/* ASTRA English Center — site.css (v4) */
/* ---------- Fonts (tự host, hỗ trợ tiếng Việt) ---------- */
@font-face{font-family:"Plus Jakarta Sans";font-style:normal;font-weight:200 800;font-display:swap;src:url(/assets/fonts/plus-jakarta-sans-vietnamese-wght-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Plus Jakarta Sans";font-style:normal;font-weight:200 800;font-display:swap;src:url(/assets/fonts/plus-jakarta-sans-latin-wght-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/be-vietnam-pro-vietnamese-400-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/be-vietnam-pro-latin-400-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/be-vietnam-pro-vietnamese-500-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/be-vietnam-pro-latin-500-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/be-vietnam-pro-vietnamese-600-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/be-vietnam-pro-latin-600-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/be-vietnam-pro-vietnamese-700-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/be-vietnam-pro-latin-700-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

/* ---------- Tokens (màu lấy từ logo Astra) ---------- */
:root{
  color-scheme:light;
  --blue:#135CA0;        /* xanh chữ Astra */
  --blue-deep:#0B3F72;
  --sky:#2EA3DD;         /* xanh địa cầu */
  --sky-soft:#E8F5FC;
  --orange:#F6A31C;      /* cam ngôi sao */
  --orange-deep:#E08A00;
  --orange-soft:#FFF3DE;
  --mint:#1FB28A;
  --pink:#EF5B7B;
  --paper:#FFFFFF;
  --bg-2:#F5F9FD;
  --ink:#0F2440;
  --ink-2:#51637A;
  --line:#DDE7F1;
  --error:#C62828;
  --font-display:"Plus Jakarta Sans","Be Vietnam Pro",system-ui,sans-serif;
  --font-body:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --gutter:clamp(20px,4.5vw,56px);
  --max:1200px;
  --header-h:78px;
  --r:24px;
  --r-sm:14px;
  --shadow:0 24px 60px -30px rgba(19,92,160,.35);
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px)}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:1.0625rem;line-height:1.7;-webkit-font-smoothing:antialiased}
img,svg,picture{display:block;max-width:100%}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:6px}
.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:12px;top:-60px;z-index:100;background:var(--orange);color:var(--ink);padding:10px 16px;border-radius:10px;text-decoration:none;font-weight:700}
.skip-link:focus{top:12px}
.wrap{width:100%;max-width:calc(var(--max) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
.star{width:1em;height:1em;fill:currentColor;flex:none}
.art{display:block;width:100%;height:auto;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.art text{fill:currentColor;stroke:none;font-family:var(--font-display);font-weight:800}

