/* Trang Tiếng Anh học thuật - IELTS (bản thử theo phong cách cbcentres.com) — chỉ phần nội dung, prefix .iel */
.iel{--red:#d10f26;--red-d:#9f2323;--navy:#1d2a6e;--ink:#3b3635;--muted:#6e6e6e;--gray:#f6f6f6;--pink:#fdecee;
  --r:28px;font-family:'Be Vietnam Pro',sans-serif;color:var(--muted);font-size:17px;line-height:1.65;overflow-x:clip}
.iel *,.iel *::before,.iel *::after{box-sizing:border-box}
.iel p{margin:0}
.iel-wrap{max-width:1200px;margin:0 auto;padding:0 16px;position:relative}
.iel-sec{padding:60px 0;position:relative}

/* Tiêu đề 2 tông + nét vẽ tay */
.iel-title{position:relative;text-align:center;margin:0 auto 36px;line-height:1.2;font-weight:900;width:fit-content;max-width:100%}
.iel-title span{display:inline;font-size:clamp(28px,3.4vw,44px);color:var(--navy)}
.iel-title em{display:inline;font-style:normal;font-weight:800;font-size:clamp(20px,2.2vw,30px);color:var(--red);margin-left:.3em}
.iel-title::after{content:'';position:absolute;top:-14px;right:-26px;width:26px;height:24px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 26 24' fill='none' stroke='%23d10f26' stroke-width='2.6' stroke-linecap='round'%3E%3Cpath d='M4 20 2 13M10 17l1-11M16 19l7-7'/%3E%3C/svg%3E") no-repeat center/contain}
.iel-title--left{margin-left:0;text-align:left}
.iel-sub{text-align:center;max-width:760px;margin:-20px auto 32px}
.iel-sub--left{text-align:left;margin-left:0}

.iel-card{background:var(--gray);border-radius:var(--r);padding:28px 30px}
.iel-ghost{display:block;font-size:clamp(56px,6vw,84px);font-weight:900;line-height:.9;color:rgba(209,15,38,.12);letter-spacing:-.02em}
.iel-doodle{position:absolute;color:var(--red);font-size:64px;opacity:.85;pointer-events:none}

.iel-btn{display:inline-flex;align-items:center;gap:10px;padding:14px 28px;border-radius:999px;background:var(--red);
  color:#fff;font-weight:700;font-size:15px;text-decoration:none;text-transform:uppercase;border:2px solid var(--red);transition:background .2s,color .2s}
.iel-btn:hover{background:var(--red-d);border-color:var(--red-d);color:#fff}
.iel-btn--ghost{background:transparent;color:var(--red)}
.iel-btn--ghost:hover{background:var(--red);color:#fff}

/* 1. Giới thiệu */
.iel-about__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:48px;align-items:center}
.iel-about .iel-title{margin-bottom:24px}
.iel-about .iel-title span{display:block}
.iel-about .iel-title em{display:inline-block;margin:10px 0 0;padding:6px 20px;border-radius:999px;background:var(--red);color:#fff;font-size:clamp(15px,1.5vw,20px)}
.iel-about .iel-title::after{top:-12px;right:-30px}
.iel-about__lead{display:flex;gap:12px;font-weight:700;color:var(--ink);font-size:19px;margin-bottom:14px!important}
.iel-about__lead i{color:var(--red);margin-top:5px;flex:0 0 auto}
.iel-about__card strong,.iel-about__card b{color:var(--ink)}
.iel-about__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.iel-about__art{position:relative;min-width:0}
.iel-about__art img{position:relative;z-index:1;width:100%;height:auto;display:block}
.iel-blob{position:absolute;z-index:0;inset:8% -4% -6% 4%;background:var(--pink);border-radius:46% 54% 40% 60%/55% 45% 55% 45%}
.iel-doodle--a{right:-10px;bottom:-30px;z-index:2}

