/* ieltsgen9.com: Smartcom IELTS Gen 9 (Đông Anh & Ocean Park) */

/* Font tự host (Wix Madefor Display, cùng font smartcom.vn), tải từ Google Fonts */
/* vietnamese */
@font-face {
  font-family: "Wix Madefor Display";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("../fonts/wix-madefor-display-vietnamese.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;
}
/* latin-ext */
@font-face {
  font-family: "Wix Madefor Display";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("../fonts/wix-madefor-display-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: "Wix Madefor Display";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("../fonts/wix-madefor-display-latin.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;
}

:root {
  /* Bảng màu theo smartcom.vn (theme-main-v2 + ảnh chụp trang chủ) */
  --ink: #2c2361;        /* xanh than tím: khối tối, chữ nhấn */
  --ink-2: #3b0e90;      /* tím thương hiệu (.btn-purple, .bg-blue) */
  --violet: #4c5da9;     /* xanh tím của chữ nhấn trong tiêu đề */
  --crimson: #d50051;    /* .color-pearl */
  --amber: #f6a001;      /* nút cam "Tìm hiểu thêm" */
  --sky: #63cbe0;
  --heading: #1d1d1d;    /* tiêu đề gần đen */
  --cta: linear-gradient(90deg, #e91e63, #ff9800);       /* nút "Đăng ký tư vấn" */

  --page: #ffffff;
  --paper: #f4f4f6;      /* nền section xen kẽ, ô nhạt */
  --surface: #ffffff;
  --line: #e5e7eb;
  --text: #1d1d1d;
  --muted: #5f6070;

  /* The ribbon: the one place the full logo gradient lives */
  --ribbon: linear-gradient(90deg, #f6b043 0%, #ec6a45 22%, #d6094f 45%, #7a5cf0 72%, #8ef0ff 100%);

  /* Cùng font với smartcom.vn */
  --font-display: "Wix Madefor Display", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Wix Madefor Display", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Wix Madefor Display", system-ui, sans-serif;

  --wrap: 1180px;
  --section-pad: clamp(32px, 4.5vw, 52px); /* nửa khoảng cách giữa 2 phần liền nhau */
  --gutter: clamp(16px, 4vw, 32px);
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 1px 2px rgb(44 35 97 / 6%), 0 8px 24px rgb(44 35 97 / 10%);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font: 400 16px/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); color: var(--heading); line-height: 1.1; }
p { margin: 0 0 .75em; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

:focus-visible { outline: 3px solid var(--violet); outline-offset: 3px; border-radius: 6px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 8px;
}
.skip:focus { top: 12px; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.muted { color: var(--muted); }
.small { font-size: 14px; color: var(--muted); }

.eyebrow {
  font: 600 13px/1.3 var(--font-body);
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--crimson); margin-bottom: 12px;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 22px; border-radius: 999px; border: 2px solid transparent;
  font: 600 15px/1 var(--font-body); text-decoration: none; cursor: pointer;
  transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: 14px; }
.btn-primary { background: var(--cta); color: #fff; box-shadow: 0 6px 16px -6px rgb(233 30 99 / 45%); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }

.text-link { color: var(--ink); font-weight: 600; text-decoration: none; border-bottom: 2px solid var(--line); }
.text-link:hover { border-color: var(--crimson); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgb(255 255 255 / 90%);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; min-width: 0; }
.brand img { width: 40px; height: 40px; flex: none; }
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-name { font: 700 19px/1.1 var(--font-display); color: var(--ink); }
.brand-sub { font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a:not(.btn) {
  padding: 8px 12px; border-radius: 8px; text-decoration: none; white-space: nowrap;
  font-size: 15px; font-weight: 500; color: var(--text);
}
.nav a:not(.btn):hover { background: rgb(44 35 97 / 6%); }
.nav a[aria-current="page"] { color: var(--ink); font-weight: 600; background: rgb(44 35 97 / 6%); }

.nav-toggle {
  display: none; width: 44px; height: 44px; border: 0; border-radius: 10px;
  background: transparent; cursor: pointer; position: relative;
}
.nav-toggle .bar {
  position: absolute; left: 11px; right: 11px; height: 2px; background: var(--ink);
  transition: transform .2s ease;
}
.nav-toggle .bar:nth-of-type(2) { top: 17px; }
.nav-toggle .bar:nth-of-type(3) { top: 25px; }
.nav-toggle[aria-expanded="true"] .bar:nth-of-type(2) { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar:nth-of-type(3) { transform: translateY(-4px) rotate(-45deg); }

@media (max-width: 1080px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 16px; box-shadow: var(--shadow);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a:not(.btn) { padding: 14px 4px; border-bottom: 1px solid var(--line); border-radius: 0; }
}

/* Hero */
.hero { padding: clamp(32px, 5vw, 64px) 0 var(--section-pad); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.hero h1 {
  font-size: clamp(46px, 7.4vw, 90px); font-weight: 800; letter-spacing: -.03em; line-height: 1;
}
.h1-sub {
  display: block; margin-top: 14px;
  font-size: clamp(22px, 3vw, 34px); font-weight: 600; letter-spacing: -.015em; line-height: 1.15;
  color: var(--violet);
}
.lede { font-size: clamp(17px, 1.6vw, 19px); color: var(--muted); max-width: 34em; margin-top: 22px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* The band instrument */
.band-card {
  background: var(--ink); color: #fff;
  border-radius: var(--radius-lg); padding: clamp(22px, 3vw, 32px);
  box-shadow: 0 30px 60px -20px rgb(44 35 97 / 45%);
}
.band-card-label { font-weight: 600; color: rgb(255 255 255 / 80%); margin: 0; }
.band-readout {
  display: block; font: 800 clamp(88px, 12vw, 136px)/1 var(--font-display);
  letter-spacing: -.04em; margin: 6px 0 14px;
  font-variant-numeric: tabular-nums;
}

