/* ============================================================
   PHUONG ANH DENTAL CLINIC — Private VIP Dentistry in Hanoi
   Design system derived from VIP studio interiors (Studio 1)
   ============================================================ */

:root{
  --ivory:#F7F2EA;
  --pearl:#FBF9F5;
  --marble:#F3EDE3;
  --cream:#EFE6D6;
  --gold:#B08D4F;
  --gold-soft:#C9A96A;
  --gold-pale:#E7D7B8;
  --burgundy:#6E2639;
  --burgundy-deep:#571C2C;
  --green-black:#10201B;
  --ink:#2B2620;
  --ink-soft:#5C5347;
  --line:rgba(176,141,79,.28);
  --shadow:0 18px 50px -18px rgba(43,38,32,.22);
  --radius:14px;
  --serif:'Cormorant Garamond',Georgia,serif;
  --sans:'Jost','Segoe UI',system-ui,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);color:var(--ink);background:var(--pearl);
  line-height:1.65;font-size:16.5px;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--burgundy);text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.15;color:var(--ink)}
h1{font-size:clamp(2.4rem,6vw,4.2rem);letter-spacing:.01em}
h2{font-size:clamp(1.9rem,4vw,2.9rem)}
h3{font-size:clamp(1.3rem,2.6vw,1.7rem)}
p{color:var(--ink-soft)}

.wrap{max-width:1180px;margin:0 auto;padding:0 clamp(18px,4vw,44px)}
.narrow{max-width:820px}

/* ---------- header ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:60;
  background:rgba(251,249,245,.86);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s;
}
.site-header.scrolled{box-shadow:0 8px 30px -18px rgba(43,38,32,.35)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:44px;height:44px;border-radius:50%}
.brand-name{font-family:var(--serif);font-size:1.18rem;letter-spacing:.06em;color:var(--ink);text-transform:uppercase}
.brand-name small{display:block;font-family:var(--sans);font-size:.6rem;letter-spacing:.34em;color:var(--gold);text-transform:uppercase}
.nav-links{display:flex;gap:20px;align-items:center;list-style:none}
.nav-links a{color:var(--ink-soft);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;transition:color .25s;white-space:nowrap}
.nav-links a:hover,.nav-links a.active{color:var(--burgundy)}
.nav-cta{background:var(--burgundy);color:#fff!important;padding:10px 20px;border-radius:999px;box-shadow:0 10px 24px -12px rgba(110,38,57,.55);transition:transform .25s,box-shadow .25s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 16px 30px -12px rgba(110,38,57,.65)}
.nav-toggle{display:none;background:none;border:none;font-size:1.6rem;color:var(--ink);cursor:pointer}

.nav-more{position:relative}
.nav-more>a::after{content:" ▾";font-size:.7em}
.dropdown{position:absolute;top:100%;right:0;margin-top:14px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:10px 0;min-width:230px;display:none}
.dropdown::before{content:"";position:absolute;top:-22px;left:-20px;right:-20px;height:24px}
.nav-more:hover .dropdown,.nav-more:focus-within .dropdown{display:block}
.dropdown a{display:block;padding:9px 20px;text-transform:none;letter-spacing:.02em;font-size:.92rem}
.dropdown a:hover{background:var(--ivory)}

/* ---------- hero ---------- */
.hero{
  position:relative;min-height:92vh;display:flex;align-items:center;
  background:var(--green-black);color:#fff;padding:140px 0 90px;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url('../images/studio-1-hero.jpg') center/cover;
  filter:blur(3.5px) brightness(.85);transform:scale(1.06);
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(16,32,27,.62) 0%,rgba(16,32,27,.42) 45%,rgba(16,32,27,.22) 100%);
}
.hero h1{color:#fff;max-width:14ch}
.hero .kicker{color:var(--gold-pale)}
.hero p.lead{color:rgba(255,255,255,.88);max-width:52ch;font-size:1.12rem;margin:22px 0 34px}
.hero-inner{position:relative;z-index:3}

.kicker{
  display:inline-block;font-size:.72rem;letter-spacing:.42em;text-transform:uppercase;
  color:var(--gold);margin-bottom:18px;
}
.kicker::before{content:"";display:inline-block;width:34px;height:1px;background:currentColor;vertical-align:middle;margin-right:14px;opacity:.8}

