;margin-bottom:18px;color:var(--gold-2);font-weight:600}
.footer__col a,.footer__col p{display:block;color:var(--muted);font-size:.92rem;margin-bottom:10px;transition:.3s}
.footer__col a:hover{color:var(--gold-2);padding-left:4px}
.footer__bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-top:24px;padding-bottom:24px;border-top:1px solid var(--line);color:var(--muted);font-size:.86rem}

/* ---------- Floating buttons ---------- */
.fab{position:fixed;right:24px;width:52px;height:52px;border-radius:50%;display:grid;place-items:center;font-size:1.3rem;cursor:pointer;border:0;z-index:90;box-shadow:0 10px 26px -8px rgba(0,0,0,.6);transition:.3s}
.fab--call{bottom:24px;background:linear-gradient(135deg,#2bb673,#1f9d63);color:#fff;animation:pulse 2s infinite}
.fab--zalo{bottom:86px;background:linear-gradient(135deg,#0068ff,#0a84ff);color:#fff}
.fab--book{bottom:148px;background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1408}
.fab--top{bottom:210px;background:var(--ink-3);color:var(--cream);border:1px solid var(--line);opacity:0;visibility:hidden}
.fab--top.is-show{opacity:1;visibility:visible}
.fab:hover{transform:translateY(-4px) scale(1.05)}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(43,182,115,.5)}70%{box-shadow:0 0 0 16px rgba(43,182,115,0)}100%{box-shadow:0 0 0 0 rgba(43,182,115,0)}}

/* ---------- Reveal animation ---------- */
[data-reveal]{opacity:0;transform:translateY(34px);transition:opacity .8s ease,transform .8s ease}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .services__grid,.process__grid,.pricing__grid,.testi__grid{grid-template-columns:repeat(2,1fr)}
  .whyus__inner,.booking__inner{grid-template-columns:1fr;gap:40px}
  .whyus__media img{height:420px}
  .footer__grid{grid-template-columns:1fr 1fr}
  .portfolio__grid{grid-template-columns:repeat(2,1fr);grid-auto-rows:200px}
  .plan--featured{transform:none}.plan--featured:hover{transform:translateY(-6px)}
}
@media(max-width:720px){
  .nav{position:fixed;inset:0 0 0 auto;width:78%;max-width:320px;flex-direction:column;justify-content:center;align-items:flex-start;gap:24px;background:var(--ink-2);padding:40px;transform:translateX(100%);transition:.4s ease;border-left:1px solid var(--line)}
  .nav.is-open{transform:translateX(0)}
  .nav__toggle{display:flex;z-index:101}
  .nav__toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav__toggle.is-open span:nth-child(2){opacity:0}
  .nav__toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .section{padding:70px 0}
  .hero__stats{gap:28px}
  .stat__num{font-size:2rem}
  .hero__dots{display:none}
  .services__grid,.process__grid,.pricing__grid,.testi__grid,.footer__grid{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .booking__form{padding:26px}
  .footer__bottom{flex-direction:column;text-align:center}
}