/* =========================================================
   Nha khoa Smile — style.css
   Phong cách: sạch, y tế, tin cậy. Trắng + xanh ngọc + xanh biển,
   bo góc vừa, icon nét mảnh, nhiều khoảng trắng nhưng có cấu trúc.
   Bố cục khác các mẫu trước:
     - Thanh thông tin trên + header ngang có nút "Đặt lịch" + hotline nổi
     - Hero là THẺ TRẮNG LỚN nổi trên nền xanh nhạt, chia 2 cột: chữ + FORM ĐẶT KHÁM ngay trong hero
     - Dịch vụ LƯỚI ICON 3 cột, hover đổi nền
     - Quy trình STEPPER NGANG có đường nối và số
     - Bác sĩ dạng CARD NGANG ảnh trái + thông tin phải
     - Trước/sau LƯỚI 2 ảnh cạnh nhau có nhãn
     - Bảng giá dạng BẢNG có cột "bảo hành"
   Ảnh: mỗi khối ảnh dùng biến --img trên thẻ HTML (đường dẫn ../images/…).
   ========================================================= */

:root{
  --teal:#0FA3A3;
  --teal-deep:#0B7F7F;
  --teal-soft:#E6F6F6;
  --blue:#1B4F8C;
  --sky:#F2F8FC;
  --sky-2:#E3EFF8;
  --text:#1F2D3D;
  --muted:#64748B;
  --line:#DCE6EF;
  --white:#fff;
  --green:#16A34A;
  --radius:12px;
  --radius-lg:20px;
  --shadow:0 1px 2px rgba(27,79,140,.05), 0 10px 28px rgba(27,79,140,.08);
  --shadow-lg:0 24px 60px rgba(27,79,140,.16);
  --ph:linear-gradient(135deg,#E3EFF8 0%,#CFE2F1 55%,#BBD5EA 100%);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',system-ui,-apple-system,sans-serif;color:var(--text);background:var(--white);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
img{max-width:100%;display:block}
svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
.ph{background:var(--img,var(--ph)) center/cover no-repeat,var(--ph)}
.container{width:min(1180px,100% - 40px);margin-inline:auto}
h1,h2,h3,h4{font-weight:700;line-height:1.2;color:var(--blue);letter-spacing:-.01em}
b,strong{font-weight:600}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 24px;border-radius:999px;font-weight:600;font-size:14.5px;transition:.2s;white-space:nowrap}
.btn svg{width:17px;height:17px}
.btn--teal{background:var(--teal);color:#fff;box-shadow:0 8px 20px rgba(15,163,163,.3)}
.btn--teal:hover{background:var(--teal-deep)}
.btn--blue{background:var(--blue);color:#fff}
.btn--blue:hover{background:#163F70}
.btn--line{border:1.5px solid var(--line);color:var(--blue);background:#fff}
.btn--line:hover{border-color:var(--teal);color:var(--teal)}
.btn--sm{padding:9px 16px;font-size:13.5px}

/* ---------- Thanh thông tin + header ---------- */
.info{background:var(--blue);color:#fff;font-size:12.5px}
.info__in{display:flex;justify-content:space-between;gap:16px;min-height:34px;align-items:center;flex-wrap:wrap}
.info__in div{display:flex;gap:18px;align-items:center}
.info svg{width:14px;height:14px;color:var(--teal)}
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header__in{display:flex;align-items:center;gap:24px;min-height:74px}
.logo{display:flex;align-items:center;gap:10px}
.logo__mark{width:42px;height:42px;border-radius:12px;background:var(--teal-soft);color:var(--teal);display:grid;place-items:center}
.logo__mark svg{width:24px;height:24px}
.logo__text b{display:block;font-size:19px;font-weight:700;color:var(--blue);line-height:1}
.logo__text small{display:block;font-size:10.5px;color:var(--muted);margin-top:3px}
.nav{display:flex;gap:2px;margin-left:auto}
.nav__link{padding:9px 13px;border-radius:999px;font-weight:500;font-size:14px;color:var(--text)}
.nav__link:hover{background:var(--sky);color:var(--blue)}
.nav__link.is-active{background:var(--teal-soft);color:var(--teal-deep);font-weight:600}
.header__cta{display:flex;align-items:center;gap:10px}
.hot{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--blue);font-size:15px}
.hot svg{color:var(--teal)}
.burger{display:none;width:42px;height:42px;border-radius:12px;background:var(--sky);place-items:center;color:var(--blue)}