.btn{display:inline-block;padding:15px 34px;border-radius:999px;font-size:.9rem;letter-spacing:.12em;text-transform:uppercase;transition:transform .25s,box-shadow .25s,background .25s;cursor:pointer;border:none;font-family:var(--sans)}
.btn-gold{background:linear-gradient(135deg,var(--gold-soft),var(--gold));color:#fff;box-shadow:0 14px 34px -14px rgba(176,141,79,.7)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 20px 40px -14px rgba(176,141,79,.85)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55);margin-left:14px}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-burgundy{background:var(--burgundy);color:#fff}
.btn-burgundy:hover{background:var(--burgundy-deep);transform:translateY(-2px)}

/* ---------- sections ---------- */
section{padding:clamp(64px,9vw,110px) 0}
.section-alt{background:var(--ivory)}
.section-dark{background:var(--green-black);color:#fff}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark p{color:rgba(255,255,255,.78)}
.center{text-align:center}
.center .kicker::before{margin:0 14px 0 0}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,70px);align-items:center}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 30px;box-shadow:0 10px 34px -22px rgba(43,38,32,.25);
  transition:transform .3s,box-shadow .3s;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.card h3{margin-bottom:10px}
.card .num{font-family:var(--serif);font-size:2rem;color:var(--gold);line-height:1}

.framed-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);position:relative}
.framed-img::after{content:"";position:absolute;inset:14px;border:1px solid rgba(255,255,255,.55);border-radius:8px;pointer-events:none}
.framed-img img{width:100%;height:100%;object-fit:cover}

.gold-rule{width:64px;height:2px;background:linear-gradient(90deg,var(--gold-soft),transparent);margin:20px 0 26px}
.center .gold-rule{margin:20px auto 26px;background:linear-gradient(90deg,transparent,var(--gold-soft),transparent)}

/* ---------- journey timeline ---------- */
.journey{position:relative;margin-top:50px}
.journey::before{content:"";position:absolute;left:26px;top:0;bottom:0;width:1px;background:linear-gradient(var(--gold-pale),var(--gold),var(--gold-pale))}
.j-step{position:relative;padding:0 0 38px 76px}
.j-step:last-child{padding-bottom:0}
.j-dot{
  position:absolute;left:8px;top:2px;width:37px;height:37px;border-radius:50%;
  background:#fff;border:1px solid var(--gold);color:var(--gold);
  display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:1.05rem;
  box-shadow:0 6px 18px -8px rgba(176,141,79,.6);
}
.j-step h3{font-size:1.22rem;margin-bottom:6px}
.j-step p{font-size:.98rem}

/* ---------- pricing placeholder ---------- */
.price-note{
  background:linear-gradient(135deg,#fff,var(--ivory));
  border:1px solid var(--line);border-left:4px solid var(--gold);
  border-radius:var(--radius);padding:26px 30px;margin:34px 0;
  font-family:var(--serif);font-size:1.15rem;color:var(--ink);
}

/* ---------- treatments ---------- */
.treatment-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;margin-top:44px}
.t-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;transition:transform .3s,border-color .3s}
.t-item:hover{transform:translateY(-4px);border-color:var(--gold)}
.t-item h3{font-size:1.15rem}
.t-item p{font-size:.9rem;margin-top:6px}

/* ---------- credentials ---------- */
.cred{display:flex;gap:18px;align-items:flex-start;padding:22px 0;border-bottom:1px solid var(--line)}
.cred:last-child{border-bottom:none}
.cred .badge{flex:0 0 46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--gold-soft),var(--gold));display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--serif);font-size:1.2rem}
.cred h3{font-size:1.12rem}
.cred p{font-size:.94rem}

/* ---------- faq ---------- */
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:22px 40px 22px 0;font-family:var(--serif);font-size:1.2rem;color:var(--ink);cursor:pointer;position:relative}
.faq-q::after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);font-size:1.5rem;color:var(--gold);transition:transform .3s}
.faq-item.open .faq-q::after{transform:translateY(-50%) rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a p{padding:0 0 22px;font-size:.98rem}

