/* ===========================================================
   BIRDY HOME SÀI GÒN — Website mẫu
   Bảng màu chính thức từ Logo Guideline
   =========================================================== */
:root{
  --green:#295946;
  --green-deep:#1d4234;
  --green-soft:#3a6e58;
  --tan:#dabc8b;
  --tan-deep:#c6a570;
  --ink:#231f20;
  --cream:#fafbf9;
  --paper:#f3efe6;
  --paper-2:#ece5d6;
  --gray:#606160;
  --line:rgba(35,31,32,.12);
  --serif:'Cormorant Garamond',Georgia,'Times New Roman',serif;
  --sans:'Be Vietnam Pro',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --shadow:0 18px 50px -20px rgba(29,66,52,.35);
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:var(--sans);color:var(--ink);background:var(--cream);
  line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1200px,92vw);margin-inline:auto}
section{padding:96px 0}
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.1;color:var(--green-deep)}
h2.section-title{font-size:clamp(2.1rem,4.6vw,3.4rem);letter-spacing:.5px;margin-bottom:8px}
.eyebrow{font-size:.98rem;letter-spacing:.28em;text-transform:uppercase;color:var(--tan-deep);font-weight:700;margin-bottom:14px}
.lead{color:var(--gray);font-size:1.08rem;max-width:60ch}
.center{text-align:center}
.center .lead{margin-inline:auto}
.whole-note{display:inline-flex;align-items:center;gap:10px;background:var(--green);color:#fff;
  padding:13px 28px;border-radius:999px;font-weight:700;font-size:.98rem;margin-top:24px;
  letter-spacing:.01em;box-shadow:0 12px 28px -12px rgba(41,89,70,.6)}
.whole-note .ic{font-size:1.1rem}
.whole-note.gold{background:var(--tan);color:var(--green-deep)}

/* ---- Line icons ---- */
[data-icon]{display:inline-flex;align-items:center;justify-content:center;line-height:0}
[data-icon] svg{width:1em;height:1em}
.hl-card .ic{color:var(--tan)}
.am-item .ic{color:var(--green);font-size:1.7rem}
.acc-head .ic{color:var(--green);font-size:1.25rem;margin-right:12px}
.ct-row .ic{color:var(--tan)}
.ex-cat h3 [data-icon]{color:var(--tan-deep);font-size:1.3rem}
.chev[data-icon]{color:var(--tan-deep);font-size:1.25rem}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;border:none;cursor:pointer;
  font-family:var(--sans);font-weight:600;font-size:.95rem;padding:14px 30px;border-radius:999px;
  transition:.25s ease;letter-spacing:.02em}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 10px 24px -10px rgba(41,89,70,.7)}
.btn-primary:hover{background:var(--green-deep);transform:translateY(-2px)}
.btn-gold{background:var(--tan);color:var(--green-deep)}
.btn-gold:hover{background:var(--tan-deep);transform:translateY(-2px)}
.btn-ghost{background:transparent;border:1.5px solid currentColor;color:var(--green-deep)}
.btn-ghost:hover{background:var(--green);color:#fff;border-color:var(--green)}
.btn-lg{padding:17px 40px;font-size:1.05rem}