.ruler { position: relative; padding-top: 6px; }
.ruler-track {
  position: relative; height: 14px; border-radius: 999px;
  background: rgb(255 255 255 / 12%); overflow: hidden;
}
.ruler-fill {
  position: absolute; inset: 0; background: var(--ribbon);
  clip-path: inset(0 calc(100% - 13px - (100% - 26px) * var(--r, .375)) 0 0 round 999px);
}
.ruler input[type="range"] {
  position: absolute; z-index: 2; left: 0; right: 0; top: 0; width: 100%; height: 26px;
  margin: 0; background: transparent; -webkit-appearance: none; appearance: none; cursor: grab;
}
.ruler input[type="range"]:active { cursor: grabbing; }
.ruler input[type="range"]::-webkit-slider-runnable-track { height: 26px; background: transparent; }
.ruler input[type="range"]::-moz-range-track { height: 26px; background: transparent; }
.ruler input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 26px; height: 26px; border-radius: 50%;
  background: #fff; border: 4px solid var(--crimson); box-shadow: 0 2px 10px rgb(0 0 0 / 35%);
}
.ruler input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: #fff; border: 4px solid var(--crimson); box-shadow: 0 2px 10px rgb(0 0 0 / 35%);
}
.ruler input[type="range"]:focus-visible { outline: none; }
.ruler input[type="range"]:focus-visible::-webkit-slider-thumb { outline: 3px solid var(--sky); outline-offset: 2px; }
.ruler input[type="range"]:focus-visible::-moz-range-thumb { outline: 3px solid var(--sky); outline-offset: 2px; }

.ruler-ticks {
  display: flex; justify-content: space-between; margin-top: 10px; padding-inline: 13px;
  font: 500 12px/1 var(--font-mono); color: rgb(255 255 255 / 55%);
}
.ruler-ticks li { width: 0; display: flex; justify-content: center; }
.ruler-ticks .t9 { color: var(--sky); font-weight: 600; }
.band-hint { font-size: 13px; color: rgb(255 255 255 / 60%); margin: 14px 0 0; }

.band-result {
  margin-top: 20px; padding: 18px 20px; border-radius: var(--radius);
  background: rgb(255 255 255 / 7%); border: 1px solid rgb(255 255 255 / 12%);
}
.band-result-kicker { font: 700 12px/1 var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--amber); margin-bottom: 8px; }
.band-result-name { font: 700 26px/1.15 var(--font-display); margin-bottom: 4px; }
.band-result-desc { color: rgb(255 255 255 / 75%); font-size: 15px; margin-bottom: 12px; }
.band-result-link { color: var(--sky); font-weight: 600; text-decoration: none; }
.band-result-link:hover { text-decoration: underline; }
.band-result-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0; }
.band-result-links [hidden] { display: none; }
.band-result-alt {
  display: block; margin-top: 14px; padding-top: 12px; border-top: 1px dashed rgb(255 255 255 / 20%);
  font-size: 14px; color: rgb(255 255 255 / 75%); text-decoration: none;
}
.band-result-alt[hidden] { display: none; }
.band-result-alt b { color: var(--amber); }
.band-result-alt:hover b { text-decoration: underline; }

@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
}

/* Credentials */
.creds { border-block: 1px solid var(--line); background: var(--surface); }
.creds-row { display: grid; grid-template-columns: repeat(3, 1fr); }
.creds-row li { padding: 20px 24px; font-size: 14px; color: var(--muted); border-left: 1px solid var(--line); }
.creds-row li:first-child { border-left: 0; padding-left: 0; }
.creds-row strong { display: block; color: var(--ink); font-size: 15px; margin-bottom: 2px; }
@media (max-width: 760px) {
  .creds-row { grid-template-columns: 1fr; }
  .creds-row li { border-left: 0; border-top: 1px solid var(--line); padding: 16px 0; }
  .creds-row li:first-child { border-top: 0; }
}

/* Sections */
.section { padding: var(--section-pad) 0; }
.section-alt { background: var(--paper); }
.section-head { max-width: 720px; margin-bottom: clamp(20px, 3vw, 32px); }
.section-head h2 { font-size: clamp(32px, 4.4vw, 52px); font-weight: 700; letter-spacing: -.025em; }
.section-lede { margin-top: 16px; font-size: 17px; color: var(--muted); }
.section-head-row { max-width: none; display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; }

/* Roadmap on the band axis */
.roadmap { --label-col: minmax(0, 1fr); --track-col: minmax(0, 1.35fr); position: relative; }
.roadmap-axis {
  position: relative; height: 22px; margin-left: calc((100% - 32px) / 2.35 + 32px);
  font: 500 12px/1 var(--font-mono); color: var(--muted);
}
.roadmap-axis span { position: absolute; left: calc((var(--b) - 1) / 8 * 100%); transform: translateX(-50%); }
.roadmap-axis span:first-child { transform: none; }
.roadmap-axis span:last-child { transform: translateX(-100%); color: var(--crimson); font-weight: 600; }

