:root {
  --teal: #82c9c9;
  --teal-soft: #e5f5f4;
  --orange: #f18e20;
  --orange-deep: #d97810;
  --orange-pale: #fff3e3;
  --red: #e84331;
  --magenta: #931a3f;
  --ink: #404f4e;
  --ink-soft: #657574;
  --cream: #fbfaf7;
  --paper: #ffffff;
  --line: #dedfd9;
  --green: #2f5d5b;
  --lime: #f18e20;
  --radius: 22px;
  --shadow: 0 24px 70px rgba(44, 35, 25, 0.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }

.skip-link { position: fixed; top: -60px; left: 16px; z-index: 100; padding: 12px 18px; background: var(--ink); color: white; border-radius: 10px; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 92px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(20px, 4vw, 72px);
  border-bottom: 1px solid transparent;
  background: rgba(130, 201, 201, 0.96);
  backdrop-filter: blur(18px);
  transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.scrolled { border-color: rgba(64,79,78,.16); box-shadow: 0 4px 28px rgba(64,79,78,.10); }
.brand { display: inline-flex; align-items: center; width: max-content; text-decoration: none; }
.brand-logo { display: block; width: 108px; height: auto; }
.desktop-nav { display: flex; gap: 34px; }
.desktop-nav a { position: relative; font-size: 14px; font-weight: 700; text-decoration: none; color: #315756; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 2px; background: var(--orange); transition: right .2s ease; }
.desktop-nav a:hover::after { right: 0; }
.header-actions { justify-self: end; display: flex; align-items: center; gap: 9px; }
.social-link { display: inline-grid; place-items: center; flex: 0 0 auto; width: 36px; height: 36px; border-radius: 50%; color: white; text-decoration: none; font-weight: 850; font-style: normal; line-height: 1; transition: transform .2s ease, box-shadow .2s ease; }
.social-link:hover { transform: translateY(-2px); box-shadow: 0 7px 18px rgba(50,70,69,.16); }
.social-facebook { background: #3b5998; font-family: Arial, sans-serif; font-size: 21px; }
.social-zalo { background: #0068ff; font-size: 9px; }
.menu-button, .mobile-nav { display: none; }

.section { padding: 112px clamp(20px, 6vw, 104px); }
.hero { min-height: calc(100svh - 92px); display: flex; align-items: center; overflow: hidden; padding-top: 72px; color: white; background-color: var(--green); background-image: linear-gradient(90deg, rgba(39,76,75,.97) 0%, rgba(39,76,75,.91) 42%, rgba(39,76,75,.55) 68%, rgba(39,76,75,.28) 100%), url('./rubik-classroom-hero.webp'); background-size: cover; background-position: center; }
.hero-grid { width: 100%; max-width: 1380px; margin: auto; display: grid; grid-template-columns: 1.03fr .97fr; gap: clamp(50px, 7vw, 110px); align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 8px 12px; border: 1px solid rgba(255,255,255,.32); border-radius: 999px; color: white; background: rgba(47,93,91,.55); backdrop-filter: blur(10px); font-size: 12px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--red); box-shadow: 0 0 0 5px rgba(232,67,49,.13); }
h1, h2, h3, h4, p { margin-top: 0; }
h1 { margin: 30px 0 28px; font-size: clamp(52px, 6.3vw, 94px); line-height: .94; letter-spacing: -.065em; font-weight: 840; }
h1 span { color: var(--orange); }
.hero-lede { max-width: 670px; color: rgba(255,255,255,.86); font-size: clamp(18px, 1.65vw, 23px); line-height: 1.55; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 36px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 18px; min-height: 54px; padding: 0 24px; border: 1px solid transparent; border-radius: 999px; cursor: pointer; text-decoration: none; font-weight: 750; font-size: 14px; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid #63a9ff; outline-offset: 3px; }
.button-primary { background: var(--orange); color: white; box-shadow: 0 12px 30px rgba(241,142,32,.22); }
.button-primary:hover { background: var(--orange-deep); box-shadow: 0 16px 35px rgba(241,142,32,.3); }
.button-dark { min-height: 42px; background: var(--red); color: white; }
.button-small { padding: 0 18px; font-size: 13px; }