/* ---------- Type ---------- */
h1,h2,h3,.display{font-family:var(--font-display);font-weight:800;letter-spacing:-.025em;text-wrap:balance}
h2{font-size:clamp(2rem,4.2vw,3.2rem);line-height:1.1}
h3{font-size:clamp(1.2rem,1.8vw,1.45rem);line-height:1.25;letter-spacing:-.015em}
.tag{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;background:var(--orange-soft);color:var(--orange-deep);font-weight:700;font-size:.88rem;margin-bottom:18px}
.tag .star{width:13px;height:13px}
.tag.t-sky{background:var(--sky-soft);color:var(--blue)}
.lead{font-size:clamp(1.05rem,1.4vw,1.18rem);line-height:1.7;color:var(--ink-2);max-width:54ch}
.prose{max-width:62ch}
.prose p+p{margin-top:1em}
.hl{color:var(--orange)}
.link{display:inline-flex;align-items:center;gap:.5em;font-weight:700;color:var(--blue);text-decoration:none}
.link::after{content:"";width:8px;height:8px;border-top:2px solid currentColor;border-right:2px solid currentColor;transform:rotate(45deg);transition:transform .25s}
.link:hover::after{transform:translateX(4px) rotate(45deg)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6em;min-height:54px;padding:.8rem 1.6rem;border-radius:999px;border:2px solid transparent;font-weight:700;font-size:1rem;line-height:1.2;text-decoration:none;cursor:pointer;transition:background-color .2s,color .2s,border-color .2s,transform .2s var(--ease),box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn .star{width:.95em;height:.95em;transition:transform .5s var(--ease)}
.btn:hover .star{transform:rotate(90deg) scale(1.15)}
.btn-star{background:var(--orange);color:#fff;box-shadow:0 12px 24px -12px rgba(246,163,28,.9)}
.btn-star:hover{background:var(--orange-deep)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 12px 24px -14px rgba(19,92,160,.9)}
.btn-primary:hover{background:var(--blue-deep)}
.btn-primary .star{color:var(--orange)}
.btn-ghost{border-color:var(--blue);color:var(--blue);background:#fff}
.btn-ghost:hover{background:var(--blue);color:#fff}
.btn-line-light{border-color:rgba(255,255,255,.7);color:#fff}
.btn-line-light:hover{background:#fff;color:var(--blue)}
.btn-sm{min-height:44px;padding:.55rem 1.15rem;font-size:.95rem}
.actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 8px 24px -20px rgba(15,36,64,.4)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:var(--header-h)}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--blue)}
.brand img{height:46px;width:auto}
.brand-sub{font-family:var(--font-display);font-weight:700;font-size:.8rem;line-height:1.15;color:var(--blue);border-left:2px solid var(--orange);padding-left:12px}
.nav ul{display:flex;align-items:center;gap:clamp(2px,.8vw,8px)}
.nav a{display:inline-block;padding:9px 14px;border-radius:999px;text-decoration:none;font-weight:600;font-size:.96rem;color:var(--ink);transition:background-color .2s,color .2s}
.nav a:hover{background:var(--sky-soft);color:var(--blue)}
.nav a[aria-current]{background:var(--sky-soft);color:var(--blue)}
.nav-cta{display:none}
.menu-btn{display:none;align-items:center;gap:10px;min-height:44px;padding:0 14px;background:var(--sky-soft);border:0;border-radius:999px;cursor:pointer;font-weight:700;color:var(--blue)}
.menu-btn .bars{position:relative;width:20px;height:12px}
.menu-btn .bars::before,.menu-btn .bars::after{content:"";position:absolute;left:0;right:0;height:2px;border-radius:2px;background:currentColor;transition:transform .3s,top .3s}
.menu-btn .bars::before{top:0}
.menu-btn .bars::after{top:10px}
.menu-btn[aria-expanded="true"] .bars::before{top:5px;transform:rotate(45deg)}
.menu-btn[aria-expanded="true"] .bars::after{top:5px;transform:rotate(-45deg)}
@media(max-width:959px){
  .header-cta{display:none}
  .menu-btn{display:inline-flex}
  .brand-sub{display:none}
  .brand img{height:40px}
  .js .nav{position:fixed;inset:var(--header-h) 0 0 0;background:#fff;padding:12px var(--gutter) 40px;overflow-y:auto;visibility:hidden;opacity:0;transform:translateY(-8px);transition:opacity .25s,transform .25s,visibility 0s .25s}
  .js .nav[data-open="true"]{visibility:visible;opacity:1;transform:none;transition:opacity .25s,transform .25s}
  .nav ul{flex-direction:column;align-items:stretch;gap:6px}
  .nav li a{display:block;padding:16px 20px;border-radius:var(--r-sm);font-family:var(--font-display);font-size:1.4rem;font-weight:800;background:var(--bg-2)}
  .nav .nav-cta{display:block;margin-top:18px}
  .nav li.nav-cta a{display:flex;justify-content:center;padding:.9rem 1.5rem;border-radius:999px;font-family:var(--font-body);font-size:1rem;font-weight:700;background:var(--orange);color:#fff}
  body.nav-open{overflow:hidden}
  .no-js .bar{flex-wrap:wrap}
}