/* 2. Tương lai mở rộng */
.iel-future{background:radial-gradient(520px 300px at 4% 8%,rgba(209,15,38,.07),transparent 70%),radial-gradient(600px 320px at 98% 22%,rgba(29,42,110,.06),transparent 70%)}
.iel-eyebrow{display:flex;align-items:center;gap:10px;width:fit-content;margin:0 auto 16px!important;padding:8px 22px;border-radius:999px;
  background:#e6ecfb;color:var(--navy);font-size:15px;font-weight:600;letter-spacing:.02em}
.iel-future .iel-title{margin-bottom:12px}
.iel-future .iel-title em{font-size:clamp(28px,3.4vw,44px);font-weight:900}
.iel-future .iel-sub{margin:0 auto 36px;font-size:18px;color:#5b6b9a}
.iel-future__grid{display:grid;grid-template-columns:565fr 466fr 524fr;gap:20px;align-items:stretch}
.iel-future__item{display:flex;flex-direction:column;background:#fff;border-radius:22px;overflow:hidden;
  box-shadow:0 10px 30px rgba(29,42,110,.08);transition:transform .3s,box-shadow .3s}
.iel-future__item:hover{transform:translateY(-6px);box-shadow:0 16px 36px rgba(29,42,110,.14)}
.iel-future__img{overflow:hidden}
.iel-future__img img{width:100%;height:auto;display:block;transition:transform .5s}
.iel-future__item:hover img{transform:scale(1.03)}
.iel-future__body{flex:1;display:flex;gap:14px;align-items:flex-start;padding:20px 20px 24px;margin-top:-14px;position:relative;background:#fff;border-radius:22px 22px 0 0}
.iel-future__icon{flex:0 0 64px;height:64px;border-radius:50%;background:var(--pink);display:grid;place-items:center;color:var(--red);font-size:28px}
.iel-future__body h3{margin:0 0 8px;font-size:19px;font-weight:800;color:var(--red);line-height:1.35}
.iel-future__body p{font-size:15.5px;line-height:1.55;color:#55607f}
.iel-perks{list-style:none;margin:36px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr)}
.iel-perks li{display:flex;align-items:center;gap:16px;padding:6px 20px}
.iel-perks li+li{border-left:1px solid #d9dce6}
.iel-perks i{font-size:40px;color:var(--red);flex:0 0 46px;text-align:center}
.iel-perks b{display:block;color:var(--navy);font-size:16px;line-height:1.35}
.iel-perks span{display:block;font-size:14.5px;color:#6b7390}

/* 3. Chi tiết chương trình */
.iel-detail{padding-bottom:20px}
.iel-detail__intro{max-width:920px;margin:0 auto;text-align:center;display:grid;gap:14px}
.iel-detail__intro b,.iel-detail__intro strong{color:var(--ink)}

/* 4. Đối tượng */
.iel-aud__panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;background:var(--gray);border-radius:40px;padding:48px}
.iel-aud__head{position:relative}
.iel-aud__head .iel-title span{font-size:clamp(24px,2.6vw,34px)}
.iel-aud__note{margin-top:14px!important}
.iel-aud__note--first{display:inline-block;background:#fff;border-left:4px solid var(--red);border-radius:0 14px 14px 0;padding:12px 16px;color:var(--ink);font-weight:600}
.iel-doodle--b{right:10px;bottom:0;font-size:80px;opacity:.6}
.iel-aud__list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.iel-aud__list li{position:relative;display:flex;align-items:center;min-height:64px;margin-left:24px;padding:12px 18px 12px 46px;
  background:#fff;border:1.5px dashed #c9c4c4;border-radius:14px;color:var(--ink)}
.iel-aud__no{position:absolute;left:-24px;top:50%;transform:translateY(-50%);width:50px;height:50px;border-radius:50%;
  display:grid;place-items:center;color:#fff;font-size:18px;font-weight:800;border:4px solid #fff;box-shadow:0 2px 8px rgba(0,0,0,.12)}
.iel-aud__list li:nth-child(5n+1) .iel-aud__no{background:#4b7bd8}
.iel-aud__list li:nth-child(5n+2) .iel-aud__no{background:#7cbd4a}
.iel-aud__list li:nth-child(5n+3) .iel-aud__no{background:#e0a92b}
.iel-aud__list li:nth-child(5n+4) .iel-aud__no{background:#e8742a}
.iel-aud__list li:nth-child(5n+5) .iel-aud__no{background:var(--red)}
.iel-aud__list b,.iel-aud__list strong{color:var(--navy)}