/* ---------- forms ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(26px,4vw,46px);box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft)}
.field input,.field select,.field textarea{
  padding:13px 16px;border:1px solid var(--line);border-radius:10px;background:var(--pearl);
  font-family:var(--sans);font-size:1rem;color:var(--ink);transition:border-color .25s,box-shadow .25s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(176,141,79,.15)}
.triage{background:var(--ivory);border:1px solid var(--line);border-left:4px solid var(--burgundy);border-radius:var(--radius);padding:24px 26px;margin-bottom:26px}
.triage h3{color:var(--burgundy);font-size:1.15rem;margin-bottom:8px}
.radio-row{display:flex;gap:22px;margin-top:12px}
.radio-row label{display:flex;align-items:center;gap:8px;font-size:1rem;color:var(--ink)}
.form-note{font-size:.85rem;color:var(--ink-soft);margin-top:16px}
.alert{padding:16px 20px;border-radius:10px;margin-top:18px;font-size:.95rem;display:none}
.alert.ok{background:#eef7ee;border:1px solid #bcd9bc;color:#2c5e2c;display:block}
.alert.err{background:#fbeeee;border:1px solid #e3bcbc;color:#7c2b2b;display:block}
.alert.warn{background:#fdf6ea;border:1px solid var(--gold-pale);color:#6b5326;display:block}

/* ---------- page hero (inner pages) ---------- */
.page-hero{
  padding:150px 0 70px;background:
  linear-gradient(rgba(251,249,245,.2),var(--pearl)),
  linear-gradient(100deg,var(--cream),var(--pearl) 70%);
  border-bottom:1px solid var(--line);
}
.page-hero h1{font-size:clamp(2.1rem,4.6vw,3.3rem)}
.page-hero p{max-width:62ch;margin-top:16px}

/* ---------- footer ---------- */
.site-footer{background:var(--green-black);color:rgba(255,255,255,.75);padding:70px 0 30px;font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:44px}
.site-footer h4{color:#fff;font-size:1.05rem;letter-spacing:.06em;margin-bottom:14px}
.site-footer a{color:rgba(255,255,255,.75);display:block;padding:4px 0;transition:color .25s}
.site-footer a:hover{color:var(--gold-soft)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-brand img{width:52px;height:52px;border-radius:50%}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.8rem;color:rgba(255,255,255,.5)}

/* ---------- reveal animations ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s ease}
.reveal.visible{opacity:1;transform:none}
.reveal-d1{transition-delay:.12s}.reveal-d2{transition-delay:.24s}.reveal-d3{transition-delay:.36s}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- polish: entrances, hovers, focus ---------- */
@keyframes riseIn{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}
.hero .kicker{animation:riseIn .9s .1s ease both}
.hero h1{animation:riseIn .9s .25s ease both}
.hero p.lead{animation:riseIn .9s .4s ease both}
.hero .btn{animation:riseIn .9s .55s ease both}

.scroll-cue{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  width:26px;height:42px;border:1.5px solid rgba(255,255,255,.6);border-radius:14px;z-index:3;
}
.scroll-cue::after{
  content:"";position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;
  background:var(--gold-soft);border-radius:2px;animation:cueDrop 1.8s infinite ease;
}
@keyframes cueDrop{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(14px)}}
@media (max-width:720px){.scroll-cue{display:none}}

.framed-img{overflow:hidden}
.framed-img img{transition:transform .8s ease}
.framed-img:hover img{transform:scale(1.04)}

main a:not(.btn),section a:not(.btn){border-bottom:1px solid var(--gold-pale);transition:border-color .25s,color .25s}
main a:not(.btn):hover,section a:not(.btn):hover{border-color:var(--gold);color:var(--burgundy-deep)}

:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:4px}

/* journey line draw */
.journey::after{
  content:"";position:absolute;left:26px;top:0;width:1px;height:var(--jprog,0%);
  background:var(--gold);transition:height .25s linear;
}

/* ---------- draft banner (legal) ---------- */
.draft-banner{background:var(--cream);border:1px dashed var(--gold);border-radius:10px;padding:14px 20px;font-size:.85rem;color:var(--ink-soft);margin-bottom:30px}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  .nav-links{
    position:fixed;inset:74px 0 auto 0;background:var(--pearl);flex-direction:column;
    padding:26px 30px 34px;gap:18px;border-bottom:1px solid var(--line);display:none;align-items:flex-start;
    box-shadow:0 24px 40px -24px rgba(43,38,32,.35);
  }
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .dropdown{position:static;display:block;border:none;box-shadow:none;padding:0 0 0 14px;min-width:0;background:transparent}
  .dropdown a{padding:6px 0;color:rgba(43,38,32,.75)}
  .nav-more>a{display:none}
}
@media (max-width:960px){
  .grid-3,.grid-4{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .hero{min-height:78vh;padding-top:120px}
  .btn-ghost{margin-left:0;margin-top:12px}
  .footer-grid{grid-template-columns:1fr}
}