/* VietSmile — shared stylesheet. Multi-page rebuild. */
:root{
  --green:#15795a; --green-dark:#0f5e46; --green-soft:#e7f3ee;
  --orange:#e8743b; --orange-soft:#fbe9dd;
  --navy:#1e2a38; --ink:#23332e; --muted:#65786f;
  --bg:#f6faf8; --card:#ffffff; --line:#e3ede8;
  --maxw:1140px; --radius:14px; --shadow:0 10px 30px rgba(20,60,45,.08);
  --serif:'Playfair Display',Georgia,'Times New Roman',serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
h1,h2,h3{font-family:var(--serif);font-weight:700;line-height:1.15;color:var(--ink);margin:0 0 .5em}
h1{font-size:clamp(2rem,4.5vw,3.2rem)}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.25rem}
p{margin:0 0 1rem}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.accent{color:var(--green)}
.accent-o{color:var(--orange)}
.muted{color:var(--muted)}

/* Header / nav */
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{font-family:var(--serif);font-weight:800;font-size:1.5rem;letter-spacing:-.5px}
.brand .v{color:var(--green)} .brand .s{color:var(--orange)}
.nav ul{display:flex;gap:22px;list-style:none;margin:0;padding:0;align-items:center}
.nav a.navlink{color:var(--ink);font-weight:500;font-size:.97rem}
.nav a.navlink:hover{color:var(--green);text-decoration:none}
.nav .flags a{color:var(--muted);font-size:.85rem;margin-left:6px}
.btn{display:inline-block;border-radius:999px;padding:11px 22px;font-weight:600;font-size:.97rem;cursor:pointer;border:2px solid transparent;transition:.15s;text-align:center}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-dark);color:#fff}
.btn-orange{background:var(--orange);color:#fff}
.btn-orange:hover{background:#d4632d;color:#fff}
.btn-outline{background:#fff;color:var(--green);border-color:var(--line)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.menu-toggle{display:none;background:none;border:0;font-size:1.6rem;cursor:pointer;color:var(--ink)}

/* Hero */
.hero{padding:54px 0 40px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.eyebrow{display:inline-block;background:var(--green-soft);color:var(--green-dark);font-weight:600;font-size:.8rem;letter-spacing:.4px;padding:6px 12px;border-radius:999px;text-transform:uppercase;margin-bottom:16px}
.hero p.lead{font-size:1.12rem;color:#3c4f48;max-width:33em}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 22px}
.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:.85rem;font-weight:500;display:flex;align-items:center;gap:7px}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}

/* Cards / tables */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.savings{padding:22px}
.savings h3{font-family:var(--sans);font-size:.8rem;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin-bottom:14px}
table.price{width:100%;border-collapse:collapse;font-size:.97rem}
table.price th,table.price td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line)}
table.price th{font-family:var(--sans);font-size:.78rem;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);font-weight:600}
table.price td.num{text-align:right;font-weight:600;white-space:nowrap}
.was{color:var(--muted);text-decoration:line-through;font-weight:400;margin-right:6px}
.badge{background:var(--orange-soft);color:#b8501f;font-weight:700;font-size:.78rem;padding:3px 9px;border-radius:999px;white-space:nowrap}
.note{font-size:.82rem;color:var(--muted);margin-top:10px}

/* Sections */
section{padding:46px 0}
.section-tight{padding:30px 0}
.center{text-align:center}
.lead-c{max-width:40em;margin:0 auto 26px}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.feature h3{margin-bottom:.3em}
.panel{background:var(--navy);color:#fff;border-radius:var(--radius);padding:22px 24px}
.panel h3{color:#fff}
.banner{background:var(--green);color:#fff;text-align:center;font-size:.92rem;padding:9px 16px}
.banner a{color:#fff;text-decoration:underline}
ul.check{list-style:none;padding:0;margin:0 0 1rem}
ul.check li{padding-left:28px;position:relative;margin-bottom:9px}
ul.check li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:700}
.faq dt{font-weight:600;margin-top:16px}
.faq dd{margin:4px 0 0;color:#3c4f48}
.callout{background:var(--green-soft);border-left:4px solid var(--green);border-radius:8px;padding:16px 18px;margin:18px 0}
.cta-band{background:var(--green);color:#fff;text-align:center;border-radius:var(--radius);padding:38px 24px;margin:10px 0}
.cta-band h2{color:#fff}
.crumb{font-size:.85rem;color:var(--muted);margin:18px 0 0}
.crumb a{color:var(--muted)}

/* WhatsApp float */
.wa{position:fixed;right:18px;bottom:18px;z-index:60;background:#25d366;color:#fff;border-radius:999px;padding:13px 18px;font-weight:600;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.wa:hover{color:#fff;text-decoration:none}

/* Footer */
footer.site{background:#102019;color:#cfe0d8;margin-top:40px;padding:40px 0 26px;font-size:.92rem}
footer.site a{color:#cfe0d8}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px}
footer h4{color:#fff;font-family:var(--sans);font-size:.85rem;text-transform:uppercase;letter-spacing:.5px;margin:0 0 12px}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin-bottom:8px}
.foot-bottom{border-top:1px solid #24382e;margin-top:26px;padding-top:16px;color:#90a89d;font-size:.82rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

@media(max-width:860px){
  .hero-grid,.grid-2,.grid-3,.foot-grid{grid-template-columns:1fr}
  .nav ul{display:none}
  .nav ul.open{display:flex;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 20px;border-bottom:1px solid var(--line);gap:14px}
  .menu-toggle{display:block}
}