/* =========================================================
   Sáng Tạo Edu — style.css
   Phong cách: trẻ trung, màu tươi (playful). Xanh dương + cam + vàng,
   Nunito tròn đậm, nhiều hình khối blob, badge màu, icon to, bo góc lớn.
   Bố cục khác các mẫu trước:
     - Header ngang có thanh thông báo màu cam + nút nổi
     - Hero BLOB + ảnh cắt hình tròn lệch, không phải ảnh nền tràn
     - Khóa học dạng BĂNG CUỘN NGANG có badge cấp độ
     - Lộ trình dạng TAB
     - Testimonial dạng BONG BÓNG CHAT
     - FAQ accordion bằng <details>
     - Lịch khai giảng dạng BẢNG
   Ảnh: mỗi khối ảnh dùng biến --img trên thẻ HTML (link trực tiếp Wikimedia/Flickr, xem CREDITS.md).
   ========================================================= */

:root{
  --blue:#2F6FED;
  --blue-deep:#1F4FB5;
  --blue-soft:#E4EDFF;
  --orange:#FF8A3D;
  --orange-deep:#E5702A;
  --orange-soft:#FFEBDD;
  --yellow:#FFC93C;
  --yellow-soft:#FFF4D1;
  --green:#3DBE7A;
  --green-soft:#DFF5E8;
  --pink:#F25F8A;
  --pink-soft:#FDE4EC;
  --bg:#FFFFFF;
  --bg-2:#F3F7FF;
  --line:#E3E9F5;
  --text:#1E2A44;
  --muted:#6B7690;
  --radius:16px;
  --radius-lg:28px;
  --shadow:0 2px 4px rgba(30,42,68,.04), 0 12px 32px rgba(30,42,68,.08);
  --shadow-lg:0 24px 60px rgba(47,111,237,.18);
  --ph:linear-gradient(135deg,#E4EDFF 0%,#CFE0FF 55%,#B9D2FF 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(--bg);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:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2.2;
  stroke-linecap:round;stroke-linejoin:round;flex:none}
.ph{background:var(--img,var(--ph)) center/cover no-repeat,var(--ph)}
.container{width:min(1200px,100% - 40px);margin-inline:auto}
h1,h2,h3,h4,.h{font-family:'Nunito','Be Vietnam Pro',sans-serif;font-weight:800;line-height:1.2}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 26px;border-radius:999px;
  font-family:'Nunito',sans-serif;font-weight:800;font-size:15px;transition:.2s;white-space:nowrap}
.btn svg{width:17px;height:17px}
.btn--blue{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(47,111,237,.3)}
.btn--blue:hover{background:var(--blue-deep);transform:translateY(-2px)}
.btn--orange{background:var(--orange);color:#fff;box-shadow:0 8px 20px rgba(255,138,61,.35)}
.btn--orange:hover{background:var(--orange-deep);transform:translateY(-2px)}
.btn--yellow{background:var(--yellow);color:var(--text)}
.btn--yellow:hover{background:#F5BD2A}
.btn--line{border:2px solid var(--line);color:var(--text);background:#fff}
.btn--line:hover{border-color:var(--blue);color:var(--blue)}
.btn--sm{padding:10px 18px;font-size:13.5px}

/* ---------- Thanh thông báo ---------- */
.notice{background:var(--orange);color:#fff;font-size:13.5px;font-weight:600;text-align:center;padding:9px 16px}
.notice b{background:#fff;color:var(--orange-deep);padding:2px 10px;border-radius:999px;margin-right:8px;font-size:12px}
.notice a{text-decoration:underline;margin-left:6px}

