/* at Huong's — đổi màu toàn website ở khối :root này */
:root{
  --pine:#0E3B3A;        /* xanh chủ đạo */
  --pine-2:#16504E;
  --pine-3:#0A2C2B;
  --gold:#D9BE85;        /* vàng trên nền xanh */
  --gold-ink:#7D6233;    /* vàng trên nền sáng */
  --ivory:#FAF8F3;
  --mist:#EEF3F0;
  --ink:#1B2B2A;
  --muted:#52625F;
  --line:#DCE3DE;
  --on-pine:#F4F1E8;
  --on-pine-2:#C4D2CD;
  --serif:'Cormorant Garamond',Georgia,'Times New Roman',serif;
  --sans:'Be Vietnam Pro',-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --header-h:76px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--ivory);color:var(--ink);font:400 16px/1.75 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--gold-ink);outline-offset:3px}
section[id]{scroll-margin-top:var(--header-h)}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 32px}
h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.14;letter-spacing:-.005em}
h2{font-size:clamp(34px,4.6vw,52px);color:var(--pine)}
h3{font-size:28px;color:var(--pine)}
.eyebrow{display:flex;align-items:center;gap:14px;font-size:12.5px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--gold-ink);margin-bottom:20px}
.eyebrow::before{content:'';width:36px;height:1px;background:currentColor;flex:none}
.lead{font-size:17px;color:var(--muted);max-width:60ch}
.section{padding:clamp(72px,10vw,120px) 0}
.section-head{max-width:680px;margin-bottom:clamp(40px,6vw,64px)}
.section-head .lead{margin-top:18px}

/* Nút */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:12px 30px;border:1px solid transparent;border-radius:2px;font-size:14.5px;font-weight:500;letter-spacing:.03em;cursor:pointer;transition:background .25s,color .25s,border-color .25s}
.btn-gold{background:var(--gold);color:var(--pine-3)}
.btn-gold:hover{background:#E6D0A0}
.btn-line{border-color:rgba(244,241,232,.5);color:var(--on-pine)}
.btn-line:hover{background:rgba(244,241,232,.1);border-color:var(--on-pine)}
.btn-pine{background:var(--pine);color:var(--on-pine)}
.btn-pine:hover{background:var(--pine-2)}
.link{display:inline-flex;align-items:center;gap:10px;font-size:14.5px;font-weight:500;color:var(--pine);border-bottom:1px solid var(--gold-ink);padding-bottom:3px;transition:gap .25s}
.link:hover{gap:16px}

/* Đầu trang */
header{position:sticky;top:0;z-index:50;background:var(--pine);color:var(--on-pine);border-bottom:1px solid rgba(217,190,133,.22)}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);gap:20px}
.brand{display:flex;flex-direction:column;line-height:1.1}
.brand b{font:italic 500 27px/1 var(--serif);color:var(--on-pine)}
.brand small{font-size:9.5px;letter-spacing:.27em;color:var(--gold);margin-top:6px;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:32px;font-size:14px}
.nav-links a{color:var(--on-pine-2);transition:color .2s}
.nav-links a:hover{color:#fff}
.nav-links a.nav-cta{color:var(--gold);border:1px solid var(--gold);padding:9px 20px;border-radius:2px}
.nav-links a.nav-cta:hover{background:var(--gold);color:var(--pine-3)}
.nav-toggle{display:none;width:44px;height:44px;background:none;border:0;cursor:pointer;position:relative}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:'';position:absolute;left:10px;width:24px;height:1.5px;background:var(--on-pine);transition:transform .25s,top .25s}
.nav-toggle span{top:21px}.nav-toggle span::before{left:0;top:-7px}.nav-toggle span::after{left:0;top:7px}
.nav-toggle[aria-expanded=true] span{background:transparent}
.nav-toggle[aria-expanded=true] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded=true] span::after{top:0;transform:rotate(-45deg)}

/* Banner */
.hero{background:radial-gradient(120% 120% at 85% 0%,var(--pine-2) 0%,var(--pine) 48%,var(--pine-3) 100%);color:var(--on-pine);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:clamp(32px,6vw,84px);align-items:center;padding-top:clamp(48px,7vw,84px);padding-bottom:clamp(56px,7vw,92px)}
.hero .eyebrow{color:var(--gold)}
.hero h1{font-size:clamp(44px,6.4vw,80px);line-height:1.06;color:#fff}
.hero h1 em{color:var(--gold);font-style:italic}
.hero p{margin-top:26px;font-size:17.5px;color:var(--on-pine-2);max-width:50ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.hero-photo{position:relative;justify-self:center;width:min(100%,420px)}
.hero-photo::before{content:'';position:absolute;inset:-14px;border:1px solid rgba(217,190,133,.55);border-radius:999px 999px 0 0}
.hero-photo img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:999px 999px 0 0}
.facts{background:var(--pine-3);color:var(--on-pine)}
.facts ul{list-style:none;display:grid;grid-template-columns:repeat(4,1fr)}
.facts li{padding:26px 24px;border-left:1px solid rgba(217,190,133,.2)}
.facts li:first-child{border-left:0;padding-left:0}
.facts b{display:block;font:500 25px/1.2 var(--serif);color:var(--gold)}
.facts span{font-size:13.5px;color:var(--on-pine-2)}