/* ---------- Hero thẻ trắng + form ---------- */
.hero{background:var(--sky);padding:50px 0 70px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:var(--teal-soft);right:-160px;top:-200px}
.hero::after{content:"";position:absolute;width:300px;height:300px;border-radius:50%;background:var(--sky-2);left:-100px;bottom:-140px}
.hero__card{position:relative;z-index:1;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);display:grid;grid-template-columns:1.1fr .9fr;overflow:hidden}
.hero__text{padding:56px 50px}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--teal-soft);color:var(--teal-deep);font-size:12.5px;font-weight:600}
.hero h1{font-size:clamp(32px,4.2vw,50px);margin:18px 0 14px}
.hero h1 span{color:var(--teal)}
.hero p{color:var(--muted);font-size:16px;max-width:460px}
.hero__ticks{display:grid;gap:10px;margin:24px 0 30px}
.hero__ticks div{display:flex;gap:10px;align-items:center;font-size:14.5px}
.hero__ticks svg{color:var(--teal);background:var(--teal-soft);border-radius:50%;padding:3px;width:22px;height:22px}
.hero__trust{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--muted)}
.faces{display:flex}
.faces .ph{width:36px;height:36px;border-radius:50%;border:2px solid #fff;margin-left:-10px}
.faces .ph:first-child{margin-left:0}
.hero__form{background:var(--blue);color:#fff;padding:44px 40px;display:flex;flex-direction:column}
.hero__form h2{color:#fff;font-size:22px}
.hero__form > p{opacity:.75;font-size:13.5px;margin:6px 0 20px}
.hero__form .field{margin-bottom:12px}
.hero__form label{display:block;font-size:12px;opacity:.8;margin-bottom:5px}
.hero__form .field input,.hero__form .field select{width:100%;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.1);color:#fff;border-radius:10px;padding:12px 14px;font:inherit;outline:none}
.hero__form .field input::placeholder{color:rgba(255,255,255,.5)}
.hero__form .field select option{color:var(--text)}
.hero__form .row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.hero__form .btn{width:100%;margin-top:6px}
.hero__form small{display:block;opacity:.6;font-size:11.5px;margin-top:12px;text-align:center}

/* ---------- Số liệu ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:-30px;position:relative;z-index:2}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;gap:14px;align-items:center;box-shadow:var(--shadow)}
.stat .ic{width:46px;height:46px;border-radius:12px;background:var(--teal-soft);color:var(--teal);display:grid;place-items:center;flex:none}
.stat b{display:block;font-size:24px;color:var(--blue);line-height:1}
.stat span{font-size:12.5px;color:var(--muted)}

/* ---------- Section ---------- */
.section{padding:90px 0}
.section--sky{background:var(--sky)}
.section__head{max-width:640px;margin:0 auto 46px;text-align:center}
.section__head .pill{margin-bottom:14px}
.section__title{font-size:clamp(28px,3.6vw,40px)}
.section__head p{color:var(--muted);margin-top:12px;font-size:16px}

/* ---------- Dịch vụ lưới icon ---------- */
.services{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.svc{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;transition:.25s;display:block}
.svc:hover{background:var(--blue);color:#fff;border-color:var(--blue);transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.svc:hover h3,.svc:hover p,.svc:hover .more{color:#fff}
.svc .ic{width:56px;height:56px;border-radius:16px;background:var(--teal-soft);color:var(--teal);display:grid;place-items:center;margin-bottom:20px;transition:.25s}
.svc:hover .ic{background:rgba(255,255,255,.15);color:#fff}
.svc .ic svg{width:28px;height:28px}
.svc h3{font-size:19px;margin-bottom:8px}
.svc p{color:var(--muted);font-size:14px}
.svc .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:13.5px;font-weight:600;color:var(--teal-deep)}
.svc .price{font-size:13px;color:var(--muted);margin-top:10px}
.svc:hover .price{color:rgba(255,255,255,.75)}