/* ---------- Header ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header__in{display:flex;align-items:center;gap:24px;min-height:76px}
.logo{display:flex;align-items:center;gap:11px}
.logo__mark{width:44px;height:44px;border-radius:14px;background:var(--blue);display:grid;place-items:center;color:#fff;
  font-family:'Nunito',sans-serif;font-weight:900;font-size:20px;transform:rotate(-6deg);box-shadow:0 6px 14px rgba(47,111,237,.3)}
.logo__text b{display:block;font-family:'Nunito',sans-serif;font-weight:900;font-size:21px;line-height:1;color:var(--blue-deep)}
.logo__text small{display:block;font-size:10px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted);font-weight:600;margin-top:3px}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav__link{padding:9px 14px;border-radius:999px;font-family:'Nunito',sans-serif;font-weight:700;font-size:14.5px;color:var(--text);transition:.15s}
.nav__link:hover{background:var(--blue-soft);color:var(--blue)}
.nav__link.is-active{background:var(--blue);color:#fff}
.header__cta{display:flex;align-items:center;gap:10px}
.burger{display:none;width:44px;height:44px;border-radius:14px;place-items:center;background:var(--blue-soft);color:var(--blue)}

/* ---------- Hero blob ---------- */
.hero{position:relative;overflow:hidden;padding:70px 0 40px}
.hero__in{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
.pill{display:inline-flex;align-items:center;gap:8px;padding:7px 14px 7px 8px;border-radius:999px;background:var(--yellow-soft);
  font-size:13px;font-weight:700;color:var(--text)}
.pill span{background:var(--yellow);border-radius:999px;padding:3px 10px;font-size:11.5px;font-family:'Nunito',sans-serif;font-weight:800}
.hero h1{font-size:clamp(38px,5.2vw,64px);margin:20px 0 16px;letter-spacing:-.5px}
.hero h1 .u{position:relative;display:inline-block;color:var(--blue)}
.hero h1 .u::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:12px;background:var(--yellow);z-index:-1;border-radius:6px;transform:rotate(-1.5deg)}
.hero h1 .o{color:var(--orange)}
.hero p{font-size:17px;color:var(--muted);max-width:520px}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero__proof{display:flex;align-items:center;gap:22px;margin-top:34px;flex-wrap:wrap}
.hero__proof .faces{display:flex}
.hero__proof .faces .ph{width:40px;height:40px;border-radius:50%;border:3px solid #fff;margin-left:-12px;box-shadow:var(--shadow)}
.hero__proof .faces .ph:first-child{margin-left:0}
.hero__proof b{font-family:'Nunito',sans-serif;font-weight:800;font-size:16px}
.hero__proof small{display:block;color:var(--muted);font-size:12.5px}
.stars{color:var(--yellow);letter-spacing:2px;font-size:14px}

.hero__art{position:relative;aspect-ratio:1;max-width:540px;justify-self:end;width:100%}
.blob{position:absolute;inset:6% 4% 4% 6%;background:var(--blue);
  border-radius:58% 42% 61% 39% / 47% 55% 45% 53%;animation:blob 9s ease-in-out infinite}
.blob--2{inset:20% -4% -2% 30%;background:var(--orange);opacity:.9;border-radius:40% 60% 45% 55% / 55% 40% 60% 45%;animation-delay:-4s}
@keyframes blob{0%,100%{border-radius:58% 42% 61% 39% / 47% 55% 45% 53%}50%{border-radius:45% 55% 40% 60% / 55% 45% 60% 40%}}
.hero__art .ph{position:absolute;inset:12% 10% 10% 12%;border-radius:50% 50% 50% 12%;border:8px solid #fff;box-shadow:var(--shadow-lg)}
.float{position:absolute;background:#fff;border-radius:var(--radius);padding:12px 16px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:12px;animation:float 5s ease-in-out infinite}
.float .ic{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;flex:none}
.float b{display:block;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px;line-height:1.2}
.float small{color:var(--muted);font-size:12px}
.float--1{left:-6%;top:18%}
.float--2{right:-4%;bottom:14%;animation-delay:-2.5s}
.float--3{left:6%;bottom:2%;animation-delay:-1s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.deco{position:absolute;pointer-events:none}
.deco--dots{width:120px;height:120px;background:radial-gradient(var(--line) 2px,transparent 2.5px) 0 0/16px 16px;right:0;top:40px}
.deco--ring{width:80px;height:80px;border:10px solid var(--yellow-soft);border-radius:50%;left:-20px;bottom:60px}