/* ---------- Sections ---------- */
.section{padding-block:clamp(72px,9vw,120px)}
.bg-2{background:var(--bg-2)}
.bg-sky{background:var(--sky-soft)}
.section-head{display:grid;gap:16px;margin-bottom:clamp(36px,5vw,56px)}
@media(min-width:900px){.section-head{grid-template-columns:minmax(0,6fr) minmax(0,5fr);align-items:end;gap:64px}}
.center-head{text-align:center;display:grid;justify-items:center;gap:14px;margin-bottom:clamp(40px,5vw,60px)}
.center-head .tag{margin-bottom:0}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#F1F8FE 0%,#FFFFFF 100%);padding-block:clamp(36px,5vw,72px) clamp(64px,8vw,104px)}
.hero .wrap{position:relative}
.orbit{position:absolute;pointer-events:none}
.orbit.o1{right:-12%;top:-18%;width:min(760px,70vw);color:var(--orange);opacity:.9}
.orbit.o2{left:-14%;bottom:-40%;width:min(620px,70vw);color:var(--sky);opacity:.35}
.hero-grid{display:grid;gap:clamp(40px,5vw,64px);align-items:center}
@media(min-width:1000px){.hero-grid{grid-template-columns:minmax(0,11fr) minmax(0,10fr)}}
.hero-title{font-size:clamp(2.7rem,5.8vw,4.6rem);line-height:1;letter-spacing:-.04em;color:var(--blue)}
.hero-title span{display:block}
.hero-title .l2{color:var(--orange)}
.hero-sub{margin-top:clamp(20px,2.5vw,28px);font-size:clamp(1.08rem,1.45vw,1.25rem);line-height:1.65;max-width:40ch;color:var(--ink-2)}
.hero .actions{margin-top:clamp(26px,3vw,36px)}
.pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.pill{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;font-weight:700;font-size:.92rem;text-decoration:none;transition:transform .2s var(--ease)}
.pill:hover{transform:translateY(-2px)}
.p-orange{background:var(--orange-soft);color:var(--orange-deep)}
.p-blue{background:#E4EEF8;color:var(--blue)}
.p-sky{background:var(--sky-soft);color:#157FB3}
.pill::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor}

.collage{position:relative;padding:0 0 60px 40px}
.collage .main{position:relative;border-radius:32px;overflow:hidden;aspect-ratio:16/9.5;box-shadow:var(--shadow);transform:rotate(1.5deg)}
.collage .main img,.collage .sub img{width:100%;height:100%;object-fit:cover}
.collage .main img{object-position:50% 96%}
.collage .sub{position:absolute;left:0;bottom:0;width:42%;aspect-ratio:4/3;border-radius:22px;overflow:hidden;border:6px solid #fff;box-shadow:var(--shadow);transform:rotate(-4deg)}
.badge{position:absolute;right:-8px;bottom:18px;width:132px;height:132px;border-radius:50%;background:var(--orange);color:#fff;display:grid;place-items:center;text-align:center;font-family:var(--font-display);font-weight:800;font-size:.95rem;line-height:1.15;padding:18px;box-shadow:0 16px 30px -14px rgba(224,138,0,.9);transform:rotate(8deg)}
.badge small{display:block;font-size:1.25rem;letter-spacing:-.02em}
.chip{position:absolute;top:22px;left:4px;display:inline-flex;align-items:center;gap:8px;background:#fff;border-radius:999px;padding:10px 16px;font-weight:700;font-size:.92rem;color:var(--blue);box-shadow:var(--shadow);transform:rotate(-3deg)}
.chip .star{color:var(--orange)}
@media(max-width:560px){.collage{padding:0 0 44px 14px}.badge{width:104px;height:104px;font-size:.8rem;padding:12px}.badge small{font-size:1rem}.chip{font-size:.82rem;padding:8px 12px}}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.hero-copy>*{animation:rise .9s var(--ease) both}
.hero-copy>*:nth-child(2){animation-delay:.07s}
.hero-copy>*:nth-child(3){animation-delay:.14s}
.hero-copy>*:nth-child(4){animation-delay:.21s}
.hero-copy>*:nth-child(5){animation-delay:.28s}
.collage{animation:rise 1s var(--ease) .15s both}
@keyframes bob{0%,100%{translate:0 0}50%{translate:0 -8px}}
.badge,.chip{animation:bob 6s ease-in-out infinite}
.chip{animation-delay:-3s}