/* ---------- Stepper ngang ---------- */
.stepper{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
.stepper::before{content:"";position:absolute;left:10%;right:10%;top:28px;height:2px;background:var(--line)}
.st{text-align:center;padding:0 12px;position:relative}
.st span{width:56px;height:56px;border-radius:50%;background:#fff;border:2px solid var(--teal);color:var(--teal);display:grid;place-items:center;font-weight:700;margin:0 auto 16px;position:relative;z-index:1;font-size:17px}
.st b{display:block;font-size:15px;color:var(--blue)}
.st small{color:var(--muted);font-size:13px}

/* ---------- Bác sĩ card ngang ---------- */
.doctors{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.doc{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:16px;display:grid;grid-template-columns:150px 1fr;gap:20px;align-items:center}
.doc .ph{aspect-ratio:1;border-radius:var(--radius)}
.doc h3{font-size:19px}
.doc .role{color:var(--teal-deep);font-weight:600;font-size:13.5px;margin:2px 0 8px}
.doc p{color:var(--muted);font-size:13.5px}
.doc__tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.doc__tags span{background:var(--sky);border-radius:999px;padding:3px 10px;font-size:11.5px;font-weight:600;color:var(--blue)}

/* ---------- Trước / sau ---------- */
.ba{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ba__case{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:12px}
.ba__pair{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.ba__pair .ph{aspect-ratio:1;border-radius:8px;position:relative}
.ba__pair .ph::after{content:attr(data-l);position:absolute;left:8px;top:8px;background:rgba(27,79,140,.85);color:#fff;font-size:10.5px;font-weight:600;padding:3px 8px;border-radius:999px}
.ba__case b{display:block;margin-top:12px;font-size:14.5px;color:var(--blue)}
.ba__case small{color:var(--muted);font-size:12.5px}

/* ---------- Nhận xét ---------- */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px}
.quote .stars{color:#F59E0B;letter-spacing:2px;font-size:13px}
.quote p{font-size:14.5px;margin:10px 0 18px}
.quote__who{display:flex;align-items:center;gap:12px}
.quote__who .ph{width:42px;height:42px;border-radius:50%}
.quote__who b{display:block;font-size:13.5px}
.quote__who small{color:var(--muted);font-size:12px}

/* ---------- Bảng giá ---------- */
.price{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;font-size:14.5px}
.price th{background:var(--blue);color:#fff;text-align:left;padding:14px 18px;font-weight:600;font-size:13px}
.price td{padding:14px 18px;border-top:1px solid var(--line);vertical-align:middle}
.price td b{color:var(--teal-deep)}
.price td small{display:block;color:var(--muted);font-size:12.5px}
.price tr:hover td{background:var(--sky)}
.price .grp td{background:var(--teal-soft);font-weight:700;color:var(--blue)}