/* ---------- Đối tác / tin cậy ---------- */
.trust{border-block:1px solid var(--line);padding:24px 0}
.trust__in{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.trust__in > span{font-size:13px;color:var(--muted);font-weight:600}
.trust__logos{display:flex;gap:34px;flex-wrap:wrap;font-family:'Nunito',sans-serif;font-weight:900;font-size:15px;color:#B8C1D6;letter-spacing:1px}

/* ---------- Section ---------- */
.section{padding:90px 0}
.section--soft{background:var(--bg-2)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;font-size:12px;font-weight:800;
  font-family:'Nunito',sans-serif;background:var(--blue-soft);color:var(--blue);text-transform:uppercase;letter-spacing:1px}
.eyebrow--o{background:var(--orange-soft);color:var(--orange-deep)}
.eyebrow--g{background:var(--green-soft);color:#237A4E}
.eyebrow--p{background:var(--pink-soft);color:var(--pink)}
.section__title{font-size:clamp(28px,3.6vw,44px);margin-top:14px;letter-spacing:-.4px}
.section__title .o{color:var(--orange)}
.section__title .b{color:var(--blue)}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:40px}
.section__head--c{flex-direction:column;align-items:center;text-align:center}
.section__head p{color:var(--muted);max-width:520px;font-size:16px;margin-top:10px}

/* ---------- Danh mục lớp (ô màu) ---------- */
.cats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat{border-radius:var(--radius-lg);padding:28px 26px;display:flex;flex-direction:column;gap:12px;transition:.25s;min-height:190px}
.cat:hover{transform:translateY(-6px) rotate(-1deg);box-shadow:var(--shadow-lg)}
.cat .ic{width:54px;height:54px;border-radius:18px;background:#fff;display:grid;place-items:center;box-shadow:var(--shadow)}
.cat .ic svg{width:26px;height:26px}
.cat b{font-family:'Nunito',sans-serif;font-weight:800;font-size:19px;margin-top:auto}
.cat small{font-size:13px;color:var(--muted)}
.cat--blue{background:var(--blue-soft)}.cat--blue .ic{color:var(--blue)}
.cat--orange{background:var(--orange-soft)}.cat--orange .ic{color:var(--orange)}
.cat--green{background:var(--green-soft)}.cat--green .ic{color:var(--green)}
.cat--pink{background:var(--pink-soft)}.cat--pink .ic{color:var(--pink)}

/* ---------- Băng khóa học cuộn ngang ---------- */
.band{margin-inline:calc(50% - 50vw);padding-inline:calc(50vw - 50%);overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none}
.band::-webkit-scrollbar{display:none}
.band__track{display:flex;gap:22px;padding:8px 0 30px;width:max-content}
.course{width:320px;flex:none;scroll-snap-align:start;background:#fff;border-radius:var(--radius-lg);padding:12px;box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column}
.course:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px)}
.course__media{position:relative;aspect-ratio:16/10;border-radius:calc(var(--radius-lg) - 8px);overflow:hidden}
.course__media .ph{position:absolute;inset:0}
.lvl{position:absolute;top:12px;left:12px;padding:5px 12px;border-radius:999px;font-family:'Nunito',sans-serif;font-weight:800;font-size:11.5px;color:#fff;background:var(--blue)}
.lvl--o{background:var(--orange)}.lvl--g{background:var(--green)}.lvl--p{background:var(--pink)}.lvl--y{background:var(--yellow);color:var(--text)}
.course__body{padding:18px 10px 10px;display:flex;flex-direction:column;flex:1}
.course__body h3{font-size:19px}
.course__meta{display:flex;gap:14px;color:var(--muted);font-size:12.5px;margin:8px 0 14px;flex-wrap:wrap}
.course__meta span{display:flex;align-items:center;gap:5px}
.course__meta svg{width:14px;height:14px;color:var(--blue)}
.course__foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:14px;border-top:1px dashed var(--line)}
.course__price{font-family:'Nunito',sans-serif;font-weight:900;font-size:19px;color:var(--blue)}
.course__price s{color:var(--muted);font-weight:600;font-size:13px;margin-right:6px}
.band__nav{display:flex;gap:8px}
.band__nav button{width:44px;height:44px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;transition:.15s}
.band__nav button:hover{border-color:var(--blue);color:var(--blue)}