/* Dải thông tin */
.facts{position:relative;margin-top:-40px;z-index:2}
.facts ul{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(min-width:900px){.facts ul{grid-template-columns:repeat(4,1fr);gap:16px}}
.facts li{background:#fff;border-radius:var(--r-sm);padding:18px 20px;box-shadow:0 16px 40px -28px rgba(15,36,64,.45);display:grid;gap:2px;border-top:4px solid var(--c)}
.facts .k{font-size:.82rem;font-weight:700;color:var(--c)}
.facts .v{font-family:var(--font-display);font-weight:800;font-size:1.05rem;line-height:1.3;color:var(--ink);text-decoration:none}
.facts a.v:hover{color:var(--blue)}

/* ---------- Chương trình ---------- */
.programs{display:grid;gap:22px}
@media(min-width:900px){.programs{grid-template-columns:repeat(3,minmax(0,1fr))}}
.program{position:relative;display:flex;flex-direction:column;background:#fff;border-radius:var(--r);overflow:hidden;text-decoration:none;box-shadow:0 20px 50px -34px rgba(15,36,64,.5);border:1px solid var(--line);transition:transform .35s var(--ease),box-shadow .35s}
.program:hover{transform:translateY(-6px);box-shadow:0 30px 60px -30px rgba(15,36,64,.45)}
.program-art{position:relative;background:var(--c);color:#fff;aspect-ratio:16/9;display:grid;place-items:center;overflow:hidden}
.program-art .art{width:44%;stroke-width:2}
.program-art::before{content:"";position:absolute;width:70%;aspect-ratio:1;border-radius:50%;background:rgba(255,255,255,.12);right:-18%;top:-30%}
.program-art::after{content:"";position:absolute;width:40%;aspect-ratio:1;border-radius:50%;background:rgba(255,255,255,.1);left:-10%;bottom:-24%}
.program-body{padding:26px 28px 10px;display:grid;gap:10px;flex:1;align-content:start}
.program-name{font-family:var(--font-display);font-weight:800;font-size:1.9rem;letter-spacing:-.03em;color:var(--ink)}
.program-desc{color:var(--ink-2)}
.program-go{padding:10px 28px 28px}
.program-go span{display:inline-flex;align-items:center;gap:.5em;font-weight:700;color:var(--c-text,var(--blue))}
.program-go span::after{content:"";width:8px;height:8px;border-top:2px solid currentColor;border-right:2px solid currentColor;transform:rotate(45deg);transition:transform .25s}
.program:hover .program-go span::after{transform:translateX(4px) rotate(45deg)}
.c-orange{--c:var(--orange);--c-text:var(--orange-deep)}
.c-blue{--c:var(--blue);--c-text:var(--blue)}
.c-sky{--c:var(--sky);--c-text:#157FB3}
.c-mint{--c:var(--mint);--c-text:#138A6A}
.c-pink{--c:var(--pink);--c-text:#D23E60}

/* ---------- Ảnh lớp học ---------- */
.photo-grid{display:grid;gap:16px}
@media(min-width:800px){.photo-grid{grid-template-columns:7fr 5fr;grid-template-rows:1fr 1fr}}
.photo{position:relative;border-radius:var(--r);overflow:hidden;background:var(--sky-soft);min-height:240px}
.photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:var(--fp,50% 50%);transition:transform .8s var(--ease)}
.photo:hover img{transform:scale(1.04)}
@media(min-width:800px){.photo.big{grid-row:1/span 2;min-height:520px}}
.photo figcaption{position:absolute;left:16px;bottom:16px;display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.95);color:var(--ink);font-weight:700;font-size:.92rem;padding:8px 14px;border-radius:999px}
.photo figcaption::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--c,var(--orange))}

/* ---------- Giá trị ---------- */
.values{display:grid;gap:18px}
@media(min-width:700px){.values{grid-template-columns:1fr 1fr}}
@media(min-width:1100px){.values{grid-template-columns:repeat(4,1fr)}}
.value{background:#fff;border-radius:var(--r);padding:28px;display:grid;gap:12px;align-content:start;border:1px solid var(--line);transition:transform .3s var(--ease),box-shadow .3s}
.value:hover{transform:translateY(-4px);box-shadow:0 24px 50px -32px rgba(15,36,64,.45)}
.icon{display:grid;place-items:center;width:58px;height:58px;border-radius:18px;background:var(--c);color:#fff;margin-bottom:6px}
.icon .art{width:32px;height:32px;stroke-width:2.2}
.value p{color:var(--ink-2)}