/* ---------- Header ---------- */
header{position:fixed;inset:0 0 auto 0;z-index:100;transition:.35s ease;
  padding:20px 0;background:transparent}
header.scrolled{background:rgba(250,251,249,.92);backdrop-filter:blur(12px);
  padding:11px 0;box-shadow:0 6px 24px -16px rgba(0,0,0,.4)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--serif);font-size:1.5rem;
  font-weight:700;color:#fff;transition:.35s}
.brand img{height:42px;width:auto;transition:.35s}
header.scrolled .brand{color:var(--green-deep)}
.nav-links{display:flex;gap:30px;list-style:none}
.nav-links a{font-size:.92rem;font-weight:500;color:#fff;position:relative;padding:4px 0;transition:.25s}
header.scrolled .nav-links a{color:var(--ink)}
.nav-links a::after{content:'';position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--tan);transition:.25s}
.nav-links a:hover::after{width:100%}
.nav-right{display:flex;align-items:center;gap:16px}
.lang-switch{display:flex;gap:2px;align-items:center;background:rgba(255,255,255,.16);
  border-radius:999px;padding:4px;backdrop-filter:blur(6px)}
header.scrolled .lang-switch{background:var(--paper)}
.lang-switch button{background:none;border:none;cursor:pointer;color:#fff;font-weight:600;
  font-size:.78rem;padding:5px 9px;border-radius:999px;transition:.2s;font-family:var(--sans)}
header.scrolled .lang-switch button{color:var(--gray)}
.lang-switch button.active{background:var(--green);color:#fff!important}
.hamburger{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:6px}
.hamburger span{width:24px;height:2px;background:#fff;transition:.3s}
header.scrolled .hamburger span{background:var(--green-deep)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;
  text-align:center;color:#fff;padding:120px 0 80px}
.hero-bg{position:absolute;inset:0;z-index:-2;background:url('images/hero-pool-dusk.jpg') center/cover no-repeat}
.hero::after{content:'';position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(29,66,52,.55) 0%,rgba(35,31,32,.35) 45%,rgba(29,66,52,.75) 100%)}
.hero-logo{height:96px;margin:0 auto 26px;filter:drop-shadow(0 6px 18px rgba(0,0,0,.35))}
.hero h1{color:#fff;font-size:clamp(2rem,7vw,5rem);text-shadow:0 4px 24px rgba(0,0,0,.4);max-width:none;white-space:nowrap;margin:0 auto}
.hero .tagline{font-family:var(--serif);font-style:italic;font-size:clamp(1.15rem,2.4vw,1.7rem);
  margin:20px auto 14px;color:var(--tan);max-width:30ch}
.hero p.sub{max-width:54ch;margin:0 auto 34px;font-size:1.05rem;opacity:.95}
.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.scroll-ind{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);color:#fff;opacity:.8;
  font-size:1.4rem;animation:bob 1.8s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(32px);transition:.8s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- Intro / stats ---------- */
.intro{background:var(--cream)}
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center}
.intro-text h2{margin-bottom:18px}
.intro-text p{color:var(--gray);margin-bottom:16px}
.intro-media{position:relative}
.intro-media img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;height:520px;object-fit:cover}
.stats{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.stat{flex:1;min-width:120px;background:var(--paper);border-radius:14px;padding:20px;text-align:center}
.stat .num{font-family:var(--serif);font-size:2.2rem;color:var(--green);font-weight:700;line-height:1}
.stat .lbl{font-size:.82rem;color:var(--gray);margin-top:6px}

/* ---------- Highlights ---------- */
.highlights{background:var(--green-deep);color:#fff}
.highlights h2{color:#fff}
.highlights .eyebrow{color:var(--tan)}
.hl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-top:48px}
.hl-card{background:rgba(255,255,255,.05);border:1px solid rgba(218,188,139,.25);border-radius:var(--radius);
  padding:34px 26px;text-align:center;transition:.3s}
.hl-card:hover{background:rgba(218,188,139,.12);transform:translateY(-6px)}
.hl-card .ic{font-size:2.2rem;margin-bottom:14px}
.hl-card h3{color:var(--tan);font-size:1.45rem;margin-bottom:8px}
.hl-card p{font-size:.92rem;opacity:.85}

/* ---------- Spaces / gallery ---------- */
.spaces{background:var(--paper)}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:220px;gap:16px;margin-top:48px}
.tile{position:relative;overflow:hidden;border-radius:14px;cursor:pointer;box-shadow:var(--shadow)}
.tile img{width:100%;height:100%;object-fit:cover;transition:.6s}
.tile:hover img{transform:scale(1.07)}
.tile .cap{position:absolute;inset:auto 0 0 0;padding:30px 18px 14px;color:#fff;font-weight:600;
  font-size:1rem;background:linear-gradient(transparent,rgba(29,66,52,.85))}
.tile.big{grid-column:span 2;grid-row:span 2}
.tile.wide{grid-column:span 2}