/* ---------- Lộ trình dạng tab ---------- */
.tabs{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:40px}
.tabs button{padding:11px 22px;border-radius:999px;border:2px solid var(--line);font-family:'Nunito',sans-serif;font-weight:800;font-size:14px;color:var(--muted);background:#fff;transition:.15s}
.tabs button.is-active{background:var(--blue);border-color:var(--blue);color:#fff}
.tabpane{display:none}
.tabpane.is-active{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.tabpane .ph{aspect-ratio:4/3;border-radius:var(--radius-lg)}
.tabpane h3{font-size:28px}
.tabpane > div > p{color:var(--muted);margin-top:12px}
.steps{display:grid;gap:14px;margin:24px 0}
.step{display:flex;gap:14px;align-items:flex-start}
.step span{width:34px;height:34px;border-radius:12px;background:var(--orange-soft);color:var(--orange-deep);display:grid;place-items:center;font-family:'Nunito',sans-serif;font-weight:900;flex:none}
.step b{display:block;font-family:'Nunito',sans-serif;font-weight:800}
.step small{color:var(--muted);font-size:13px}

/* ---------- Số liệu ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{background:#fff;border-radius:var(--radius-lg);padding:30px 24px;text-align:center;box-shadow:var(--shadow);position:relative;overflow:hidden}
.stat::before{content:"";position:absolute;width:90px;height:90px;border-radius:50%;right:-30px;top:-30px;background:var(--blue-soft)}
.stat:nth-child(2)::before{background:var(--orange-soft)}.stat:nth-child(3)::before{background:var(--green-soft)}.stat:nth-child(4)::before{background:var(--pink-soft)}
.stat b{display:block;font-family:'Nunito',sans-serif;font-weight:900;font-size:44px;line-height:1;color:var(--blue);position:relative}
.stat:nth-child(2) b{color:var(--orange)}.stat:nth-child(3) b{color:var(--green)}.stat:nth-child(4) b{color:var(--pink)}
.stat span{display:block;margin-top:8px;color:var(--muted);font-size:13.5px;font-weight:600;position:relative}

/* ---------- Giảng viên ---------- */
.teachers{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.teacher{text-align:center}
.teacher .ph{aspect-ratio:1;border-radius:var(--radius-lg);position:relative}
.teacher .ph::after{content:attr(data-tag);position:absolute;left:50%;bottom:-12px;transform:translateX(-50%);background:var(--yellow);
  padding:5px 12px;border-radius:999px;font-family:'Nunito',sans-serif;font-weight:800;font-size:11.5px;white-space:nowrap}
.teacher b{display:block;font-family:'Nunito',sans-serif;font-weight:800;font-size:18px;margin-top:26px}
.teacher small{display:block;color:var(--blue);font-weight:600;font-size:13px}
.teacher p{color:var(--muted);font-size:13px;margin-top:8px}

/* ---------- Bong bóng chat ---------- */
.chat{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.bubble{position:relative;background:#fff;border-radius:var(--radius-lg) var(--radius-lg) var(--radius-lg) 6px;padding:26px 26px 22px;box-shadow:var(--shadow)}
.bubble::before{content:"";position:absolute;left:0;bottom:-14px;border:14px solid transparent;border-top-color:#fff;border-left-color:#fff;border-radius:0 0 0 6px}
.bubble p{font-size:15px}
.bubble__who{display:flex;align-items:center;gap:12px;margin-top:26px;padding-left:4px}
.bubble__who .ph{width:44px;height:44px;border-radius:50%;border:3px solid var(--yellow-soft)}
.bubble__who b{display:block;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px}
.bubble__who small{color:var(--muted);font-size:12px}
.chat > div:nth-child(2) .bubble{background:var(--blue);color:#fff}
.chat > div:nth-child(2) .bubble::before{border-top-color:var(--blue);border-left-color:var(--blue)}
.chat > div:nth-child(2) .bubble__who small{color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin-inline:auto}
.faq details{background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:18px 24px;margin-bottom:12px;transition:.2s}
.faq details[open]{border-color:var(--blue)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:14px;font-family:'Nunito',sans-serif;font-weight:800;font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary span{width:30px;height:30px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;flex:none;transition:.2s;font-size:20px}
.faq details[open] summary span{transform:rotate(45deg);background:var(--blue);color:#fff}
.faq details p{color:var(--muted);margin-top:12px;font-size:14.5px}