.button-light { background: white; color: var(--ink); }
.button-outline-light { color: white; border-color: rgba(255,255,255,.34); background: transparent; }
.button-wide { width: 100%; margin-top: 8px; border-radius: 14px; }
.text-link { color: white; text-decoration: none; font-size: 14px; font-weight: 750; border-bottom: 1px solid rgba(255,255,255,.72); padding-bottom: 4px; }
.trust-line { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 44px; color: rgba(255,255,255,.78); font-size: 12px; }
.trust-line span::before { content: "✓"; margin-right: 7px; color: var(--orange); font-weight: 900; }

.hero-visual { position: relative; min-height: 620px; display: grid; place-items: center; }
.hero-card { position: relative; z-index: 2; width: min(100%, 500px); padding: 26px; border: 1px solid rgba(255,255,255,.20); border-radius: 32px; background: rgba(39,76,75,.88); backdrop-filter: blur(12px); color: white; box-shadow: 0 42px 90px rgba(21,49,48,.32); transform: rotate(-1.5deg); }
.hero-card::before { content: ""; position: absolute; inset: 10px; border: 1px solid rgba(255,255,255,.08); border-radius: 24px; pointer-events: none; }
.hero-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 34px; font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.day-pill { padding: 8px 10px; border-radius: 999px; background: var(--orange); color: white; font-size: 9px; }
.schedule-line { display: grid; grid-template-columns: 76px 1fr; align-items: center; gap: 18px; min-height: 98px; padding: 18px 12px; border-top: 1px solid rgba(255,255,255,.13); }
.schedule-line.highlighted { margin: 0 -8px; padding-inline: 20px; background: rgba(255,255,255,.07); border-radius: 14px; border-top-color: transparent; }
.time { font-size: 11px; letter-spacing: .08em; color: #c5d5cf; }
.schedule-copy span, .schedule-copy small { display: block; }
.schedule-copy span { font-size: 18px; font-weight: 750; }
.schedule-copy small { margin-top: 6px; color: #aebfb9; }
.impact-note { display: flex; gap: 14px; align-items: center; margin-top: 22px; padding: 18px; border-radius: 16px; color: var(--ink); background: var(--teal); font-size: 13px; line-height: 1.45; }
.impact-note svg { flex: 0 0 34px; width: 34px; fill: none; stroke: var(--ink); stroke-width: 1.6; stroke-linecap: round; }
.orbit { position: absolute; border-radius: 50%; border: 1px solid rgba(147,26,63,.20); }
.orbit-one { width: 520px; height: 520px; }
.orbit-two { width: 690px; height: 690px; opacity: .55; }
.floating-note { position: absolute; z-index: 3; min-width: 166px; padding: 14px 17px; border-radius: 15px; background: white; box-shadow: 0 18px 45px rgba(40,35,30,.14); }
.floating-note span, .floating-note small { display: block; }
.floating-note span { font-weight: 800; font-size: 14px; }
.floating-note small { margin-top: 4px; color: #758079; font-size: 10px; text-transform: uppercase; letter-spacing: .06em; }
.note-one { top: 82px; right: -5px; transform: rotate(3deg); }
.note-two { bottom: 72px; left: -20px; transform: rotate(-4deg); }

.opportunity { background: white; }
.section-intro { max-width: 1380px; margin: auto; display: grid; grid-template-columns: 1.1fr .7fr; gap: 12%; align-items: end; }
.kicker { margin-bottom: 24px; color: var(--orange); font-size: 11px; font-weight: 850; letter-spacing: .16em; }
.kicker.light { color: var(--lime); }
h2 { margin-bottom: 0; font-size: clamp(38px, 4vw, 62px); line-height: 1.04; letter-spacing: -.045em; }
.section-intro > p { margin: 0; color: var(--ink-soft); font-size: 17px; line-height: 1.65; }
.principles-grid { max-width: 1380px; margin: 60px auto 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.principle-card { min-height: 320px; padding: 28px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); background: #fdfcf9; overflow: hidden; }
.featured-card { background: var(--orange-pale); border-color: #ffd2bf; }
.card-number { color: var(--orange); font-size: 10px; font-weight: 900; letter-spacing: .14em; }
.principle-card h3 { margin: auto 0 12px; font-size: 27px; letter-spacing: -.03em; }
