:root {
  color-scheme: light;
  --ink: #17211c;
  --muted: #66716b;
  --cream: #f7f5ed;
  --paper: #fffef9;
  --line: #dfe3dc;
  --green: #195a43;
  --green-dark: #103e30;
  --mint: #cce8d7;
  --lime: #d6ed83;
  --blue: #d9e9f4;
  --orange: #e78455;
  --shadow: 0 28px 70px rgba(19, 43, 33, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--cream); font-family: "DM Sans", sans-serif; }
a { color: inherit; text-decoration: none; }
p { margin-top: 0; color: var(--muted); font-size: 17px; line-height: 1.65; }
h1, h2, h3 { margin-top: 0; font-family: Manrope, sans-serif; letter-spacing: -.045em; }

.site-header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 16px clamp(22px, 5vw, 76px); background: rgba(247, 245, 237, .9); border-bottom: 1px solid rgba(23, 33, 28, .09); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: Manrope, sans-serif; font-weight: 800; }
.brand-mark { display: grid; width: 39px; height: 39px; place-items: center; color: var(--cream); background: var(--green); border-radius: 50% 50% 50% 12px; font-size: 13px; letter-spacing: -.04em; }
.brand-copy { line-height: .95; }
.brand-copy > span { display: block; color: var(--green); }
.nav { display: flex; align-items: center; gap: 26px; color: #536059; font-size: 14px; font-weight: 700; }
.nav a:hover { color: var(--green); }
.nav-cta { padding: 11px 17px; color: white !important; background: var(--green); border-radius: 999px; }

.hero { display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(380px, .98fr); align-items: center; gap: clamp(44px, 7vw, 104px); min-height: 720px; padding: clamp(62px, 8vw, 112px) clamp(22px, 6vw, 94px); overflow: hidden; }
.hero-copy { position: relative; z-index: 2; max-width: 690px; }
.eyebrow { display: flex; align-items: center; gap: 9px; margin-bottom: 17px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.eyebrow > span { width: 25px; height: 2px; background: var(--orange); }
h1 { max-width: 720px; margin-bottom: 24px; font-size: clamp(46px, 6.2vw, 82px); line-height: .99; }
h1 em { color: var(--green); font-style: normal; }
.hero-text { max-width: 620px; font-size: clamp(18px, 2vw, 21px); }
.hero-text strong { color: var(--ink); }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; margin-top: 31px; }
.button { display: inline-flex; min-height: 52px; align-items: center; justify-content: center; gap: 18px; padding: 14px 22px; border-radius: 7px; font-weight: 800; transition: transform .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: white; background: var(--green); box-shadow: 0 14px 30px rgba(25, 90, 67, .22); }
.button.primary:hover { background: var(--green-dark); }
.text-link { padding-bottom: 4px; color: var(--green); border-bottom: 1px solid var(--green); font-size: 15px; font-weight: 700; }
.trust-line { display: flex; align-items: center; gap: 13px; margin-top: 34px; }
.trust-line p { margin: 0; font-size: 14px; }
.avatars { display: flex; padding-left: 7px; }
.avatars span { display: grid; width: 34px; height: 34px; place-items: center; margin-left: -7px; color: var(--green-dark); background: var(--lime); border: 3px solid var(--cream); border-radius: 50%; font-size: 11px; font-weight: 800; }
.avatars span:nth-child(2) { background: var(--blue); }
.avatars span:nth-child(3) { background: #f3c5ae; }

.study-desk { position: relative; min-height: 500px; background: var(--paper); border: 1px solid rgba(23, 33, 28, .12); border-radius: 16px; box-shadow: var(--shadow); transform: rotate(1.2deg); }
.study-desk::before { content: ""; position: absolute; width: 180px; height: 180px; right: -80px; top: -70px; z-index: -1; background: var(--lime); border-radius: 50%; }
.study-desk::after { content: ""; position: absolute; width: 130px; height: 130px; left: -52px; bottom: -48px; z-index: -1; border: 22px solid var(--blue); border-radius: 50%; }
.window-bar { display: flex; align-items: center; gap: 7px; height: 52px; padding: 0 19px; color: #77817b; background: #f2f2ec; border-bottom: 1px solid var(--line); border-radius: 16px 16px 0 0; font-size: 12px; font-weight: 700; }
.window-bar i { width: 8px; height: 8px; background: #ef8f68; border-radius: 50%; }
.window-bar i:nth-child(2) { background: #e4c35e; }
.window-bar i:nth-child(3) { margin-right: 7px; background: #75ba8a; }
.lesson-body { padding: clamp(28px, 4vw, 48px); }
.lesson-topline { display: flex; justify-content: space-between; color: var(--muted); font-size: 12px; font-weight: 700; text-transform: uppercase; }
.lesson-topline b { color: var(--orange); }
.formula { display: flex; align-items: center; justify-content: center; gap: 13px; margin: 64px 0 42px; font-family: Georgia, serif; font-size: clamp(26px, 3vw, 38px); font-style: italic; }
.formula small { align-self: flex-end; margin-left: -12px; font-size: 12px; }
.fraction { padding-top: 7px; border-top: 2px solid var(--ink); }
.solution { margin: 13px 0; padding: 13px 16px; background: #f4f6f1; border-radius: 7px; color: #46524b; font-size: 14px; }
.solution > span { margin-right: 9px; color: var(--green); font-weight: 800; }
.teacher-note { margin-top: 29px; padding: 17px 18px; color: var(--green-dark); background: var(--mint); border-left: 3px solid var(--green); font-family: Georgia, serif; font-size: 16px; font-style: italic; }
.floating-card { position: absolute; padding: 14px 17px; background: white; border: 1px solid var(--line); border-radius: 9px; box-shadow: 0 15px 35px rgba(20, 42, 32, .15); transform: rotate(-3deg); }
.floating-card span, .floating-card strong { display: block; }
.floating-card span { margin-bottom: 5px; color: var(--muted); font-size: 10px; font-weight: 700; text-transform: uppercase; }
.floating-card strong { font-size: 13px; }
.exam-card { right: -36px; top: 94px; }
.exam-card i { display: block; width: 115px; height: 5px; margin-top: 10px; overflow: hidden; background: #e9ece6; border-radius: 5px; }
.exam-card i b { display: block; width: 68%; height: 100%; background: var(--orange); }
.material-card { left: -35px; bottom: 44px; transform: rotate(2deg); }