/* ---------- CTA lớn ---------- */
.cta{background:var(--blue);color:#fff;border-radius:var(--radius-lg);padding:60px;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.08);right:-80px;top:-120px}
.cta::after{content:"";position:absolute;width:180px;height:180px;border-radius:50%;background:var(--orange);opacity:.9;right:120px;bottom:-100px}
.cta > *{position:relative;z-index:1}
.cta h2{font-size:34px}
.cta p{opacity:.85;margin-top:10px;font-size:16px}
.cta__form{background:#fff;border-radius:var(--radius);padding:24px;color:var(--text);display:grid;gap:10px}
.cta__form input,.cta__form select{border:2px solid var(--line);border-radius:12px;padding:12px 14px;font:inherit;outline:none}
.cta__form input:focus{border-color:var(--blue)}

/* ---------- Banner trang con ---------- */
.pagehead{background:var(--bg-2);padding:70px 0 60px;position:relative;overflow:hidden}
.pagehead::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:var(--yellow-soft);right:-120px;top:-200px}
.pagehead::after{content:"";position:absolute;width:200px;height:200px;border-radius:50%;background:var(--blue-soft);left:-60px;bottom:-100px}
.pagehead__in{position:relative;z-index:1}
.pagehead h1{font-size:clamp(34px,5vw,58px);margin-top:16px;letter-spacing:-.5px}
.pagehead p{color:var(--muted);max-width:600px;margin-top:14px;font-size:16px}
.crumbs{display:flex;gap:10px;font-size:13px;color:var(--muted);margin-top:18px;font-weight:600}

/* ---------- Lưới khóa học ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid .course{width:auto}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:34px}
.filters a{padding:9px 18px;border-radius:999px;border:2px solid var(--line);font-family:'Nunito',sans-serif;font-weight:800;font-size:13.5px;color:var(--muted);background:#fff}
.filters .is-active,.filters a:hover{background:var(--orange);border-color:var(--orange);color:#fff}

/* ---------- Bảng lịch khai giảng ---------- */
.sched{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);font-size:14px}
.sched th{background:var(--blue);color:#fff;text-align:left;padding:16px 18px;font-family:'Nunito',sans-serif;font-weight:800;font-size:13px}
.sched td{padding:15px 18px;border-bottom:1px solid var(--line);vertical-align:middle}
.sched tr:last-child td{border-bottom:0}
.sched tr:hover td{background:var(--bg-2)}
.sched td b{font-family:'Nunito',sans-serif;font-weight:800}
.seat{display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:700}
.seat--ok{background:var(--green-soft);color:#237A4E}.seat--few{background:var(--orange-soft);color:var(--orange-deep)}.seat--full{background:var(--line);color:var(--muted)}

/* ---------- Chi tiết khóa học ---------- */
.detail{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:50px;align-items:start}
.detail__side{position:sticky;top:96px}
.buybox{background:#fff;border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow-lg);border:2px solid var(--blue-soft)}
.buybox .ph{aspect-ratio:16/10;border-radius:var(--radius)}
.buybox .course__price{font-size:30px;margin-top:18px;display:block}
.buybox ul{list-style:none;display:grid;gap:9px;margin:18px 0;font-size:13.5px}
.buybox li{display:flex;gap:10px;align-items:center}
.buybox li svg{width:16px;height:16px;color:var(--green)}
.buybox .btn{width:100%}
.detail h2{font-size:26px;margin:44px 0 14px}
.detail .body p{color:var(--muted);margin-bottom:14px}
.outcomes{display:grid;grid-template-columns:1fr 1fr;gap:12px;list-style:none}
.outcomes li{display:flex;gap:10px;align-items:flex-start;background:var(--bg-2);border-radius:var(--radius);padding:14px 16px;font-size:14px}
.outcomes svg{color:var(--green);margin-top:3px}
.syllabus details{border:2px solid var(--line);border-radius:var(--radius);padding:14px 20px;margin-bottom:10px}
.syllabus summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;font-family:'Nunito',sans-serif;font-weight:800;font-size:15px}
.syllabus summary::-webkit-details-marker{display:none}
.syllabus summary small{color:var(--muted);font-weight:600;font-size:12.5px}
.syllabus li{list-style:none;padding:8px 0;border-top:1px dashed var(--line);font-size:14px;display:flex;justify-content:space-between;color:var(--muted)}