.principle-card p { margin-bottom: 24px; color: var(--ink-soft); line-height: 1.55; }
.mini-calendar { display: flex; gap: 7px; }
.mini-calendar span { flex: 1; display: grid; place-items: center; height: 38px; border-radius: 9px; background: white; color: #7c827e; font-size: 10px; font-weight: 800; }
.mini-calendar .active { background: var(--orange); color: white; }
.card-icon { width: 122px; height: 74px; fill: none; stroke: var(--orange); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.speech-cluster { display: flex; flex-wrap: wrap; gap: 7px; }
.speech-cluster span { padding: 9px 12px; border-radius: 999px; color: white; background: var(--green); font-size: 11px; font-weight: 700; }
.speech-cluster span:nth-child(2) { background: var(--red); }
.speech-cluster span:nth-child(3) { color: white; background: var(--magenta); }
.priority-strip { max-width: 1380px; margin: 18px auto 0; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.priority-card { display: grid; grid-template-columns: 58px 1fr; gap: 20px; align-items: start; padding: 28px; border: 1px solid transparent; border-radius: var(--radius); }
.permit-card { background: #fff3e3; border-color: #f7d9ad; }
.local-card { background: var(--teal-soft); border-color: #b7dedc; }
.priority-icon { display: grid; place-items: center; width: 58px; height: 58px; border-radius: 16px; color: white; background: var(--magenta); font-size: 13px; font-weight: 900; letter-spacing: .05em; transform: rotate(-2deg); }
.local-card .priority-icon { background: var(--red); transform: rotate(2deg); }
.priority-label { display: block; margin: 2px 0 10px; color: var(--orange-deep); font-size: 9px; font-weight: 900; letter-spacing: .14em; }
.local-card .priority-label { color: #38706e; }
.priority-card h3 { margin-bottom: 9px; font-size: 21px; letter-spacing: -.025em; }
.priority-card p { margin: 0; color: var(--ink-soft); font-size: 13px; line-height: 1.58; }

.details-shell { max-width: 1380px; margin: 72px auto 0; border: 1px solid var(--line); border-radius: 28px; overflow: hidden; }
.details-tabs { display: grid; grid-template-columns: repeat(4, 1fr); padding: 8px; background: #f3f1ec; border-bottom: 1px solid var(--line); }
.details-tabs button { min-height: 54px; border: 0; border-radius: 14px; background: transparent; color: var(--ink-soft); cursor: pointer; font-size: 13px; font-weight: 760; }
.details-tabs button[aria-selected="true"] { background: white; color: var(--ink); box-shadow: 0 4px 15px rgba(24,31,27,.06); }
.detail-panel { padding: 48px; background: white; }
.detail-heading { display: grid; grid-template-columns: 42px 1fr; gap: 18px; max-width: 720px; }
.detail-index { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; color: white; background: var(--orange); font-size: 12px; font-weight: 900; }
.detail-heading h3 { margin-bottom: 8px; font-size: 27px; letter-spacing: -.025em; }
.detail-heading p { color: var(--ink-soft); }
.detail-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 36px; }
.detail-block { padding: 24px; border-radius: 16px; background: var(--cream); }
.detail-block small, .detail-block strong { display: block; }
.detail-block small { margin-bottom: 12px; color: var(--orange); font-size: 9px; font-weight: 900; letter-spacing: .15em; }
.detail-block strong { margin-bottom: 10px; font-size: 22px; }
.detail-block p, .detail-note { color: var(--ink-soft); font-size: 13px; line-height: 1.55; }
.detail-block p { margin: 0; }
.detail-note { margin: 22px 0 0; padding-top: 20px; border-top: 1px solid var(--line); }
.role-list { margin-top: 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.role-list article { display: grid; grid-template-columns: 46px 1fr; gap: 14px; align-items: center; padding: 17px; border: 1px solid var(--line); border-radius: 14px; }
.role-list article > span { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px; background: var(--orange-pale); color: var(--orange-deep); font-size: 10px; font-weight: 900; }