/* ---------- Dải thương hiệu ---------- */
.brand-band{position:relative;overflow:hidden;background:var(--blue);color:#fff}
.brand-band .wrap{position:relative;display:grid;gap:36px;align-items:center}
@media(min-width:900px){.brand-band .wrap{grid-template-columns:minmax(0,6fr) minmax(0,5fr)}}
.words{display:grid;gap:4px}
.words li{display:flex;align-items:center;gap:18px;font-family:var(--font-display);font-weight:800;font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.08;letter-spacing:-.04em}
.words li .star{width:.42em;height:.42em}
.words li:nth-child(1) .star{color:var(--orange)}
.words li:nth-child(2){color:#9ED8F5}
.words li:nth-child(2) .star{color:#fff}
.words li:nth-child(3) .star{color:var(--sky)}
.words li:nth-child(4){color:var(--orange)}
.words li:nth-child(4) .star{color:#fff}
.brand-band p{color:rgba(255,255,255,.85);max-width:44ch}
.brand-band h2{font-size:clamp(1.7rem,2.8vw,2.3rem);margin-bottom:14px}

/* ---------- Các bước ---------- */
.steps{display:grid;gap:18px}
@media(min-width:700px){.steps{grid-template-columns:1fr 1fr}}
@media(min-width:1100px){.steps{grid-template-columns:repeat(4,1fr)}}
.step{position:relative;background:#fff;border-radius:var(--r);padding:28px;display:grid;gap:10px;align-content:start;border:1px solid var(--line)}
.step-no{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:var(--c);color:#fff;font-family:var(--font-display);font-weight:800;font-size:1.2rem;margin-bottom:6px}
.step p{color:var(--ink-2)}
.step:nth-child(1){--c:var(--orange)}
.step:nth-child(2){--c:var(--sky)}
.step:nth-child(3){--c:var(--blue)}
.step:nth-child(4){--c:var(--mint)}

/* ---------- Đăng ký ---------- */
.register{background:linear-gradient(135deg,var(--sky-soft) 0%,#FFF6E6 100%)}
.contact-grid{display:grid;gap:clamp(36px,5vw,72px)}
@media(min-width:960px){.contact-grid{grid-template-columns:minmax(0,5fr) minmax(0,6fr);align-items:start}}
.contact-list{display:grid;gap:22px;align-content:start}
.c-item{display:flex;gap:16px;align-items:flex-start}
.c-item .icon{width:50px;height:50px;border-radius:16px;margin:0;flex:none}
.c-item .icon .art{width:26px;height:26px}
.c-item .label{font-size:.85rem;font-weight:700;color:var(--ink-2)}
.c-item .big{font-family:var(--font-display);font-weight:800;font-size:1.25rem;line-height:1.35}
.c-item a{text-decoration:none}
.c-item a:hover{color:var(--blue)}
.form-shell{background:#fff;border-radius:var(--r);padding:clamp(24px,3.5vw,40px);box-shadow:0 30px 70px -40px rgba(15,36,64,.5)}
.form-shell h2{font-size:clamp(1.6rem,2.6vw,2.1rem);margin-bottom:8px;color:var(--blue)}
.form-shell .hint{color:var(--ink-2);margin-bottom:24px}
.field{display:grid;gap:8px;margin-bottom:18px}
.field label{font-weight:700;font-size:.93rem}
.field .opt{font-weight:400;color:var(--ink-2)}
.field input,.field select,.field textarea{width:100%;min-height:54px;padding:.7rem 1rem;background:var(--bg-2);border:2px solid var(--line);border-radius:var(--r-sm);transition:border-color .2s,background-color .2s}
.field textarea{min-height:104px;resize:vertical;line-height:1.5}
.field select{appearance:none;-webkit-appearance:none;padding-right:2.6rem;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23135CA0' stroke-width='2'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center}
.field input:hover,.field select:hover,.field textarea:hover{border-color:#BFD2E6}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--sky);background-color:#fff;outline:none;box-shadow:0 0 0 4px rgba(46,163,221,.18)}
.field [aria-invalid="true"]{border-color:var(--error)}
.field .err{color:var(--error);font-size:.9rem}
.field .err:empty{display:none}
.row-2{display:grid;gap:0 14px}
@media(min-width:560px){.row-2{grid-template-columns:1fr 1fr}}
.hp{position:absolute!important;left:-9999px;width:1px;height:1px;overflow:hidden}
.consent{font-size:.86rem;color:var(--ink-2);margin:2px 0 20px}
.form-shell .btn[type=submit]{width:100%}
.form-status{margin-top:18px;padding:16px 18px;border-radius:var(--r-sm);font-size:.96rem;display:none}
.form-status[data-state]{display:block}
.form-status[data-state="ok"]{background:#E7F7EF;color:#14532D;border:1px solid #A7DDBF}
.form-status[data-state="error"]{background:#FDEEEE;color:#7A1A14;border:1px solid #F3BDBD}
.form-status .actions{margin-top:12px}
.btn[disabled]{opacity:.6;cursor:progress}