/* ---------- Amenities ---------- */
.amenities{background:var(--cream)}
.am-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:44px}
.am-item{display:flex;gap:14px;align-items:flex-start;background:var(--paper);border-radius:12px;padding:20px 22px}
.am-item .ic{font-size:1.5rem;line-height:1.3}
.am-item h4{font-family:var(--sans);font-weight:700;font-size:1rem;color:var(--green-deep);margin-bottom:3px}
.am-item p{font-size:.86rem;color:var(--gray)}

/* ---------- Booking / calculator ---------- */
.booking{background:var(--green-deep);color:#fff}
.booking h2{color:#fff}
.booking .eyebrow{color:var(--tan)}
.booking .lead{color:rgba(255,255,255,.92)}
.book-wrap{display:grid;grid-template-columns:1.25fr .9fr;gap:34px;margin-top:46px;align-items:start}
.calc{background:var(--cream);color:var(--ink);border-radius:20px;padding:30px;box-shadow:var(--shadow)}
.calc .field{margin-bottom:22px}
.calc label.flabel{display:block;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--gray);font-weight:700;margin-bottom:10px}
.pkg-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.pkg{border:1.5px solid var(--line);border-radius:12px;padding:13px 15px;cursor:pointer;transition:.2s;background:#fff}
.pkg:hover{border-color:var(--tan)}
.pkg.active{border-color:var(--green);background:rgba(41,89,70,.06);box-shadow:0 0 0 1.5px var(--green) inset}
.pkg .t{font-weight:700;color:var(--green-deep);font-size:.98rem}
.pkg .d{font-size:.76rem;color:var(--gray);margin-top:2px}
.daytype{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.seg{display:inline-flex;background:#fff;border:1.5px solid var(--line);border-radius:999px;overflow:hidden}
.seg button{border:none;background:none;padding:10px 18px;cursor:pointer;font-family:var(--sans);
  font-weight:600;font-size:.86rem;color:var(--gray);transition:.2s}
.seg button.active{background:var(--green);color:#fff}
.date-in,.num-in input{font-family:var(--sans);font-size:1rem;border:1.5px solid var(--line);border-radius:10px;
  padding:12px 14px;width:100%;color:var(--ink);background:#fff}
.day-badge{font-size:.8rem;font-weight:700;padding:6px 12px;border-radius:999px;background:var(--paper-2);color:var(--green-deep)}
.num-in{display:flex;align-items:center;gap:10px;max-width:230px}
.num-in button{width:42px;height:42px;border-radius:10px;border:1.5px solid var(--line);background:#fff;
  font-size:1.3rem;cursor:pointer;color:var(--green);font-weight:700;transition:.2s}
.num-in button:hover{background:var(--green);color:#fff;border-color:var(--green)}
.num-in input{text-align:center;font-weight:700}
.hint{font-size:.78rem;color:var(--tan-deep);margin-top:7px;font-weight:600}
.addons{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.addon{display:flex;align-items:center;gap:10px;border:1.5px solid var(--line);border-radius:10px;
  padding:11px 13px;cursor:pointer;background:#fff;transition:.2s;font-size:.88rem}
.addon:hover{border-color:var(--tan)}
.addon input{accent-color:var(--green);width:17px;height:17px;cursor:pointer}
.addon.on{border-color:var(--green);background:rgba(41,89,70,.05)}
.addon .px{margin-left:auto;font-weight:700;color:var(--green-deep);font-size:.82rem;white-space:nowrap}
.hidden{display:none!important}