.role-list h4 { margin-bottom: 5px; font-size: 15px; }
.role-list p { margin: 0; color: var(--ink-soft); font-size: 12px; line-height: 1.45; }
.process-list { list-style: none; margin: 30px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.process-list li { padding: 21px; border-radius: 14px; background: var(--cream); }
.process-list li > span { color: var(--orange); font-size: 10px; font-weight: 900; }
.process-list h4 { margin: 42px 0 8px; font-size: 16px; }
.process-list p { margin: 0; color: var(--ink-soft); font-size: 12px; line-height: 1.5; }
.policy-grid { margin-top: 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.policy-grid article { padding: 22px; border-left: 3px solid var(--orange); background: var(--cream); }
.policy-grid h4 { margin-bottom: 8px; }
.policy-grid p { margin: 0; color: var(--ink-soft); font-size: 13px; line-height: 1.55; }

.fit-section { color: white; background-color: #274c4b; background-image: linear-gradient(145deg, rgba(49,95,93,.95), rgba(39,76,75,.96)), url('./rubik-classroom-fit.webp'); background-size: cover; background-position: center; background-attachment: fixed; }
.fit-heading { max-width: 780px; margin: 0 auto 56px; text-align: center; }
.fit-heading > p:last-child { max-width: 640px; margin: 22px auto 0; color: #b8c8c2; font-size: 16px; line-height: 1.6; }
.fit-app { max-width: 1180px; margin: auto; display: grid; grid-template-columns: 1.08fr .92fr; border-radius: 28px; overflow: hidden; background: white; box-shadow: 0 36px 90px rgba(0,0,0,.22); }
.fit-form { padding: 42px; color: var(--ink); }
.step-label { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; color: #7c857f; font-size: 10px; font-weight: 900; letter-spacing: .13em; }
.step-label span:first-child { padding: 6px 8px; border-radius: 6px; color: var(--orange-deep); background: var(--orange-pale); }
.commitments-label { margin-top: 34px; }
fieldset { margin: 0; padding: 0; border: 0; }
legend { width: 100%; margin-bottom: 18px; font-size: 22px; font-weight: 800; letter-spacing: -.02em; }
.profile-options { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.profile-options legend { grid-column: 1 / -1; }
.profile-options label, .check-options label { position: relative; display: flex; cursor: pointer; }
.profile-options input, .check-options input { position: absolute; opacity: 0; pointer-events: none; }
.profile-options label > span { width: 100%; min-height: 72px; padding: 16px 16px 14px 48px; border: 1px solid var(--line); border-radius: 13px; background: white; transition: border .2s, background .2s, box-shadow .2s; }
.profile-options label > span::before { content: ""; position: absolute; top: 25px; left: 17px; width: 17px; height: 17px; border: 1.5px solid #aeb5b0; border-radius: 50%; }
.profile-options label > span::after { content: ""; position: absolute; top: 30px; left: 22px; width: 9px; height: 9px; border-radius: 50%; background: var(--orange); transform: scale(0); transition: transform .15s; }
.profile-options input:checked + span { border-color: var(--orange); background: var(--orange-pale); box-shadow: inset 0 0 0 1px var(--orange); }
.profile-options input:checked + span::after { transform: scale(1); }
.profile-options input:focus-visible + span, .check-options input:focus-visible + span { outline: 3px solid #63a9ff; outline-offset: 2px; }
.profile-options b, .profile-options small { display: block; }
.profile-options b { font-size: 13px; }
.profile-options small { margin-top: 5px; color: #78817b; font-size: 10px; }
.check-options { display: grid; gap: 8px; }
.check-options legend { margin-bottom: 14px; font-size: 18px; }
.check-options label > span { width: 100%; padding: 13px 14px 13px 44px; border: 1px solid var(--line); border-radius: 11px; color: #4d5851; font-size: 12px; line-height: 1.4; }
.check-options label > span::before { content: ""; position: absolute; top: 50%; left: 15px; width: 16px; height: 16px; transform: translateY(-50%); border: 1.5px solid #aeb5b0; border-radius: 5px; }