/* Giới thiệu */
.about-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(40px,7vw,96px);align-items:start}
.about-photos{position:relative;padding-bottom:64px;padding-right:56px}
.about-photos img:first-child{width:100%;aspect-ratio:4/5;object-fit:cover;object-position:40% 50%}
.about-photos img:last-child{position:absolute;right:0;bottom:0;width:46%;aspect-ratio:3/4;object-fit:cover;object-position:50% 12%;border:8px solid var(--ivory)}
.about-text p{margin-top:18px;color:var(--muted)}
.about-text h2{margin-bottom:26px}
blockquote{margin-top:34px;padding-left:26px;border-left:1px solid var(--gold-ink);font:italic 500 clamp(24px,2.8vw,31px)/1.32 var(--serif);color:var(--pine)}

/* Lớp học */
.classes{background:var(--mist)}
.class-list{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.class{display:flex;flex-direction:column;background:#fff}
.class img{width:100%;aspect-ratio:4/3;object-fit:cover}
.class div{display:flex;flex-direction:column;flex:1;padding:28px 28px 30px}
.class p{margin:12px 0 22px;font-size:15px;color:var(--muted)}
.class .link{margin-top:auto;align-self:flex-start}
.modes{display:grid;grid-template-columns:1fr 1fr;margin-top:28px;background:var(--pine);color:var(--on-pine)}
.modes div{padding:30px 34px}
.modes div+div{border-left:1px solid rgba(217,190,133,.25)}
.modes h3{color:var(--gold);font-size:25px}
.modes p{margin-top:6px;font-size:15px;color:var(--on-pine-2)}

/* Quà tặng */
.gift{display:grid;grid-template-columns:.8fr 1.2fr;align-items:stretch;background:#fff;border:1px solid var(--line)}
.gift+.gift{margin-top:28px}
.gift img{width:100%;height:100%;min-height:300px;max-height:460px;object-fit:cover}
.gift-body{display:flex;flex-direction:column;align-items:flex-start;padding:clamp(28px,4vw,52px)}
.tag{font-size:12px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--gold-ink);margin-bottom:12px}
.gift h3{font-size:clamp(30px,3.4vw,40px)}
.gift p{margin-top:14px;color:var(--muted)}
.gift ul{list-style:none;margin:18px 0 26px}
.gift li{position:relative;padding-left:24px;margin-top:6px;font-size:15px}
.gift li::before{content:'';position:absolute;left:0;top:.8em;width:12px;height:1px;background:var(--gold-ink)}

/* Kiến thức */
.knowledge{background:var(--pine);color:var(--on-pine)}
.knowledge h2{color:#fff}.knowledge .eyebrow{color:var(--gold)}.knowledge .lead{color:var(--on-pine-2)}
.topics{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid rgba(217,190,133,.3)}
.topic{padding:34px 34px 8px 0}
.topic+.topic{padding-left:34px;border-left:1px solid rgba(217,190,133,.3)}
.topic i{display:block;font:italic 500 44px/1 var(--serif);color:var(--gold)}
.topic h3{margin-top:6px;color:#fff;font-size:25px}
.topic p{margin-top:12px;font-size:15px;color:var(--on-pine-2)}

/* Khoảnh khắc */
.gallery{columns:3;column-gap:16px}
.gallery button{display:block;width:100%;margin-bottom:16px;padding:0;background:none;border:0;cursor:zoom-in;break-inside:avoid;overflow:hidden}
.gallery img{width:100%;transition:transform .6s ease}
.gallery button:hover img{transform:scale(1.03)}
dialog{margin:auto;padding:0;background:transparent;border:0;max-width:94vw;max-height:94vh}
dialog::backdrop{background:rgba(6,26,25,.92)}
dialog img{max-width:94vw;max-height:88vh;width:auto;height:auto}
dialog button{position:fixed;top:14px;right:14px;width:48px;height:48px;background:none;border:0;color:#fff;font-size:30px;line-height:1;cursor:pointer}