/* summary */
.summary{background:var(--green);color:#fff;border-radius:20px;padding:30px;position:sticky;top:96px}
.summary h3{color:#fff;font-size:1.6rem;margin-bottom:6px}
.summary .sub{font-size:.85rem;opacity:.8;margin-bottom:20px}
.sum-lines{border-top:1px solid rgba(255,255,255,.2);padding-top:16px;margin-top:4px}
.sum-line{display:flex;justify-content:space-between;gap:12px;font-size:.92rem;padding:7px 0;opacity:.95}
.sum-line.muted{opacity:.65;font-size:.84rem}
.sum-total{display:flex;justify-content:space-between;align-items:baseline;border-top:2px solid var(--tan);
  margin-top:14px;padding-top:16px}
.sum-total .lbl{font-family:var(--serif);font-size:1.5rem}
.sum-total .val{font-family:var(--serif);font-size:2rem;font-weight:700;color:var(--tan)}
.pay-note{background:rgba(0,0,0,.18);border-radius:12px;padding:13px 15px;margin-top:18px;font-size:.82rem;line-height:1.6}
.pay-note b{color:var(--tan)}
.summary .btn{width:100%;justify-content:center;margin-top:18px}
.disclaimer{font-size:.76rem;opacity:.7;text-align:center;margin-top:12px;font-style:italic}

/* ---------- Reviews ---------- */
.reviews{background:var(--paper)}
.rv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:46px}
.rv-card{background:var(--cream);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.rv-stars{color:var(--tan-deep);font-size:1.05rem;letter-spacing:2px;margin-bottom:12px}
.rv-card p{font-style:italic;color:var(--ink);margin-bottom:18px;font-size:.96rem}
.rv-who{display:flex;align-items:center;gap:12px}
.rv-av{width:44px;height:44px;border-radius:50%;background:var(--green);color:#fff;display:flex;
  align-items:center;justify-content:center;font-weight:700;font-family:var(--serif);font-size:1.2rem}
.rv-who .nm{font-weight:700;font-size:.92rem}
.rv-who .src{font-size:.78rem;color:var(--gray)}
.rv-foot{text-align:center;margin-top:36px}

/* ---------- Explore ---------- */
.explore{background:var(--cream)}
.ex-cats{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:46px}
.ex-cat{background:var(--paper);border-radius:var(--radius);padding:30px;border-left:4px solid var(--tan)}
.ex-cat h3{font-family:var(--sans);font-weight:700;font-size:1.15rem;color:var(--green-deep);margin-bottom:18px;
  display:flex;align-items:center;gap:10px}
.ex-place{padding:12px 0;border-bottom:1px dashed var(--line)}
.ex-place:last-child{border-bottom:none}
.ex-place .top{display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.ex-place .nm{font-weight:600}
.ex-place .dist{font-size:.78rem;color:#fff;background:var(--green);padding:3px 10px;border-radius:999px;white-space:nowrap}
.ex-place .ds{font-size:.84rem;color:var(--gray);margin-top:2px}

/* ---------- Policies ---------- */
.policies{background:var(--paper-2)}
.acc{margin-top:42px;max-width:900px;margin-inline:auto}
.acc-item{background:var(--cream);border-radius:12px;margin-bottom:12px;overflow:hidden;box-shadow:0 6px 20px -16px rgba(0,0,0,.5)}
.acc-head{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:20px 24px;cursor:pointer;font-weight:700;color:var(--green-deep)}
.acc-head .ic{margin-right:10px}
.acc-head .chev{transition:.3s;color:var(--tan-deep);font-size:1.2rem}
.acc-item.open .chev{transform:rotate(180deg)}
.acc-body{max-height:0;overflow:hidden;transition:max-height .35s ease;color:var(--gray)}
.acc-body .inner{padding:0 24px 22px;font-size:.92rem}
.acc-body ul{margin-left:18px;margin-top:6px}
.acc-body li{margin-bottom:5px}