/* ---------- Trang trong ---------- */
.page-hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#F1F8FE 0%,#FFFFFF 100%);padding-block:clamp(28px,4vw,56px) clamp(56px,7vw,96px)}
.page-hero .wrap{position:relative}
.ph-grid{display:grid;gap:36px;align-items:center}
@media(min-width:960px){.ph-grid.has-media{grid-template-columns:minmax(0,6fr) minmax(0,5fr)}}
.ph-media{position:relative;border-radius:28px;overflow:hidden;aspect-ratio:4/3;box-shadow:var(--shadow);transform:rotate(1.5deg)}
.ph-media img{width:100%;height:100%;object-fit:cover;object-position:var(--fp,50% 50%)}
.ph-media .ph-badge{position:absolute;left:16px;top:16px;display:grid;place-items:center;width:84px;height:84px;border-radius:24px;background:var(--c,var(--orange));color:#fff}
.ph-media .ph-badge .art{width:54px}
.page-hero h1{font-size:clamp(2.4rem,5.4vw,4.4rem);line-height:1.05;letter-spacing:-.04em;color:var(--blue);max-width:16ch}
.page-hero .lead{margin-top:clamp(18px,2.4vw,26px)}
.page-hero .actions{margin-top:clamp(24px,3vw,32px)}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:.88rem;color:var(--ink-2);margin-bottom:clamp(18px,2.5vw,28px)}
.crumbs a{color:var(--blue);text-decoration:none;font-weight:600}
.crumbs a:hover{text-decoration:underline}
.crumbs li+li::before{content:"/";margin-right:8px;opacity:.5}
.two-col{display:grid;gap:clamp(24px,4vw,64px)}
@media(min-width:900px){.two-col{grid-template-columns:minmax(0,4fr) minmax(0,7fr)}}
.checks{display:grid;gap:12px}
.checks li{position:relative;padding:16px 18px 16px 58px;border-radius:var(--r-sm);background:var(--bg-2);font-weight:600}
.checks li::before{content:"";position:absolute;left:18px;top:50%;width:26px;height:26px;margin-top:-13px;border-radius:50%;background:var(--orange) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 12.5l4 4 8-9' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat}
.features{display:grid;gap:18px}
@media(min-width:700px){.features{grid-template-columns:1fr 1fr}}
.feature{background:#fff;border-radius:var(--r);padding:clamp(24px,3vw,34px);display:grid;gap:10px;align-content:start;border:1px solid var(--line)}
.feature p{color:var(--ink-2)}
.feature:nth-child(1){--c:var(--orange)}
.feature:nth-child(2){--c:var(--sky)}
.feature:nth-child(3){--c:var(--blue)}
.feature:nth-child(4){--c:var(--mint)}
.note-box{display:flex;gap:14px;align-items:flex-start;background:var(--orange-soft);border-radius:var(--r-sm);padding:18px 22px;max-width:70ch}
.note-box .star{color:var(--orange);width:20px;height:20px;margin-top:4px}
.compare-wrap{overflow-x:auto;border-radius:var(--r);border:1px solid var(--line);background:#fff}
.compare{width:100%;border-collapse:collapse;min-width:720px}
.compare th,.compare td{padding:20px 22px;text-align:left;vertical-align:top;border-top:1px solid var(--line)}
.compare thead th{border-top:0;font-family:var(--font-display);font-weight:800;font-size:1.3rem;color:#fff;background:var(--c)}
.compare thead th a{text-decoration:none}
.compare thead td{background:var(--bg-2)}
.compare tbody th{width:18%;font-weight:700;color:var(--blue);background:var(--bg-2)}
.levels{display:grid;gap:12px}
.level{display:grid;gap:6px;padding:20px 24px;border-radius:var(--r-sm);background:var(--bg-2)}
@media(min-width:760px){.level{grid-template-columns:minmax(0,3fr) minmax(0,6fr) minmax(0,3fr);gap:28px;align-items:baseline}}
.more-links{display:grid;gap:16px}
@media(min-width:760px){.more-links{grid-template-columns:1fr 1fr}}
.more-links a{display:flex;justify-content:space-between;align-items:center;padding:24px 28px;border-radius:var(--r);background:var(--c);color:#fff;text-decoration:none;font-family:var(--font-display);font-weight:800;font-size:1.6rem;letter-spacing:-.03em;transition:transform .25s var(--ease)}
.more-links a::after{content:"";width:10px;height:10px;border-top:2.5px solid currentColor;border-right:2.5px solid currentColor;transform:rotate(45deg);transition:transform .25s}
.more-links a:hover{transform:translateY(-3px)}
.more-links a:hover::after{transform:translateX(5px) rotate(45deg)}