.course {
  display: grid; grid-template-columns: var(--label-col) var(--track-col); gap: 0 32px; align-items: center;
  padding: 22px 0; border-top: 1px solid var(--line);
  transition: background-color .2s ease;
}
.course:last-of-type { border-bottom: 1px solid var(--line); }
.course-body { grid-column: 1; grid-row: 1; }
.course-bar {
  grid-column: 2; grid-row: 1; position: relative; height: 18px; border-radius: 999px;
  background:
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px calc(100% / 16)),
    rgb(44 35 97 / 4%);
}
.course-bar::after {
  content: ""; position: absolute; inset: 0; background: var(--ribbon); border-radius: 999px;
  clip-path: inset(0 calc((9 - var(--to)) / 8 * 100%) 0 calc((var(--from) - 1) / 8 * 100%) round 999px);
  opacity: .45; transition: opacity .2s ease;
}
.course h3 { font-size: 22px; font-weight: 700; }
.course-entry { font: 600 14px/1.4 var(--font-body); font-variant-numeric: tabular-nums; color: var(--crimson); margin: 4px 0 6px; }
.course-body > p:not(.course-entry) { color: var(--muted); font-size: 15px; max-width: 34em; margin: 0; }
.course-more { display: inline-block; margin-top: 8px; font-size: 14px; font-weight: 600; color: var(--ink); text-decoration: none; border-bottom: 2px solid var(--line); }
.course-more:hover { border-color: var(--crimson); }
.course.is-match .course-bar::after { opacity: 1; }
.course .course-bar-goal::before { opacity: .2; }
.course.is-match .course-bar-goal::before { opacity: .4; }
.roadmap-alt-label {
  margin: 28px 0 0; padding-top: 18px; border-top: 2px dashed var(--line);
  font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--crimson);
}
.course-alt { border-top: 0; padding-top: 10px; }
.course.is-match h3::after {
  content: "Phù hợp với bạn"; margin-left: 10px; vertical-align: middle;
  font: 600 11px/1 var(--font-body); letter-spacing: .04em; text-transform: uppercase;
  padding: 5px 8px; border-radius: 999px; background: var(--ink); color: #fff;
}

.roadmap-note {
  margin-top: 20px; padding: 16px 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line); color: var(--muted);
}
.roadmap-note strong { color: var(--ink); }

@media (max-width: 760px) {
  .roadmap-axis { display: none; }
  .course { grid-template-columns: 1fr; gap: 14px; }
  .course-bar { grid-column: 1; grid-row: 2; height: 12px; }
}

/* Week split */
.week { margin: 0 0 32px; }
.week-bar { display: flex; gap: 6px; min-height: 92px; }
.seg {
  flex: var(--h) 1 0; min-width: 0;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 14px 16px; border-radius: var(--radius); font-size: 14px; line-height: 1.3;
}
.seg b { display: block; font: 700 clamp(22px, 3vw, 32px)/1 var(--font-display); margin-bottom: 4px; }
.seg-class { background: var(--ink); color: #fff; }
.seg-zoom { background: var(--violet); color: #fff; }
.seg-lms { background: rgb(44 35 97 / 6%); color: var(--ink); border: 1px dashed rgb(44 35 97 / 25%); }
.week figcaption { margin-top: 14px; color: var(--muted); font-size: 15px; }
.week figcaption strong { color: var(--ink); }
@media (max-width: 560px) {
  .week-bar { flex-direction: column; }
  .seg { flex: none; min-height: calc(var(--h) * 18px + 40px); }
}

.method-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 56px); }
.method-col h3 { font-size: 24px; margin-bottom: 16px; }
.method-col > p { color: var(--muted); }
.ticks li { position: relative; padding: 10px 0 10px 30px; border-bottom: 1px solid var(--line); }
.ticks li::before {
  content: ""; position: absolute; left: 2px; top: 17px; width: 14px; height: 8px;
  border-left: 2.5px solid var(--crimson); border-bottom: 2.5px solid var(--crimson);
  transform: rotate(-45deg);
}
.method-col .small { margin-top: 14px; }
@media (max-width: 760px) { .method-grid { grid-template-columns: 1fr; } }

/* Students */
/* Dải học viên chạy liên tục (2 lượt giống nhau, dịch -50% rồi lặp lại) */
.marquee {
  overflow: hidden; padding: 6px 0 18px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}
.marquee:focus-visible { outline: 3px solid var(--violet); outline-offset: -3px; }
.students { display: flex; width: max-content; animation: marquee 48s linear infinite; }
.marquee:hover .students, .marquee:focus-within .students { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }
.student {
  flex: none; width: 220px; margin-right: 16px; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 14px 14px 18px; display: flex; flex-direction: column;
}
.student-photo { position: relative; border-radius: var(--radius); overflow: hidden; background: var(--paper); }
.student-photo img { width: 100%; aspect-ratio: 1; object-fit: cover; transition: transform .5s cubic-bezier(.2,.7,.2,1); }
.student:hover .student-photo img { transform: scale(1.05); }
.student-badge {
  position: absolute; top: 0; right: 0; display: grid; justify-items: center; padding: 8px 10px 7px;
  border-radius: 0 0 0 14px; background: linear-gradient(160deg, #ff9800, #e91e63); color: #fff;
  box-shadow: -4px 4px 14px -4px rgb(233 30 99 / 50%);
}
.student-badge b { font: 800 24px/1 var(--font-display); letter-spacing: -.02em; }
.student-badge small { font-size: 10px; font-weight: 700; letter-spacing: .08em; }
.student-name { font-weight: 700; color: var(--ink); margin: 14px 0 2px; }
.student-school { font-size: 13px; color: var(--muted); margin: 0; }

/* Teachers */
.teachers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.teacher { display: flex; flex-direction: column; }
.teacher-photo {
  background: var(--surface); border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 600 / 702;
}
.teacher-photo img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.teacher h3 { font-size: 18px; margin: 14px 0 4px; }
.teacher p { font-size: 14px; color: var(--muted); }
@media (max-width: 960px) { .teachers { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .teachers { grid-template-columns: repeat(2, 1fr); gap: 14px; } .teacher h3 { font-size: 16px; } }