.check-options input:checked + span { border-color: #ffb294; background: #fff8f4; color: var(--ink); }
.check-options input:checked + span::before { border-color: var(--orange); background: var(--orange); }
.check-options input:checked + span::after { content: "✓"; position: absolute; top: 50%; left: 18px; transform: translateY(-55%); color: white; font-size: 10px; font-weight: 900; }
.form-message { min-height: 18px; margin: 10px 0 -8px; color: #b13b14; font-size: 12px; text-align: center; }

.fit-result { min-height: 720px; display: grid; place-items: center; padding: 42px; background: #294f4d; color: white; }
.result-idle { max-width: 370px; text-align: center; }
.idle-orbit { width: 118px; height: 118px; display: grid; place-items: center; margin: 0 auto 30px; border: 1px solid rgba(241,142,32,.34); border-radius: 50%; box-shadow: 0 0 0 18px rgba(241,142,32,.05), 0 0 0 38px rgba(130,201,201,.035); }
.idle-orbit span { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 16px; color: white; background: var(--orange); font-size: 26px; font-weight: 900; transform: rotate(6deg); }
.result-idle h3 { font-size: 25px; }
.result-idle > p { color: #adc0b9; line-height: 1.6; }
.result-idle ul { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 26px 0 0; padding: 0; list-style: none; }
.result-idle li { padding: 10px; border: 1px solid rgba(255,255,255,.1); border-radius: 8px; color: #c7d4cf; font-size: 10px; }
.result-content { width: 100%; }
.score-ring { width: 96px; height: 96px; display: grid; place-items: center; align-content: center; margin-bottom: 28px; border: 5px solid var(--lime); border-radius: 50%; box-shadow: inset 0 0 0 5px rgba(201,242,124,.12); }
.score-ring span, .score-ring small { display: block; }
.score-ring span { font-size: 22px; font-weight: 900; }
.score-ring small { margin-top: 2px; color: #b5c6c0; font-size: 8px; letter-spacing: .13em; }
.result-overline { margin-bottom: 7px; color: var(--lime); font-size: 9px; font-weight: 900; letter-spacing: .15em; }
.result-content h3 { margin-bottom: 10px; font-size: 32px; letter-spacing: -.035em; }
.result-content > p { color: #b7c7c1; font-size: 13px; line-height: 1.55; }
.gap-box, .prep-box { margin-top: 22px; padding: 18px; border-radius: 14px; background: rgba(255,255,255,.07); }
.gap-box > span, .prep-box > div > span { display: block; color: var(--lime); font-size: 9px; font-weight: 900; letter-spacing: .13em; }
.gap-box ul, .prep-box ul { margin: 12px 0 0; padding-left: 18px; color: #d7e1dd; font-size: 11px; line-height: 1.6; }
.prep-box > div { display: flex; justify-content: space-between; gap: 14px; }
.prep-box small { color: #91a49d; font-size: 9px; }
.result-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin-top: 22px; }
.result-actions .button { min-height: 45px; padding-inline: 12px; font-size: 11px; }
.copy-status { min-height: 16px; margin: 8px 0 0 !important; color: var(--lime) !important; font-size: 10px !important; text-align: center; }

.faq-section { background: var(--cream); }
.faq-grid { max-width: 1240px; margin: auto; display: grid; grid-template-columns: .78fr 1.22fr; gap: 11%; align-items: start; }
.faq-intro { position: sticky; top: 118px; }
.faq-intro > p:not(.kicker) { margin-top: 24px; color: var(--ink-soft); line-height: 1.6; }
.privacy-card { display: flex; gap: 14px; align-items: center; margin-top: 34px; padding: 16px; border: 1px solid #cdd8d2; border-radius: 14px; background: white; }
.privacy-card svg { width: 27px; height: 27px; fill: none; stroke: var(--green); stroke-width: 1.7; }
.privacy-card strong, .privacy-card span { display: block; }
.privacy-card strong { font-size: 13px; }
.privacy-card span { margin-top: 3px; color: var(--ink-soft); font-size: 10px; }
.accordion { border-top: 1px solid #cdd0cb; }
.faq-item { border-bottom: 1px solid #cdd0cb; }
.faq-item button { width: 100%; display: grid; grid-template-columns: 1fr 26px; gap: 20px; align-items: center; padding: 27px 0; border: 0; background: transparent; color: var(--ink); cursor: pointer; text-align: left; font-size: 18px; font-weight: 750; }