/* ---------- Footer ---------- */
.site-footer{background:var(--blue-deep);color:rgba(255,255,255,.75);padding-block:clamp(56px,7vw,88px) 28px}
.site-footer a{color:#fff;text-decoration:none}
.site-footer a:hover{color:var(--orange)}
.foot-grid{display:grid;gap:40px}
@media(min-width:900px){.foot-grid{grid-template-columns:minmax(0,5fr) minmax(0,3fr) minmax(0,4fr)}}
.foot-brand img{height:56px;width:auto}
.foot-slogan{font-family:var(--font-display);font-weight:800;font-size:1.5rem;letter-spacing:-.03em;color:#fff;margin:22px 0 10px;line-height:1.15}
.foot-slogan span{color:var(--orange)}
.site-footer h2{font-family:var(--font-display);font-size:1rem;font-weight:800;letter-spacing:0;color:#fff;margin-bottom:14px}
.foot-nav li+li{margin-top:9px}
.foot-contact{display:grid;gap:10px;font-style:normal}
.foot-bottom{margin-top:clamp(40px,6vw,64px);padding-top:22px;border-top:1px solid rgba(255,255,255,.14);font-size:.88rem;color:rgba(255,255,255,.55)}

/* ---------- Thanh CTA mobile ---------- */
.mobile-bar{display:none}
@media(max-width:759px){
  body{padding-bottom:calc(76px + env(safe-area-inset-bottom,0px))}
  .mobile-bar{position:fixed;left:0;right:0;bottom:0;z-index:40;display:grid;grid-template-columns:1fr 1.5fr;gap:10px;padding:10px var(--gutter) calc(10px + env(safe-area-inset-bottom,0px));background:rgba(255,255,255,.97);border-top:1px solid var(--line);box-shadow:0 -10px 30px -20px rgba(15,36,64,.4)}
  .mobile-bar .btn{min-height:50px;padding-inline:.9rem;font-size:.96rem}
  body.nav-open .mobile-bar{display:none}
  .hero .actions .btn{flex:1 1 100%}
}

/* ---------- 404 ---------- */
.nf{min-height:60vh;display:grid;align-content:center;gap:22px;padding-block:80px}
.nf h1{font-size:clamp(2.6rem,7vw,4.6rem);line-height:1.05;color:var(--blue)}

/* ---------- Motion ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
@media print{.site-header,.mobile-bar{display:none}}