/* Đăng ký */
.signup{background:var(--mist)}
.signup-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(40px,6vw,80px);align-items:start}
.contact{list-style:none;margin-top:30px;border-top:1px solid var(--line)}
.contact li{display:grid;grid-template-columns:96px 1fr;gap:12px;padding:15px 0;border-bottom:1px solid var(--line);font-size:15px}
.contact span{color:var(--muted);font-size:13.5px}
.contact a{color:var(--pine);font-weight:500}
.contact a:hover{text-decoration:underline}
form,.sent{background:#fff;padding:clamp(26px,4vw,44px)}
.field{margin-bottom:18px}
.field label{display:block;margin-bottom:6px;font-size:13.5px;font-weight:500}
.field input,.field select,.field textarea{width:100%;min-height:48px;padding:11px 14px;background:var(--ivory);border:1px solid var(--line);border-radius:2px;font-size:16px}
.field textarea{min-height:92px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--pine);box-shadow:0 0 0 2px rgba(14,59,58,.14)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.err{display:none;margin-top:5px;font-size:13px;color:#A23B2A}
.field.bad .err{display:block}.field.bad input{border-color:#A23B2A}
.note{margin-top:14px;font-size:13px;color:var(--muted)}
form .btn{width:100%}
.note a{text-decoration:underline}
.sent h3{margin-bottom:10px}
.sent p{color:var(--muted);margin-bottom:16px}
.sent pre{margin-bottom:22px;padding:16px;background:var(--mist);white-space:pre-wrap;word-break:break-word;font:400 14.5px/1.65 var(--sans)}
.sent .row{display:flex;flex-wrap:wrap;gap:12px}
.btn-plain{background:none;border-color:var(--line);color:var(--pine)}
.btn-plain:hover{border-color:var(--pine)}

/* Chân trang */
footer{background:var(--pine-3);color:var(--on-pine-2);padding:60px 0 30px;font-size:14.5px}
.foot{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;padding-bottom:36px}
.foot p{margin-top:18px;max-width:38ch}
.foot h4{margin-bottom:14px;font-size:12.5px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
.foot nav a{display:block;padding:4px 0}
.foot a:hover{color:#fff}
.foot-end{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 28px;padding-top:24px;border-top:1px solid rgba(217,190,133,.2);font-size:13px}
.foot-end a{text-decoration:underline}

/* Nút Zalo nổi */
.zalo-float{position:fixed;right:20px;bottom:20px;z-index:40;display:flex;align-items:center;min-height:48px;padding:0 22px;background:var(--gold);color:var(--pine-3);border-radius:999px;font-size:14.5px;font-weight:600;box-shadow:0 10px 26px -10px rgba(6,26,25,.6)}
.zalo-float:hover{background:#E6D0A0}

/* Trang văn bản */
.doc{padding:clamp(52px,8vw,88px) 0}
.doc .wrap{max-width:780px}
.doc h1{font-size:clamp(38px,5vw,52px);color:var(--pine);margin-bottom:10px}
.doc h2{font-size:27px;margin:36px 0 8px}
.doc p,.doc li{color:var(--muted)}
.doc ul{margin:8px 0 0 22px}
.doc a{color:var(--pine);text-decoration:underline}

/* Máy bảng & điện thoại */
@media (max-width:960px){
  .nav-toggle{display:block}
  .nav-links{position:absolute;left:0;right:0;top:100%;display:none;flex-direction:column;align-items:stretch;gap:0;padding:8px 32px 24px;background:var(--pine);border-bottom:1px solid rgba(217,190,133,.22)}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 0;font-size:16px;border-bottom:1px solid rgba(217,190,133,.14)}
  .nav-links a.nav-cta{margin-top:14px;text-align:center;border:1px solid var(--gold)}
  .hero-grid,.about-grid,.signup-grid{grid-template-columns:1fr}
  .hero-photo{width:min(78%,360px);margin-top:18px}
  .about-photos{max-width:520px}
  .class-list{grid-template-columns:1fr 1fr}
  .class:last-child{grid-column:1/-1}
  .class:last-child img{aspect-ratio:16/8}
  .gallery{columns:2}
  .facts ul{grid-template-columns:1fr 1fr}
  .facts li:nth-child(odd){border-left:0;padding-left:0}
  .facts li:nth-child(n+3){border-top:1px solid rgba(217,190,133,.2)}
  .foot{grid-template-columns:1fr 1fr}
  .foot>div:first-child{grid-column:1/-1}
}
@media (max-width:640px){
  .wrap{padding:0 20px}
  .nav-links{padding-left:20px;padding-right:20px}
  .hero-actions .btn{width:100%}
  .class-list,.topics,.modes{grid-template-columns:1fr}
  .class:last-child img{aspect-ratio:4/3}
  .modes div+div{border-left:0;border-top:1px solid rgba(217,190,133,.25)}
  .modes div{padding:24px}
  .topic,.topic+.topic{padding:26px 0;border-left:0}
  .topic+.topic{border-top:1px solid rgba(217,190,133,.3)}
  .gift{grid-template-columns:1fr}
  .gift img{height:auto;aspect-ratio:4/3;min-height:0}
  .field-row{grid-template-columns:1fr;gap:0}
  .contact li{grid-template-columns:78px 1fr}
  .foot-end{padding-bottom:64px}
  .facts li{padding:20px 14px}
  .facts b{font-size:21px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition-duration:.001ms!important}
}

/* Ô chọn khoá học có tên dài: để hàng riêng cho đủ chữ */
.field-row.stack{grid-template-columns:1fr;gap:0}