/* Branches */
.branches { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.branch { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; }
.branch-map { aspect-ratio: 16 / 9; background: var(--line); }
.branch-map iframe { width: 100%; height: 100%; border: 0; display: block; }
.branch-body { padding: 22px 24px 24px; }
.branch h3 { font-size: 26px; }
.branch-addr { margin: 10px 0 18px; }
.branch-actions { display: flex; flex-wrap: wrap; gap: 10px; }
@media (max-width: 760px) { .branches { grid-template-columns: 1fr; } }

/* Posts */

/* FAQ */
.faq-wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(24px, 4vw, 64px); align-items: start; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:first-child { border-top: 1px solid var(--line); }
.faq summary {
  list-style: none; cursor: pointer; padding: 20px 40px 20px 0; position: relative;
  font-weight: 600; font-size: 17px; color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  font: 400 26px/1 var(--font-body); color: var(--crimson); transition: transform .2s ease;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 20px; max-width: 42em; }
.faq details p a { color: var(--ink); font-weight: 600; text-decoration-color: var(--crimson); text-underline-offset: 3px; }
@media (max-width: 760px) { .faq-wrap { grid-template-columns: 1fr; } }

/* Footer */
.site-footer { background: #1a1a5e; color: rgb(255 255 255 / 70%); padding: 64px 0 24px; font-size: 14px; }
.site-footer a { color: #fff; text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.site-footer h3 { color: #fff; font-family: var(--font-body); font-size: 15px; margin-bottom: 10px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr .8fr; gap: 32px; }
.brand-light { margin-bottom: 16px; }
.brand-light .brand-name { color: #fff; }
.brand-light .brand-sub { color: rgb(255 255 255 / 60%); }
.socials { display: flex; flex-direction: column; gap: 6px; }
.footer-base { margin-top: 48px; padding-top: 20px; border-top: 1px solid rgb(255 255 255 / 12%); font-size: 13px; color: rgb(255 255 255 / 50%); }
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* Nút lên đầu trang */
.to-top {
  position: fixed; right: 16px; bottom: 16px; z-index: 60; display: grid; place-items: center;
  width: 48px; height: 48px; border: 0; border-radius: 50%; cursor: pointer;
  background: var(--cta); color: #fff; box-shadow: 0 10px 24px -6px rgb(233 30 99 / 55%);
  opacity: 0; visibility: hidden; transform: translateY(16px);
  transition: opacity .25s ease, transform .25s cubic-bezier(.2,.7,.2,1), visibility .25s;
}
.to-top.is-shown { opacity: 1; visibility: visible; transform: none; }
.to-top.is-shown:hover { transform: translateY(-3px); }
.to-top svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.to-top:focus-visible { outline: 3px solid var(--violet); outline-offset: 3px; }

/* ============ Course detail page ============ */
.section-tight { padding: var(--section-pad) 0; }
.h2-md { font-size: clamp(26px, 3.2vw, 38px); font-weight: 700; letter-spacing: -.02em; margin-bottom: 18px; }
.h2-md + .section-lede { margin-top: 0; }

.crumbs ol { display: flex; flex-wrap: wrap; gap: 6px; font-size: 14px; color: var(--muted); margin-bottom: 28px; }
.crumbs li + li::before { content: "›"; margin-right: 6px; color: var(--line); }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--ink); text-decoration: underline; }
.crumbs [aria-current] { color: var(--ink); font-weight: 600; }

.course-hero { padding: clamp(20px, 3vw, 32px) 0 clamp(32px, 4.5vw, 52px); }
.course-hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.course-hero h1 { font-size: clamp(38px, 5.6vw, 68px); font-weight: 800; letter-spacing: -.025em; line-height: 1.05; }
.course-hero .h1-sub { font-size: clamp(20px, 2.4vw, 28px); }

.course-span {
  background: var(--ink); color: #fff; border-radius: var(--radius-lg);
  padding: clamp(22px, 3vw, 32px); box-shadow: 0 30px 60px -20px rgb(44 35 97 / 45%);
}
.course-span-ends { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin-bottom: 18px; }
.course-span-ends b { display: block; font: 800 clamp(56px, 7vw, 80px)/1 var(--font-display); letter-spacing: -.03em; }
.course-span-ends-3 b { font-size: clamp(40px, 4.6vw, 58px); }
.span-to { text-align: right; }
.span-label { display: block; font-size: 13px; font-weight: 600; color: rgb(255 255 255 / 70%); margin-bottom: 6px; }
.span-to .span-label { color: var(--sky); }
.course-bar-lg { height: 14px; background: rgb(255 255 255 / 12%); }
.course-bar-lg::after { opacity: 1; }
.ruler-ticks-dark { padding-inline: 0; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 24px 0 0; padding-top: 20px; border-top: 1px solid rgb(255 255 255 / 14%); }
.facts dt { font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--amber); margin-bottom: 4px; }
.facts dd { margin: 0; font-weight: 600; font-size: 15px; line-height: 1.35; }
@media (max-width: 880px) { .course-hero-grid { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .facts { grid-template-columns: 1fr; } }