/* 5. Lộ trình ghim: các chặng trượt phải → trái theo cuộn (JS: assets/js/tieng-anh-hoc-thuat-ielts.js) */
.iel-road{position:relative;height:calc(var(--n) * 85vh);background:var(--gray)}
.iel-road__sticky{position:sticky;top:0;height:100vh;overflow:hidden}
.iel-road__prog{position:absolute;z-index:4;top:110px;left:50%;transform:translateX(-50%);width:min(560px,80vw);margin:0;padding:0;list-style:none;
  display:flex;justify-content:space-between}
.iel-road__prog::before,.iel-road__prog::after{content:'';position:absolute;left:11px;right:11px;top:10px;height:4px;border-radius:2px;background:#e1e3ea}
.iel-road__prog::after{right:auto;width:calc((100% - 22px) * var(--p,0));background:var(--red)}
.iel-road__prog li{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:8px}
.iel-road__prog i{width:24px;height:24px;border-radius:50%;background:#fff;border:4px solid #d5d8e2;transition:.35s}
.iel-road__prog b{font-size:15px;font-weight:800;color:#a7acbd;transition:.35s}
.iel-road__prog li.is-done i{background:var(--navy);border-color:var(--navy)}
.iel-road__prog li.is-active i{background:var(--red);border-color:#fff;box-shadow:0 0 0 4px var(--red),0 0 0 10px rgba(209,15,38,.15)}
.iel-road__prog li.is-done b{color:var(--navy)}
.iel-road__prog li.is-active b{color:var(--red)}
.iel-road__stage{position:absolute;inset:0}
.iel-road__slide{position:absolute;inset:0;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:5vw;
  padding:190px max(6vw,calc(50% - 600px)) 50px;backface-visibility:hidden;will-change:transform;transform:translate3d(100%,0,0)}
.iel-road__slide:first-child{transform:none}
.iel-road__text{position:relative}
.iel-road__text .iel-ghost{font-size:clamp(90px,11vw,160px);margin:0 0 -40px -6px;color:rgba(29,42,110,.08)}
.iel-road__label{position:relative;display:inline-block;padding:6px 16px;border-radius:999px;background:var(--navy);color:#fff;font-size:15px;font-weight:600}
.iel-road__score{position:relative;display:block;font-size:clamp(80px,10vw,140px);line-height:1;font-weight:900;color:var(--red);letter-spacing:-.03em;margin:10px 0 18px}
.iel-road__rows{display:grid;grid-template-columns:auto 1fr;gap:10px 18px;margin:0;max-width:520px;font-size:18px}
.iel-road__rows dt{font-weight:600;color:var(--muted)}
.iel-road__rows dt::after{content:':'}
.iel-road__rows dd{margin:0;font-weight:700;color:var(--ink)}
.iel-road__art{position:relative;height:min(56vh,440px)}
.iel-road__bars{position:absolute;inset:0 0 0 0;display:flex;align-items:flex-end;gap:6%;padding:0 4%;
  background:linear-gradient(transparent calc(100% - 2px),#d5d8e2 0)}
.iel-road__bars span{position:relative;flex:1;height:var(--h);border-radius:18px 18px 0 0;background:#e6e8ef;transition:background .4s}
.iel-road__bars span.is-done{background:var(--navy)}
.iel-road__bars span.is-on{background:var(--red);box-shadow:0 18px 40px rgba(209,15,38,.25)}
.iel-road__bars b{position:absolute;top:16px;left:0;right:0;text-align:center;font-size:clamp(18px,2vw,26px);font-weight:900;color:#a7acbd}
.iel-road__bars .is-done b,.iel-road__bars .is-on b{color:#fff}
.iel-road__flag{position:absolute;right:2%;top:-8%;font-size:56px;color:var(--red);opacity:0;transition:opacity .4s}
.iel-road__slide:last-child .iel-road__flag{opacity:.9}
.iel-fastwrap{padding-top:40px}
@media (max-width:860px),(prefers-reduced-motion:reduce){
  .iel-road{height:auto;padding:50px 0 10px}
  .iel-road__sticky{position:static;height:auto;overflow:visible}
  .iel-road__prog{display:none}
  .iel-road__stage{position:static}
  .iel-road__slide,.iel-road__slide:first-child{position:relative;inset:auto;transform:none!important;opacity:1!important;grid-template-columns:1fr;gap:20px;padding:30px 16px}
  .iel-road__text,.iel-road__art{transform:none!important}
  .iel-road__art{height:150px}
  .iel-road__text .iel-ghost{margin-bottom:-28px}
  .iel-road__rows{font-size:16px}
}
.iel-fast{position:relative;overflow:hidden;margin-top:0;display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:center;
  background:var(--red);color:#fff;border-radius:24px;padding:28px 36px;box-shadow:-10px 12px 0 var(--navy)}
.iel-fast__head{display:flex;flex-direction:column;line-height:1.1}
.iel-fast__head small{font-size:16px;font-weight:600;opacity:.9}
.iel-fast__head strong{font-size:clamp(44px,5vw,64px);font-weight:900;font-style:italic;color:#fff}
.iel-fast__body{display:grid;gap:4px;font-size:17px;position:relative;z-index:1}
.iel-fast__body span{opacity:.85}
.iel-fast__body b{color:#fff}
.iel-fast__icon{position:absolute;right:28px;top:50%;transform:translateY(-50%);font-size:96px;opacity:.18}