.brand-band .orbit.o2{left:auto;right:-12%;bottom:-55%;opacity:.22}
@media(max-width:700px){.orbit{display:none}}

/* ---------- v4.1: nỗi đau khách hàng, FAQ, bản đồ, Zalo ---------- */
.program-pain{display:inline-block;justify-self:start;font-family:var(--font-display);font-weight:700;font-size:.95rem;color:var(--c-text,var(--blue));background:color-mix(in srgb,var(--c) 12%,#fff);padding:6px 12px;border-radius:12px 12px 12px 2px}
.faq{display:grid;gap:12px}
.faq-item{background:var(--bg-2);border-radius:var(--r-sm);border:1px solid var(--line);transition:background-color .2s}
.faq-item[open]{background:#fff;box-shadow:0 18px 40px -30px rgba(15,36,64,.45)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;font-family:var(--font-display);font-weight:800;font-size:1.08rem;color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"";flex:none;width:30px;height:30px;border-radius:50%;background:var(--orange-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 6v12M6 12h12' stroke='%23E08A00' stroke-width='2.5' stroke-linecap='round'/%3E%3C/svg%3E") center/16px no-repeat;transition:transform .3s var(--ease)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 22px 20px;color:var(--ink-2);max-width:62ch}
.map-section{padding-block:0 clamp(72px,9vw,120px);background:linear-gradient(135deg,var(--sky-soft) 0%,#FFF6E6 100%)}
.register+.map-section{margin-top:0}
.map-box{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);background:#DDE9F5;min-height:380px}
.map-frame{display:block;width:100%;height:clamp(360px,42vw,460px);border:0}
.map-fallback{display:grid;place-items:center;height:clamp(300px,36vw,420px);text-align:center;padding:24px;color:var(--ink-2)}
.map-card{position:absolute;left:18px;bottom:18px;display:flex;gap:14px;align-items:flex-start;background:#fff;border-radius:var(--r-sm);padding:16px 18px;max-width:min(360px,calc(100% - 36px));box-shadow:0 18px 40px -24px rgba(15,36,64,.6);--c:var(--orange)}
.map-card .icon{width:44px;height:44px;border-radius:14px;margin:0;flex:none}
.map-card .icon .art{width:24px;height:24px}
.map-card .label{font-size:.82rem;font-weight:700;color:var(--ink-2)}
.map-card .big{font-family:var(--font-display);font-weight:800;line-height:1.3;margin-bottom:10px}
.zalo-float{position:fixed;right:18px;bottom:22px;z-index:45;display:grid;place-items:center;width:58px;height:58px;border-radius:50%;background:#0068FF;color:#fff;text-decoration:none;font-weight:800;font-size:.85rem;box-shadow:0 14px 30px -12px rgba(0,104,255,.8);transition:transform .2s var(--ease)}
.zalo-float:hover{transform:scale(1.08)}
.zalo-float::before{content:"";position:absolute;inset:-6px;border-radius:50%;border:2px solid rgba(0,104,255,.35);animation:pulse 2.4s ease-out infinite}
@keyframes pulse{0%{transform:scale(.9);opacity:1}100%{transform:scale(1.35);opacity:0}}
@media(max-width:759px){.zalo-float{bottom:calc(84px + env(safe-area-inset-bottom,0px));right:14px;width:52px;height:52px}}
body.nav-open .zalo-float{display:none}
.teachers{display:grid;gap:18px}
@media(min-width:700px){.teachers{grid-template-columns:repeat(3,1fr)}}
.teacher{background:#fff;border-radius:var(--r);padding:24px;border:1px solid var(--line);display:grid;gap:6px}
.teacher img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:var(--r-sm);margin-bottom:10px}
.teacher .role{color:var(--orange-deep);font-weight:700}
.quotes{display:grid;gap:18px}
@media(min-width:800px){.quotes{grid-template-columns:repeat(3,1fr)}}
.quote-card{background:#fff;border-radius:var(--r);padding:26px;border:1px solid var(--line);display:grid;gap:14px}
.quote-card figcaption{color:var(--ink-2);font-size:.92rem}