/* Trang Học phí: thẻ bậc học phí ở hero */
.course-span > .span-label { margin-bottom: 8px; }
.price-list li + li { border-top: 1px solid rgb(255 255 255 / 14%); }
.price-list a { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 14px 0; color: #fff; text-decoration: none; }
.price-list li:last-child a { padding-bottom: 0; }
.price-name { font-weight: 700; font-size: 17px; }
.price-name small { display: block; font-size: 13px; font-weight: 500; color: rgb(255 255 255 / 65%); margin-top: 2px; }
.price-list b { font: 800 clamp(20px, 2.4vw, 26px)/1 var(--font-display); color: var(--amber); font-variant-numeric: tabular-nums; white-space: nowrap; }
.price-list b::after { content: "/tháng"; font-size: 13px; font-weight: 600; color: rgb(255 255 255 / 65%); margin-left: 2px; }
.price-list a:hover .price-name { text-decoration: underline; }
@media (max-width: 480px) { .price-list b { text-align: right; } .price-list b::after { display: block; margin: 4px 0 0; } }
.price-more { margin-top: 16px; }
.lien-he-lede { max-width: 720px; margin-bottom: 24px; }

.fit-list { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.fit-list li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; }
.fit-list h3 { font-size: 20px; margin-bottom: 8px; }
.fit-list p { color: var(--muted); }
.note { margin-top: 16px; padding: 16px 20px; border-left: 4px solid var(--amber); background: rgb(246 160 1 / 12%); border-radius: 0 var(--radius) var(--radius) 0; }
@media (max-width: 680px) { .fit-list { grid-template-columns: 1fr; } }

.fee-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(28px, 5vw, 64px); align-items: start; }
.fee-grid .section-lede { margin-bottom: 16px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.fee-table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 340px; }
.fee-table th, .fee-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); }
.fee-table thead th { font-size: 13px; font-weight: 600; color: var(--muted); background: var(--paper); }
.fee-table tbody tr:last-child > * { border-bottom: 0; }
.fee-table tbody th { color: var(--ink); font-weight: 700; }
.fee-table .num { font-variant-numeric: tabular-nums; font-weight: 600; color: var(--crimson); white-space: nowrap; }
@media (max-width: 880px) { .fee-grid { grid-template-columns: minmax(0, 1fr); } }

.content-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.toc { position: sticky; top: 92px; }
.toc-title { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.toc ol { border-left: 2px solid var(--line); }
.toc a {
  display: block; padding: 7px 0 7px 16px; margin-left: -2px; border-left: 2px solid transparent;
  font-size: 15px; color: var(--muted); text-decoration: none;
}
.toc a:hover { color: var(--ink); }
.toc a.is-active { color: var(--ink); font-weight: 600; border-left-color: var(--crimson); }
.content { max-width: 780px; }
@media (max-width: 960px) {
  .content-layout { grid-template-columns: minmax(0, 1fr); }
  .toc { position: static; }
  .toc ol { display: flex; flex-wrap: wrap; gap: 8px; border: 0; }
  .toc a { margin: 0; padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; background: var(--surface); }
  .toc a.is-active { border-color: var(--ink); }
}

.content-block { padding: 28px 0; border-top: 1px solid var(--line); scroll-margin-top: 88px; }
.content-block:first-child { padding-top: 0; border-top: 0; }
.content-block h3 { font-size: clamp(22px, 2.6vw, 28px); font-weight: 700; letter-spacing: -.015em; margin-bottom: 14px; }
.content-block h4 { font: 700 17px/1.3 var(--font-body); color: var(--ink); margin: 22px 0 10px; }
.content-block > p { color: var(--text); }

.bullets { margin-top: 8px; }
.bullets > li { position: relative; padding: 8px 0 8px 22px; }
.bullets > li::before { content: ""; position: absolute; left: 2px; top: 18px; width: 7px; height: 7px; border-radius: 50%; background: var(--crimson); }
.bullets strong { color: var(--ink); }
.bullets ul { margin-top: 8px; }
.bullets ul li { position: relative; padding: 4px 0 4px 20px; color: var(--muted); }
.bullets ul li::before { content: ""; position: absolute; left: 2px; top: 15px; width: 10px; height: 2px; background: var(--violet); }

.modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 14px; }
.modes li { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; background: var(--surface); }
.modes b { display: block; font: 700 19px/1.2 var(--font-display); color: var(--ink); margin-bottom: 6px; }
.modes span { font-size: 14px; color: var(--muted); }
@media (max-width: 640px) { .modes { grid-template-columns: 1fr; } }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 0 32px; }
@media (max-width: 640px) { .split { grid-template-columns: 1fr; } }

.criteria { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 12px 0 8px; }
.criteria > div { display: flex; gap: 14px; align-items: flex-start; padding: 14px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.criteria dt { flex: none; min-width: 48px; font: 600 15px/1.4 var(--font-mono); color: var(--crimson); }
.criteria dd { margin: 0; font-size: 14px; color: var(--muted); }
.criteria dd b { display: block; color: var(--ink); font-size: 15px; }
.practice { margin-top: 14px; }
@media (max-width: 560px) { .criteria { grid-template-columns: 1fr; } }

.steps { counter-reset: step; margin-top: 12px; }
.steps li { counter-increment: step; position: relative; padding: 0 0 22px 52px; min-height: 36px; font-weight: 600; color: var(--ink); line-height: 36px; }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: 0; width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center; background: var(--ink); color: #fff; font: 700 15px/1 var(--font-display);
}
.steps li:not(:last-child)::after { content: ""; position: absolute; left: 17px; top: 40px; bottom: 4px; width: 2px; background: var(--line); }
.steps li:last-child::before { background: var(--crimson); }

/* Shared by course pages with h2-level content blocks (Advanced) */
.lede-2 { margin-top: 12px; }
.section-flush-top { padding-top: var(--section-pad); }
.content-block h2 { font-size: clamp(26px, 3.2vw, 36px); font-weight: 700; letter-spacing: -.02em; margin-bottom: 16px; }
.content-block h2 ~ h3 { font-size: clamp(20px, 2.2vw, 23px); margin: 30px 0 10px; }
.content-block a:not(.btn) { color: var(--ink); font-weight: 600; text-decoration-color: var(--crimson); text-underline-offset: 3px; }