/* 6. Tối ưu chương trình */
.iel-opt__grid{display:grid;grid-template-columns:repeat(6,1fr);gap:24px}
.iel-opt__item{grid-column:span 2;background:#fff;border-radius:18px;padding:22px 22px 24px;box-shadow:0 8px 24px rgba(0,0,0,.07);color:var(--ink);transition:transform .3s}
.iel-opt__item:nth-child(odd){transform:rotate(-1deg)}
.iel-opt__item:nth-child(even){transform:rotate(1deg)}
.iel-opt__item:hover{transform:rotate(0) translateY(-4px)}
.iel-opt__item:nth-child(4):nth-last-child(2){grid-column:2/span 2}
.iel-opt__item i{display:block;font-size:36px;color:var(--red);margin-bottom:12px}

/* 7. Đánh giá tiến bộ */
.iel-assess__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.iel-assess__grid article{background:var(--gray);border-radius:18px;padding:0 22px 24px;color:var(--ink)}
.iel-assess__grid .iel-ghost{margin:-6px 0 6px;color:rgba(29,42,110,.14)}
.iel-assess__grid b,.iel-assess__grid strong{color:var(--navy)}

@media (max-width:991px){
  .iel-about__grid,.iel-aud__panel{grid-template-columns:minmax(0,1fr)}
  .iel-about__art{order:-1}
  .iel-aud__panel{padding:32px 20px;border-radius:28px}
  .iel-opt__grid{grid-template-columns:repeat(2,1fr)}
  .iel-opt__item,.iel-opt__item:nth-child(4):nth-last-child(2){grid-column:auto}
  .iel-assess__grid{grid-template-columns:repeat(3,1fr);gap:16px}
  .iel-future__grid{grid-template-columns:1fr 1fr;gap:20px}
  .iel-future__item:last-child{grid-column:1/-1;max-width:560px;justify-self:center}
}
@media (max-width:767px){
  .iel{font-size:16px}
  .iel-sec{padding:44px 0}
  .iel-title::after{right:-20px;width:20px}
  .iel-future__grid,.iel-assess__grid,.iel-opt__grid{grid-template-columns:1fr;gap:24px}
  .iel-future__item:last-child{max-width:none}
  .iel-future .iel-sub{font-size:16px}
  .iel-future__icon{flex-basis:60px;height:60px;font-size:26px}
  .iel-perks{grid-template-columns:1fr;row-gap:4px}
  .iel-perks li,.iel-perks li+li{border-left:0;padding:10px 4px;border-top:1px solid #e6e8ef}
  .iel-perks li:first-child{border-top:0}
  .iel-assess__grid,.iel-opt__grid{gap:18px}
  .iel-about .iel-title em{display:block;width:fit-content;max-width:100%;border-radius:18px}
  .iel-doodle{display:none}
  .iel-fast{grid-template-columns:1fr;gap:12px;padding:24px;box-shadow:-6px 8px 0 var(--navy)}
  .iel-card{padding:22px 20px}
  .iel-about__cta .iel-btn{flex:1 1 100%;justify-content:center}
}

/* Slide ảnh khối giới thiệu */
/* Khung hình chiếc lá: góc trên-trái và dưới-phải bo lớn, 2 góc kia gần nhọn */