/* ---------- Form ---------- */
.form{background:#fff;border-radius:var(--radius-lg);padding:40px;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:700}
.field input,.field select,.field textarea{border:2px solid var(--line);border-radius:12px;padding:12px 14px;font:inherit;outline:none;transition:.2s;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue)}
.field textarea{min-height:110px;resize:vertical}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips label{display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border:2px solid var(--line);border-radius:999px;font-size:13.5px;font-weight:600;cursor:pointer}
.chips input{accent-color:var(--blue)}

/* ---------- Liên hệ ---------- */
.contact{display:grid;grid-template-columns:1fr 1.2fr;gap:50px}
.contact__list{display:grid;gap:18px;margin-top:26px}
.contact__list div{display:flex;gap:14px;background:#fff;border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.contact__list .ic{width:44px;height:44px;border-radius:14px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;flex:none}
.contact__list b{display:block;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px}
.contact__list span{color:var(--muted);font-size:13.5px}
.map{aspect-ratio:16/7;border-radius:var(--radius-lg);margin-top:60px;filter:saturate(.5)}

/* ---------- Footer ---------- */
.footer{background:var(--text);color:#fff;padding:70px 0 0;margin-top:60px;border-radius:var(--radius-lg) var(--radius-lg) 0 0}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.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:16px;max-width:320px}
.footer__col h4{font-size:13px;letter-spacing:1.5px;text-transform:uppercase;color:var(--yellow);margin-bottom:18px}
.footer__col a{display:block;padding:5px 0;font-size:14px;opacity:.85}
.footer__col a:hover{color:var(--yellow);opacity:1}
.footer__col li{list-style:none;display:flex;gap:10px;padding:5px 0;font-size:14px;opacity:.85}
.footer__col svg{width:16px;height:16px;color:var(--yellow);margin-top:4px}
.footer__bar{margin-top:50px;border-top:1px solid rgba(255,255,255,.1);padding:20px 0;font-size:13px;opacity:.6}
.footer__bar-in{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* ---------- Responsive ---------- */
@media (max-width:1100px){
  .cats,.teachers,.stats{grid-template-columns:repeat(2,1fr)}
  .chat,.grid{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr}
  .detail{grid-template-columns:1fr}
  .detail__side{position:static}
}
@media (max-width:980px){
  .nav{display:none}
  .nav.is-open{display:flex;position:fixed;inset:76px 0 auto 0;flex-direction:column;align-items:stretch;background:#fff;padding:12px 20px 20px;box-shadow:var(--shadow-lg);z-index:60}
  .nav.is-open .nav__link{padding:13px 16px;border-radius:12px}
  .burger{display:grid;margin-left:auto}
  .header__cta .btn{display:none}
  .hero{padding:44px 0 30px}
  .hero__in{grid-template-columns:1fr;gap:40px}
  .hero__art{justify-self:center;max-width:440px}
  .tabpane.is-active{grid-template-columns:1fr}
  .cta{grid-template-columns:1fr;padding:40px 28px}
  .contact{grid-template-columns:1fr}
}
@media (max-width:900px){
  .section__head{flex-direction:column;align-items:flex-start;gap:14px}
  .section__head--c{align-items:center}
}
@media (max-width:640px){
  .container{width:min(1200px,100% - 32px)}
  .section{padding:60px 0}
  .cats,.teachers,.stats,.chat,.grid,.outcomes{grid-template-columns:1fr}
  .form{padding:26px 20px}
  .form__grid{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr}
  .course{width:270px}
  .float--1{left:0}.float--2{right:0}
  .sched{font-size:13px}
  .sched th,.sched td{padding:12px 10px}
  .trust__logos{gap:18px;font-size:13px}
}