.faq-item i { position: relative; width: 24px; height: 24px; border: 1px solid #a9afab; border-radius: 50%; }
.faq-item i::before, .faq-item i::after { content: ""; position: absolute; top: 50%; left: 50%; width: 8px; height: 1px; background: var(--ink); transform: translate(-50%, -50%); transition: transform .2s; }
.faq-item i::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item.open i { border-color: var(--orange); background: var(--orange); }
.faq-item.open i::before, .faq-item.open i::after { background: white; }
.faq-item.open i::after { transform: translate(-50%, -50%) rotate(0); }
.faq-answer { overflow: hidden; }
.faq-answer p { max-width: 650px; margin: -6px 50px 27px 0; color: var(--ink-soft); line-height: 1.65; }
.cta-panel { max-width: 1380px; margin: 100px auto 0; display: grid; grid-template-columns: 1.15fr .85fr; align-items: end; gap: 60px; padding: clamp(34px, 5vw, 68px); border-radius: 28px; color: white; overflow: hidden; position: relative; background-color: var(--red); background-image: linear-gradient(90deg, rgba(232,67,49,.97), rgba(147,26,63,.86)), url('./rubik-classroom-cta.webp'); background-size: cover; background-position: center 28%; }
.cta-panel::after { content: ""; position: absolute; width: 360px; height: 360px; right: -130px; top: -160px; border: 1px solid rgba(255,255,255,.28); border-radius: 50%; box-shadow: 0 0 0 50px rgba(255,255,255,.04), 0 0 0 100px rgba(255,255,255,.03); }
.cta-copy, .cta-actions { position: relative; z-index: 1; }
.cta-copy h2 { max-width: 720px; }
.cta-copy > p:last-child { max-width: 610px; margin: 22px 0 0; color: #fff3ed; line-height: 1.6; }
.cta-actions { display: grid; justify-items: start; gap: 20px; }
.cta-socials { display: flex; flex-wrap: wrap; gap: 10px; }
.cta-socials > a { display: inline-flex; align-items: center; gap: 9px; padding: 7px 14px 7px 7px; border: 1px solid rgba(255,255,255,.30); border-radius: 999px; color: white; text-decoration: none; font-size: 11px; font-weight: 750; }
.cta-socials .social-link { width: 30px; height: 30px; }
.cta-socials .social-facebook { font-size: 18px; }
.cta-socials .social-zalo { font-size: 8px; }
.contact-inline { color: white; text-underline-offset: 5px; font-size: 15px; font-weight: 700; line-height: 1.5; }

.site-footer { display: grid; grid-template-columns: 1fr auto 1fr; gap: 40px; align-items: center; padding: 42px clamp(20px, 6vw, 104px); border-top: 1px solid rgba(64,79,78,.12); background: var(--teal); }
.footer-contact { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 22px; }
.footer-contact a { color: var(--ink-soft); font-size: clamp(14px, 1.15vw, 16px); font-weight: 650; line-height: 1.5; text-decoration: none; }
.footer-contact a:hover { color: var(--orange); }
.footer-hotline { display: inline-flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 7px; color: var(--ink-soft); }
.site-footer > p { justify-self: end; margin: 0; color: #486462; font-size: 10px; line-height: 1.5; text-align: right; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal-delay { transition-delay: .14s; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1040px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 80px; }
  .hero-copy { text-align: center; }
  .hero-lede { margin-inline: auto; }
  .hero-actions, .trust-line { justify-content: center; }
  .hero-visual { min-height: 590px; width: min(650px, 100%); margin-inline: auto; }
  .section-intro { grid-template-columns: 1fr; gap: 28px; }
  .section-intro > p { max-width: 700px; }
  .principle-card { min-height: 280px; }
  .process-list { grid-template-columns: 1fr 1fr; }
  .fit-app { grid-template-columns: 1fr; max-width: 760px; }
  .fit-result { min-height: auto; }
  .faq-grid { gap: 7%; }
  .site-footer { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .site-footer > p { justify-self: center; text-align: center; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 78px; }
  .site-header { height: 74px; grid-template-columns: 1fr auto; padding-inline: 18px; }