.span-mid { text-align: center; }
.span-mid .span-label { color: var(--amber); }
.course-bar-goal::after {
  clip-path: inset(0 calc((9 - var(--commit)) / 8 * 100%) 0 calc((var(--from) - 1) / 8 * 100%) round 999px);
}
.course-bar-goal::before {
  content: ""; position: absolute; inset: 0; background: var(--ribbon); opacity: .35; border-radius: 999px;
  clip-path: inset(0 calc((9 - var(--to)) / 8 * 100%) 0 calc((var(--from) - 1) / 8 * 100%) round 999px);
}

.skill-goals { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0 22px; }
.skill-goals li {
  display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto auto; align-items: end; gap: 0 12px;
  padding: 18px 20px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line);
}
.skill-goals span { font-weight: 700; color: var(--ink); }
.skill-goals b { grid-row: 1 / 3; grid-column: 2; font: 800 44px/1 var(--font-display); color: var(--crimson); letter-spacing: -.02em; }
.skill-goals small { font-size: 14px; color: var(--muted); }

.outcomes { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 14px 0 20px; }
.outcome { position: relative; padding: 22px 22px 22px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); }
.outcome-high { background: var(--ink); border-color: var(--ink); color: rgb(255 255 255 / 82%); }
.outcome-band { font: 800 52px/1 var(--font-display); letter-spacing: -.03em; color: var(--ink); margin-bottom: 10px; }
.outcome-high .outcome-band { background: var(--ribbon); -webkit-background-clip: text; background-clip: text; color: transparent; }
.outcome h3 { font-size: 20px; margin-bottom: 8px; }
.outcome-high h3 { color: #fff; }
.outcome > p:last-child { font-size: 15px; }
.outcome:not(.outcome-high) > p:last-child { color: var(--muted); }

.steps-detail li { line-height: 1.55; font-weight: 400; color: var(--text); padding-bottom: 20px; }
.steps-detail li b { display: block; line-height: 36px; color: var(--ink); font-weight: 700; }

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 12px 0 16px; }
.compare > div { padding: 18px 20px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); border-top: 4px solid var(--violet); }
.compare > div:first-child { border-top-color: var(--crimson); }
.compare b { display: block; font: 700 18px/1.25 var(--font-display); color: var(--ink); margin-bottom: 6px; }
.compare p { color: var(--muted); font-size: 15px; }

.detail-list { margin: 0; border-top: 1px solid var(--line); }
.detail-list > div { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 8px 24px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.detail-list dt { font-weight: 700; color: var(--ink); }
.detail-list dd { margin: 0; }
.detail-list ul { margin: 8px 0; }
.detail-list li { position: relative; padding: 3px 0 3px 20px; color: var(--muted); }
.detail-list li::before { content: ""; position: absolute; left: 2px; top: 14px; width: 10px; height: 2px; background: var(--violet); }

.next-course {
  display: grid; gap: 4px; margin-top: 36px; padding: 22px 24px; border-radius: var(--radius-lg);
  border: 1px solid var(--line); background: var(--surface); text-decoration: none;
  transition: border-color .15s ease, transform .15s ease;
}
.next-course:hover { border-color: var(--ink); transform: translateY(-2px); }
.next-course-label { font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--crimson); }
.next-course-name { font: 700 24px/1.2 var(--font-display); color: var(--ink); }
.next-course-name::after { content: " →"; }
.next-course-meta { font-size: 14px; color: var(--muted); }

@media (max-width: 640px) {
  .skill-goals, .outcomes, .compare { grid-template-columns: 1fr; }
  .detail-list > div { grid-template-columns: 1fr; }
}

/* Super Stars page */
.content-block .fit-list h3, .content-block .features h3, .content-block .role h3, .content-block .outcome h3 { font-size: 19px; margin: 0 0 8px; letter-spacing: -.01em; }
.content-block .fit-list { margin-top: 4px; }

.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 14px; }
.features li { padding: 20px 22px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.features li:first-child { grid-column: 1 / -1; background: var(--ink); border-color: var(--ink); }
.features li:first-child h3 { color: #fff; }
.features li:first-child p { color: rgb(255 255 255 / 80%); }
.features p { color: var(--muted); font-size: 15px; }

.roles { display: grid; gap: 14px; margin-top: 16px; }
.role { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 22px; align-items: start; padding: 20px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); }
.role-plain { grid-template-columns: 1fr; }
.role-photos { border-radius: var(--radius); overflow: hidden; background: var(--paper); }
.role-photos img { width: 100%; height: auto; }
.role-photos-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; background: transparent; }
.role-photos-3 img { background: var(--paper); border-radius: 10px; }
.role-kicker { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--crimson); margin-bottom: 4px; }
.role p:not(.role-kicker) { color: var(--muted); font-size: 15px; }
.role-lead { border-color: var(--ink); box-shadow: inset 4px 0 0 var(--crimson); }
@media (max-width: 640px) {
  .features { grid-template-columns: 1fr; }
  .role { grid-template-columns: 1fr; }
  .role-photos:not(.role-photos-3) { max-width: 200px; }
}