.iel-slider{--leaf:45% 14px 45% 14px / 55% 14px 55% 14px;position:relative;z-index:1;border-radius:var(--leaf);overflow:hidden;isolation:isolate;
  -webkit-mask-image:-webkit-radial-gradient(#fff,#000);background:#fff}
.iel-slider::after{content:'';position:absolute;inset:0;z-index:2;pointer-events:none;border-radius:inherit;box-shadow:inset 0 0 0 4px rgba(255,255,255,.55)}
.iel-about__art:has(.iel-slider) .iel-blob{inset:22px -22px -22px 22px;background:var(--pink);border-radius:45% 14px 45% 14px / 55% 14px 55% 14px;transform:rotate(3deg)}
.iel-slider .swiper-slide img{width:100%;height:auto;display:block;aspect-ratio:4/3;object-fit:cover}
.iel-slider__dots.swiper-pagination{bottom:14px}
.iel-slider__dots .swiper-pagination-bullet{width:8px;height:8px;background:#fff;opacity:.7;transition:width .3s}
.iel-slider__dots .swiper-pagination-bullet-active{width:26px;border-radius:4px;background:var(--red);opacity:1}
.iel-slider__nav{position:absolute;top:50%;z-index:2;transform:translateY(-50%);width:42px;height:42px;border:0;border-radius:50%;
  background:rgba(255,255,255,.9);color:var(--red);display:grid;place-items:center;box-shadow:0 4px 12px rgba(0,0,0,.12);opacity:0;transition:opacity .25s}
.iel-slider:hover .iel-slider__nav,.iel-slider__nav:focus-visible{opacity:1}
.iel-slider__nav--prev{left:14px}.iel-slider__nav--next{right:14px}

/* Khối "Build your confidence…" */
.iel-confidence{padding-top:20px}
.iel-confidence__panel{position:relative;margin:0;padding:40px 48px 28px;border-radius:40px;overflow:hidden;
  background:linear-gradient(135deg,#fff 0%,#fff 55%,var(--pink) 100%);border:1.5px dashed rgba(209,15,38,.25)}
.iel-confidence__panel img{position:relative;z-index:1;display:block;mix-blend-mode:multiply;width:100%;max-width:1000px;height:auto;margin:0 auto}
.iel-confidence__ring{position:absolute;left:-90px;bottom:-120px;width:320px;height:320px;border-radius:50%;border:28px solid rgba(29,42,110,.06)}
.iel-confidence__dots{position:absolute;right:28px;top:24px;width:120px;height:80px;
  background:radial-gradient(circle,rgba(209,15,38,.28) 2px,transparent 2.5px) 0 0/16px 16px}
.iel-confidence__plane{position:absolute;right:46px;bottom:34px;font-size:54px;color:var(--red);opacity:.5;transform:rotate(-12deg)}
@media (max-width:767px){
  .iel-about__art:has(.iel-slider) .iel-blob{inset:12px -10px -12px 10px}
  .iel-slider__nav{display:none}
  .iel-confidence__panel{padding:22px 14px 16px;border-radius:24px}
  .iel-confidence__dots,.iel-confidence__plane{display:none}
}