/* ---------- Contact ---------- */
.contact{background:var(--green-deep);color:#fff}
.contact h2{color:#fff}
.contact .eyebrow{color:var(--tan)}
.ct-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;margin-top:46px;align-items:stretch}
.ct-info{display:flex;flex-direction:column;gap:18px}
.ct-row{display:flex;gap:15px;align-items:flex-start}
.ct-row .ic{font-size:1.3rem;background:rgba(218,188,139,.15);width:46px;height:46px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;flex-shrink:0}
.ct-row .lbl{font-size:.78rem;opacity:.7;text-transform:uppercase;letter-spacing:.1em}
.ct-row .val{font-weight:600}
.ct-row a.val:hover{color:var(--tan)}
.map-wrap{border-radius:var(--radius);overflow:hidden;min-height:360px;box-shadow:var(--shadow)}
.map-wrap iframe{width:100%;height:100%;min-height:360px;border:0}

/* ---------- Footer ---------- */
footer{background:var(--ink);color:rgba(255,255,255,.75);padding:50px 0 30px;text-align:center}
footer img{height:54px;margin:0 auto 16px}
footer .fnav{display:flex;gap:26px;justify-content:center;flex-wrap:wrap;margin:18px 0;font-size:.9rem}
footer .fnav a:hover{color:var(--tan)}
footer .cr{font-size:.8rem;opacity:.6;margin-top:18px}

/* ---------- Floating contact ---------- */
.fab{position:fixed;right:20px;bottom:22px;z-index:90;display:flex;flex-direction:column;gap:12px}
.fab a{width:54px;height:54px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:.9rem;box-shadow:0 8px 22px -6px rgba(0,0,0,.5);transition:.25s;position:relative}
.fab a:hover{transform:scale(1.1)}
.fab .call{background:var(--green)}
.fab .zalo{background:#0068ff}
.fab .mess{background:#a21caf;background:linear-gradient(135deg,#7b2ff7,#f107a3)}
.fab a svg{width:26px;height:26px;fill:#fff}

/* ---------- Lightbox ---------- */
.lb{position:fixed;inset:0;background:rgba(20,28,24,.94);z-index:200;display:none;align-items:center;justify-content:center;padding:30px}
.lb.show{display:flex}
.lb img{max-width:92vw;max-height:86vh;border-radius:10px;box-shadow:0 20px 60px rgba(0,0,0,.6)}
.lb .x{position:absolute;top:20px;right:28px;color:#fff;font-size:2.4rem;cursor:pointer;line-height:1}
.lb .nav-btn{position:absolute;top:50%;transform:translateY(-50%);color:#fff;font-size:2.6rem;cursor:pointer;
  padding:14px;user-select:none;opacity:.8}
.lb .prev{left:14px}.lb .next{right:14px}

/* ---------- Mobile ---------- */
@media(max-width:1024px){
  .gallery,.hl-grid{grid-template-columns:repeat(2,1fr)}
  .am-grid,.rv-grid{grid-template-columns:repeat(2,1fr)}
  .intro-grid,.book-wrap,.ct-grid,.ex-cats{grid-template-columns:1fr}
  .summary{position:static}
  .intro-media img{height:380px}
}
@media(max-width:680px){
  section{padding:64px 0}
  .nav-links{position:fixed;inset:0 0 0 auto;width:78%;max-width:320px;background:var(--green-deep);
    flex-direction:column;padding:90px 30px;gap:22px;transform:translateX(100%);transition:.35s;z-index:99}
  .nav-links.open{transform:none}
  .nav-links a{color:#fff!important;font-size:1.1rem}
  .hamburger{display:flex;z-index:100}
  .nav-right .btn{display:none}
  .gallery{grid-template-columns:1fr 1fr;grid-auto-rows:150px}
  .tile.big{grid-column:span 2;grid-row:span 2}
  .hl-grid,.am-grid,.rv-grid,.addons,.pkg-grid{grid-template-columns:1fr}
  .hero h1{font-size:clamp(1.55rem,7.4vw,2.5rem)}
  .calc,.summary{padding:22px}
  .brand span{display:none}
}