.phases { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin: 14px 0 24px; }
.phases li { position: relative; display: grid; gap: 4px; padding: 18px 20px; border-radius: var(--radius); color: #fff; }
.phases li:first-child { background: var(--ink-2); }
.phases li:last-child { background: var(--ink); }
.phases li:first-child::after {
  content: ""; position: absolute; right: -14px; top: 50%; z-index: 1; width: 22px; height: 22px; transform: translateY(-50%) rotate(45deg);
  background: var(--ink-2); border-radius: 3px;
}
.phase-weeks { font: 600 13px/1 var(--font-mono); color: var(--amber); }
.content-block .phases .phase-name { font: 700 22px/1.2 var(--font-display); color: #fff; text-decoration: none; }
.content-block .phases .phase-name::after { content: " →"; color: var(--sky); }
.content-block .phases .phase-name:hover { text-decoration: underline; }
.phase-desc { font-size: 14px; color: rgb(255 255 255 / 75%); }
@media (max-width: 560px) { .phases { grid-template-columns: 1fr; } .phases li:first-child::after { display: none; } }

.week-tight { margin: 12px 0 8px; }
.week-tight .week-bar { min-height: 80px; }

.content-block .commit-line {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 16px;
  padding: 18px 22px; border-radius: var(--radius); background: var(--ink); color: rgb(255 255 255 / 80%); margin-bottom: 8px;
}
.commit-line b { font: 800 34px/1 var(--font-display); color: #fff; letter-spacing: -.02em; }

/* ============ Hiệu ứng và nâng cấp giao diện ============ */
.hl { color: var(--violet); }
.course-hero h1 .hl { color: var(--violet); }

/* Header thu gọn khi cuộn */
.site-header { transition: box-shadow .25s ease, background-color .25s ease; }
.header-row { transition: height .25s ease; }
.site-header.is-scrolled { box-shadow: 0 6px 24px -12px rgb(44 35 97 / 30%); }
.site-header.is-scrolled .header-row { height: 60px; }
@media (max-width: 1080px) { .site-header.is-scrolled .nav { top: 60px; } }

/* Nút gradient đổi hướng màu khi hover */
.btn-primary { background-size: 180% 100%; background-position: 0 0; transition: transform .15s ease, background-position .4s ease, box-shadow .2s ease; }
.btn-primary:hover { background: var(--cta); background-size: 180% 100%; background-position: 100% 0; box-shadow: 0 10px 22px -8px rgb(233 30 99 / 55%); }
.btn-ghost:hover { background: var(--paper); }

/* Link có mũi tên trượt */
.course-more::after, .text-link::after { content: "→"; display: inline-block; margin-left: 6px; transition: transform .2s ease; }
.course-more:hover::after, .text-link:hover::after { transform: translateX(4px); }

/* Nền đầu trang: đốm màu logo */
.hero, .course-hero { position: relative; isolation: isolate; overflow: hidden; }
.hero::before, .hero::after, .course-hero::before {
  content: ""; position: absolute; z-index: -1; border-radius: 50%; filter: blur(70px); opacity: .55; pointer-events: none;
}
.hero::before { width: 520px; height: 520px; right: -120px; top: -140px; background: radial-gradient(circle, rgb(233 30 99 / 45%), transparent 65%); animation: drift 16s ease-in-out infinite alternate; }
.hero::after { width: 460px; height: 460px; right: 22%; bottom: -220px; background: radial-gradient(circle, rgb(99 203 224 / 55%), transparent 65%); animation: drift 19s ease-in-out infinite alternate-reverse; }
.course-hero::before { width: 520px; height: 520px; right: -160px; top: -180px; background: radial-gradient(circle, rgb(91 100 240 / 35%), transparent 65%); }
@keyframes drift { to { transform: translate(-40px, 30px) scale(1.08); } }

/* Ảnh học viên xếp chồng dưới nút ở hero */
.proof { display: inline-flex; align-items: center; gap: 14px; margin-top: 26px; text-decoration: none; color: var(--muted); }
.proof-faces { display: flex; flex-shrink: 0; }
.proof-faces img { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; border: 3px solid #fff; margin-left: -12px; box-shadow: 0 2px 8px rgb(44 35 97 / 18%); transition: transform .2s ease; }
.proof-faces img:first-child { margin-left: 0; }
.proof:hover .proof-faces img { transform: translateY(-3px); }
.proof:hover .proof-faces img:nth-child(2) { transition-delay: .03s; }
.proof:hover .proof-faces img:nth-child(3) { transition-delay: .06s; }
.proof:hover .proof-faces img:nth-child(4) { transition-delay: .09s; }
.proof:hover .proof-faces img:nth-child(5) { transition-delay: .12s; }
.proof-text { font-size: 14px; line-height: 1.35; }
.proof-text b { display: block; color: var(--heading); font-size: 15px; }

/* Icon dải uy tín */
.creds-row li { display: flex; gap: 14px; align-items: flex-start; }
.cred-icon { flex: none; display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: linear-gradient(135deg, rgb(255 152 0 / 16%), rgb(233 30 99 / 14%)); }
.cred-icon svg { width: 24px; height: 24px; fill: none; stroke: var(--crimson); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

/* Chuyển nền mềm giữa section trắng và xám */
.section-alt { background: linear-gradient(180deg, var(--page) 0, var(--paper) 56px, var(--paper) calc(100% - 56px), var(--page) 100%); }

/* Thẻ: nhấc nhẹ khi hover */
.student, .branch, .fit-list li, .features li, .modes li, .compare > div, .outcome, .role, .skill-goals li, .criteria > div {
  transition: transform .25s cubic-bezier(.2,.7,.2,1), box-shadow .25s ease, border-color .2s ease;
}
.student:hover, .branch:hover, .fit-list li:hover, .features li:hover, .modes li:hover, .compare > div:hover, .outcome:hover, .skill-goals li:hover {
  transform: translateY(-4px); box-shadow: var(--shadow);
}
.teacher-photo img { transition: transform .6s cubic-bezier(.2,.7,.2,1); }
.teacher:hover .teacher-photo img { transform: scale(1.04); }