  .brand-logo { width: 82px; }
  .desktop-nav, .header-actions { display: none; }
  .menu-button { width: 42px; height: 42px; display: grid; align-content: center; gap: 6px; padding: 0 10px; border: 0; border-radius: 50%; background: var(--ink); }
  .menu-button span { display: block; width: 100%; height: 1.5px; background: white; transition: transform .2s; }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(3.7px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:last-child { transform: translateY(-3.7px) rotate(-45deg); }
  .mobile-nav { position: fixed; inset: 74px 0 auto; display: grid; gap: 1px; padding: 16px 18px 26px; background: var(--teal); border-bottom: 1px solid rgba(64,79,78,.16); box-shadow: 0 20px 35px rgba(64,79,78,.15); }
  .mobile-nav a { padding: 16px; border-radius: 12px; background: white; text-decoration: none; font-weight: 750; }
  .mobile-socials { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 8px; }
  .mobile-socials a { padding: 13px; color: white; background: #315f5d; font-size: 12px; text-align: center; }
  .section { padding: 78px 18px; }
  .hero { min-height: auto; padding-top: 66px; background-image: linear-gradient(rgba(39,76,75,.92), rgba(39,76,75,.86)), url('./rubik-classroom-hero.webp'); background-position: 42% center; }
  h1 { margin-top: 24px; font-size: clamp(46px, 14vw, 68px); }
  .hero-lede { font-size: 17px; }
  .hero-actions { display: grid; gap: 22px; }
  .trust-line { gap: 10px 16px; margin-top: 34px; }
  .hero-visual { min-height: 480px; margin-top: 30px; }
  .hero-card { width: calc(100% - 14px); padding: 20px; border-radius: 24px; }
  .hero-card-top { margin-bottom: 24px; }
  .schedule-line { grid-template-columns: 62px 1fr; gap: 10px; min-height: 84px; }
  .schedule-copy span { font-size: 15px; }
  .impact-note { padding: 14px; font-size: 11px; }
  .orbit-one { width: 390px; height: 390px; }
  .orbit-two { width: 510px; height: 510px; }
  .floating-note { display: none; }
  h2 { font-size: 39px; }
  .principles-grid { grid-template-columns: 1fr; margin-top: 38px; }
  .principle-card { min-height: 250px; }
  .priority-strip { grid-template-columns: 1fr; }
  .priority-card { grid-template-columns: 48px 1fr; padding: 22px 18px; gap: 15px; }
  .priority-icon { width: 48px; height: 48px; border-radius: 13px; }
  .details-shell { margin-top: 46px; border-radius: 20px; }
  .details-tabs { grid-template-columns: 1fr 1fr; gap: 5px; }
  .details-tabs button { min-height: 46px; }
  .detail-panel { padding: 28px 20px; }
  .detail-heading { grid-template-columns: 36px 1fr; gap: 13px; }
  .detail-index { width: 36px; height: 36px; }
  .detail-heading h3 { font-size: 22px; }
  .detail-columns, .role-list, .policy-grid, .process-list { grid-template-columns: 1fr; }
  .process-list h4 { margin-top: 18px; }
  .fit-heading { text-align: left; margin-bottom: 38px; }
  .fit-section { background-attachment: scroll; background-position: 58% center; }
  .fit-heading > p:last-child { margin-left: 0; }
  .fit-app { border-radius: 20px; }
  .fit-form, .fit-result { padding: 28px 20px; }
  .profile-options { grid-template-columns: 1fr; }
  .profile-options label > span { min-height: 68px; }
  .fit-result { min-height: 500px; }
  .result-actions { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; gap: 48px; }
  .faq-intro { position: static; }
  .faq-item button { font-size: 16px; }
  .faq-answer p { margin-right: 36px; font-size: 14px; }
  .cta-panel { grid-template-columns: 1fr; gap: 36px; margin-top: 70px; padding: 32px 22px; border-radius: 20px; }
  .cta-actions { width: 100%; }
  .cta-actions .button { width: 100%; }
  .cta-socials { display: grid; width: 100%; }
  .cta-socials > a { justify-content: flex-start; }
  .site-footer { gap: 26px; padding-block: 34px; }
  .footer-contact { display: grid; gap: 12px; }
}

@media (max-width: 390px) {
  .hero-card-top { align-items: flex-start; gap: 10px; }
  .day-pill { text-align: center; }
  .score-ring { width: 84px; height: 84px; }
}