/* Slide video playlist YouTube (theme.includes.youtube_playlist) */
.iel-videos{background:linear-gradient(180deg,#fff 0%,var(--gray) 100%)}
.ytpl__head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:26px}
.ytpl__head .iel-title{margin-bottom:0}
.ytpl__tools{display:flex;align-items:center;gap:10px}
.ytpl__all{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:999px;border:1.5px solid var(--red);
  color:var(--red);font-weight:700;font-size:14px;text-decoration:none;transition:background .2s,color .2s}
.ytpl__all:hover{background:var(--red);color:#fff}
.ytpl__nav{width:42px;height:42px;border-radius:50%;border:1.5px solid var(--red);background:#fff;color:var(--red);display:grid;place-items:center;transition:background .2s,color .2s}
.ytpl__nav:hover{background:var(--red);color:#fff}
.ytpl__nav.swiper-button-disabled{opacity:.35;pointer-events:none}
.ytpl__slider{padding-bottom:40px!important}
.ytpl .swiper-slide{height:auto}
.ytpl__card{height:100%;background:#fff;border-radius:22px;overflow:hidden;box-shadow:0 10px 26px rgba(29,42,110,.08);transition:transform .3s,box-shadow .3s}
.ytpl__card:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(29,42,110,.14)}
.ytpl__media{position:relative;aspect-ratio:16/9;background:#000}
.ytpl__player{position:absolute;inset:0;width:100%;padding:0;border:0;background:#000;cursor:pointer}
.ytpl__player img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s,opacity .3s}
.ytpl__card:hover .ytpl__player img{transform:scale(1.04);opacity:.9}
.ytpl__play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:64px;height:64px;border-radius:50%;
  background:var(--red);color:#fff;display:grid;place-items:center;font-size:22px;box-shadow:0 0 0 8px rgba(209,15,38,.25);transition:transform .25s}
.ytpl__play i{margin-left:4px}
.ytpl__card:hover .ytpl__play{transform:translate(-50%,-50%) scale(1.08)}
.ytpl__media iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.ytpl__card.is-playing .ytpl__player{visibility:hidden}
.ytpl__title{margin:16px 18px 20px;padding:0;font-size:16px;font-weight:700;line-height:1.45;color:var(--ink);
  display:-webkit-box!important;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ytpl__dots .swiper-pagination-bullet-active{background:var(--red)}
@media (max-width:767px){
  .ytpl__nav{display:none}
  .ytpl__play{width:54px;height:54px;font-size:19px}
}
/* Lớp phủ trên video đang phát (ẩn control YouTube): bấm để dừng/phát tiếp */
.ytpl__tap{position:absolute;inset:0;z-index:2;width:100%;padding:0;border:0;background:transparent;cursor:pointer}
.ytpl__tap span{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.8);width:64px;height:64px;border-radius:50%;
  background:rgba(209,15,38,.92);color:#fff;display:grid;place-items:center;font-size:22px;opacity:0;transition:opacity .2s,transform .2s}
.ytpl__tap span i{margin-left:4px}
.ytpl__card.is-paused .ytpl__tap{background:rgba(0,0,0,.25)}
.ytpl__card.is-paused .ytpl__tap span{opacity:1;transform:translate(-50%,-50%) scale(1)}