/* Footer: dải màu logo ở mép trên */
.site-footer { position: relative; }
.site-footer::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: var(--ribbon); }

/* Đầu trang vừa tải: hiện dần theo thứ tự (chỉ CSS, không cần JS) */
@keyframes rise { from { opacity: 0; transform: translateY(18px); } }
@keyframes rise-card { from { opacity: 0; transform: translateY(26px) scale(.98); } }
.hero-copy > *, .course-hero-grid > div > *, .crumbs { animation: rise .7s cubic-bezier(.2,.7,.2,1) both; }
.hero-copy > :nth-child(2), .course-hero-grid > div > :nth-child(2) { animation-delay: .08s; }
.hero-copy > :nth-child(3), .course-hero-grid > div > :nth-child(3) { animation-delay: .16s; }
.hero-copy > :nth-child(4), .course-hero-grid > div > :nth-child(4) { animation-delay: .24s; }
.hero-copy > :nth-child(5), .course-hero-grid > div > :nth-child(5) { animation-delay: .32s; }
.band-card, .course-span { animation: rise-card .8s cubic-bezier(.2,.7,.2,1) .2s both; }
@keyframes bar-draw { from { clip-path: inset(0 calc(100% - (var(--from) - 1) / 8 * 100%) 0 calc((var(--from) - 1) / 8 * 100%) round 999px); } }
.course-span .course-bar::after, .course-span .course-bar::before { animation: bar-draw 1.1s cubic-bezier(.3,.7,.2,1) .6s both; }

/* Hiện dần khi cuộn tới (JS gắn data-reveal cho phần tử ở dưới màn hình) */
[data-reveal] {
  transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1);
  transition-delay: calc(var(--i, 0) * 70ms);
}
[data-reveal]:not(.is-in) { opacity: 0; transform: translateY(24px); }

/* Thanh lộ trình tô dần từ trái sang khi cuộn tới */
.roadmap .course-bar::after, .roadmap .course-bar::before { transition: clip-path 1s cubic-bezier(.3,.7,.2,1) calc(var(--i, 0) * 90ms + .15s), opacity .2s ease; }
.course[data-reveal]:not(.is-in) .course-bar::after,
.course[data-reveal]:not(.is-in) .course-bar::before { clip-path: inset(0 calc(100% - (var(--from) - 1) / 8 * 100%) 0 calc((var(--from) - 1) / 8 * 100%) round 999px); }

/* Thanh giờ học trong tuần dài dần ra */
.seg { overflow: hidden; white-space: nowrap; transition: flex-grow 1s cubic-bezier(.3,.7,.2,1); }
.week[data-reveal]:not(.is-in) .seg { flex-grow: .01; }
.week[data-reveal] .seg-zoom { transition-delay: .12s; }
.week[data-reveal] .seg-lms { transition-delay: .24s; }

/* FAQ: nội dung trượt xuống khi mở */
.faq details[open] p { animation: rise .35s ease both; }

/* Menu mobile mở mượt */
@keyframes drop { from { opacity: 0; transform: translateY(-8px); } }
@media (max-width: 1080px) { .nav.is-open { animation: drop .2s ease both; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  /* Không chạy dải học viên: cho cuộn ngang bằng tay, ẩn lượt lặp */
  .marquee { overflow-x: auto; -webkit-mask-image: none; mask-image: none; }
  .students .student[aria-hidden="true"] { display: none; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* Tin tức và bài viết */
.section-head-center { max-width: 820px; margin-inline: auto; text-align: center; }
.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.post {
  display: flex; flex-direction: column; height: 100%; overflow: hidden; text-decoration: none;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: 0 1px 2px rgb(44 35 97 / 5%);
  transition: transform .25s cubic-bezier(.2,.7,.2,1), box-shadow .25s ease, border-color .2s ease;
}
.post:hover { transform: translateY(-4px); border-color: transparent; box-shadow: 0 0 0 2px var(--violet), var(--shadow); }
.post-thumb { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: var(--paper); }
.post-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s cubic-bezier(.2,.7,.2,1); }
.post:hover .post-thumb img { transform: scale(1.05); }
.post-body { display: flex; flex-direction: column; gap: 8px; padding: 16px 18px 20px; }
.post-title { font: 700 17px/1.3 var(--font-display); color: var(--ink); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.post-excerpt { font-size: 14px; line-height: 1.55; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.posts-more { text-align: center; margin: 24px 0 0; }
@media (max-width: 960px) { .posts { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .posts { grid-template-columns: 1fr; } }

/* Foundation page: 2 giai đoạn */
.stages { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 16px 0 18px; }
.stage { position: relative; padding: 22px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); }
.stage:first-child { border-top: 4px solid var(--amber); }
.stage:last-child { border-top: 4px solid var(--crimson); }
.stage-range { display: flex; align-items: baseline; gap: 10px; margin: 0 0 10px; font: 800 28px/1 var(--font-display); color: var(--ink); letter-spacing: -.02em; }
.stage-range i { font-style: normal; color: var(--crimson); font-size: 22px; }
.content-block .stage h3 { font-size: 19px; margin: 0 0 10px; }
.stage > p { font-size: 15px; color: var(--muted); }
.stage > p strong { color: var(--ink); }
.stage-label { margin: 14px 0 2px !important; font-size: 12px !important; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--crimson) !important; }
@media (max-width: 760px) { .stages { grid-template-columns: 1fr; } }
.course-span-ends-3 .span-range { font-size: clamp(34px, 3.8vw, 48px); }
.course-span-ends-3 .span-range + * , .course-span-ends-3 .span-to b { letter-spacing: -.02em; }