/* ---------- Trang con ---------- */
.pagehead{background:var(--sky);padding:60px 0;position:relative;overflow:hidden}
.pagehead::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:var(--teal-soft);right:-140px;top:-180px}
.pagehead__in{position:relative;z-index:1}
.pagehead h1{font-size:clamp(32px,4.6vw,52px);margin-top:14px}
.pagehead p{color:var(--muted);max-width:600px;margin-top:12px;font-size:16px}
.crumbs{display:flex;gap:10px;font-size:13px;color:var(--muted);margin-top:16px}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow)}
.form__grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field--full{grid-column:1/-1}
.field label{font-size:13px;font-weight:600}
.field input,.field select,.field textarea{border:1.5px solid var(--line);border-radius:10px;padding:12px 14px;font:inherit;outline:none;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--teal)}
.field textarea{min-height:100px;resize:vertical}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips label{padding:9px 14px;border:1.5px solid var(--line);border-radius:999px;font-size:13.5px;cursor:pointer;display:flex;gap:8px;align-items:center}
.chips input{accent-color:var(--teal)}
.book{display:grid;grid-template-columns:.8fr 1.2fr;gap:40px;align-items:start}
.side{background:var(--sky);border-radius:var(--radius-lg);padding:28px;position:sticky;top:90px}
.side h3{font-size:18px;margin-bottom:12px}
.side div{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--line);font-size:14px}
.side div span:first-child{color:var(--muted)}
.contact{display:grid;grid-template-columns:1fr 1.2fr;gap:40px}
.contact__list{display:grid;gap:14px;margin-top:20px}
.contact__list div{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.contact__list .ic{width:42px;height:42px;border-radius:12px;background:var(--teal-soft);color:var(--teal);display:grid;place-items:center;flex:none}
.contact__list b{display:block;font-size:14px;color:var(--blue)}
.contact__list span{color:var(--muted);font-size:13.5px}
.map{aspect-ratio:16/7;border-radius:var(--radius-lg);margin-top:40px;filter:saturate(.5)}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 22px;margin-bottom:10px}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;font-weight:600;color:var(--blue)}
.faq summary::-webkit-details-marker{display:none}
.faq summary span{color:var(--teal)}
.faq p{color:var(--muted);margin-top:10px;font-size:14px}

/* ---------- CTA ---------- */
.cta{background:var(--teal);color:#fff;border-radius:var(--radius-lg);padding:50px;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}
.cta h2{color:#fff;font-size:28px}
.cta p{opacity:.9;margin-top:6px}
.cta .btn{background:#fff;color:var(--teal-deep)}

/* ---------- Footer ---------- */
.footer{background:var(--blue);color:#fff;padding:60px 0 0;margin-top:40px}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
.footer .logo__mark{background:rgba(255,255,255,.12);color:#fff}
.footer .logo__text b{color:#fff}.footer .logo__text small{color:rgba(255,255,255,.6)}
.footer__col p{opacity:.7;font-size:13.5px;margin-top:14px;max-width:300px}
.footer__col h4{color:#fff;font-size:13px;letter-spacing:1px;text-transform:uppercase;margin-bottom:16px}
.footer__col a,.footer__col li{display:block;padding:4px 0;font-size:14px;opacity:.85;list-style:none}
.footer__col a:hover{color:var(--teal);opacity:1}
.footer__bar{margin-top:50px;border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:12.5px;opacity:.6;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ---------- Responsive ---------- */
@media (max-width:1100px){.services,.ba,.quotes{grid-template-columns:repeat(2,1fr)}.stats{grid-template-columns:repeat(2,1fr)}.footer__grid{grid-template-columns:1fr 1fr}}
@media (max-width:980px){
  .nav{display:none}
  .nav.is-open{display:flex;position:fixed;inset:74px 0 auto 0;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:12px 20px 20px;z-index:60}
  .nav.is-open .nav__link{padding:12px 14px}
  .hot,.header__cta .btn{display:none}
  .burger{display:grid;margin-left:auto}
  .info{display:none}
  .hero__card{grid-template-columns:1fr}
  .hero__text{padding:36px 28px}
  .hero__form{padding:32px 28px}
  .stepper{grid-template-columns:1fr;gap:20px}
  .stepper::before{display:none}
  .st{display:flex;gap:16px;text-align:left;align-items:center}
  .st span{margin:0}
  .doctors{grid-template-columns:1fr}
  .book,.contact{grid-template-columns:1fr}
  .side{position:static}
}
@media (max-width:640px){
  .container{width:min(1180px,100% - 32px)}
  .section{padding:60px 0}
  .services,.ba,.quotes,.stats,.form__grid{grid-template-columns:1fr}
  .stats{margin-top:20px}
  .doc{grid-template-columns:1fr}
  .doc .ph{max-width:200px}
  .footer__grid{grid-template-columns:1fr}
  .form{padding:24px}
  .cta{padding:32px 24px}
  .hero__form .row{grid-template-columns:1fr}
}