.university-strip { padding: 30px clamp(22px, 6vw, 94px); text-align: center; background: var(--green-dark); }
.university-strip p { margin-bottom: 15px; color: rgba(255,255,255,.62); font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.university-strip div { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: clamp(23px, 4vw, 58px); color: white; }
.university-strip strong { font-family: Manrope, sans-serif; font-size: clamp(16px, 2vw, 22px); }
.university-strip strong:last-child { color: var(--mint); font-size: 14px; }
.university-strip small { display: block; margin-top: 15px; color: rgba(255,255,255,.42); font-size: 10px; }

.section { padding: clamp(72px, 9vw, 124px) clamp(22px, 6vw, 94px); }
.section-heading { display: grid; grid-template-columns: 1fr .72fr; align-items: end; gap: 50px; margin-bottom: 44px; }
h2 { margin-bottom: 18px; font-size: clamp(37px, 5vw, 60px); line-height: 1.05; }
.section-heading p:last-child { max-width: 550px; margin-bottom: 4px; }
.subject-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.subject-card { position: relative; min-height: 460px; padding: clamp(28px, 4vw, 48px); overflow: hidden; border: 1px solid rgba(23,33,28,.1); border-radius: 10px; }
.math-card { background: var(--mint); }
.chemistry-card { background: var(--blue); }
.physics-card { background: #f3d9c9; }
.card-icon { position: absolute; right: 25px; top: 18px; color: rgba(25,90,67,.12); font-family: Georgia, serif; font-size: 100px; font-weight: 700; }
.card-kicker { margin-bottom: 24px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.subject-card h3 { position: relative; max-width: 470px; margin-bottom: 31px; font-size: clamp(27px, 3vw, 38px); line-height: 1.15; }
.subject-card ul { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.subject-card li { padding: 10px 0 10px 27px; border-bottom: 1px solid rgba(23,33,28,.12); background: radial-gradient(circle at 5px 50%, var(--green) 0 3px, transparent 4px); color: #38473f; }
.card-link { display: inline-block; margin-top: 25px; color: var(--green-dark); border-bottom: 1px solid currentColor; font-size: 14px; font-weight: 800; }

.blog-preview { background: var(--paper); }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.article-grid article { padding: 30px; background: var(--cream); border: 1px solid var(--line); border-radius: 9px; }
.article-grid article > span { color: var(--orange); font-size: 11px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.article-grid h3 { margin: 16px 0 12px; font-size: 24px; line-height: 1.2; }
.article-grid a { color: var(--green); font-weight: 800; }
.blog-all { display: table; margin: 34px auto 0; }

.province-section { background: #edf3e9; }
.province-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.province-grid a { display: grid; min-height: 150px; padding: 22px; background: var(--paper); border: 1px solid var(--line); border-radius: 9px; transition: transform .18s ease, border-color .18s ease; }
.province-grid a:hover { transform: translateY(-3px); border-color: var(--green); }
.province-grid span { color: var(--orange); font-size: 11px; font-weight: 800; }
.province-grid strong { align-self: center; font-family: Manrope, sans-serif; font-size: 21px; }
.province-grid small { align-self: end; color: var(--green); font-weight: 800; }

.method { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(55px, 9vw, 130px); color: white; background: var(--green); }
.eyebrow.light { color: var(--lime); }
.method-intro h2 { max-width: 590px; }
.method-intro > p:not(.eyebrow) { max-width: 550px; color: rgba(255,255,255,.7); }
.light-button { margin-top: 20px; color: var(--green-dark); background: var(--lime); }
.method-steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.18); }
.method-steps li { display: grid; grid-template-columns: 52px 1fr; gap: 24px; padding: 25px 0; border-bottom: 1px solid rgba(255,255,255,.18); }
.method-steps li > span { color: var(--lime); font-family: Manrope, sans-serif; font-size: 13px; font-weight: 800; }
.method-steps strong { display: block; margin-bottom: 5px; font-size: 19px; }
.method-steps p { margin: 0; color: rgba(255,255,255,.63); font-size: 15px; }

.university-focus { display: grid; grid-template-columns: 1fr .8fr; align-items: center; gap: clamp(50px, 9vw, 125px); background: var(--paper); }
.focus-copy > p:not(.eyebrow) { max-width: 660px; }
.focus-points { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 27px; }
.focus-points span { padding: 8px 13px; color: var(--green-dark); background: #edf3e9; border-radius: 999px; font-size: 13px; font-weight: 700; }
blockquote { position: relative; margin: 0; padding: clamp(32px, 5vw, 58px); background: var(--cream); border-radius: 8px; }
blockquote p { margin: 20px 0 27px; color: var(--green-dark); font-family: Georgia, serif; font-size: clamp(23px, 3vw, 32px); line-height: 1.35; }
.quote-mark { color: var(--orange); font-family: Georgia, serif; font-size: 70px; line-height: .5; }
blockquote footer { color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }

.faq { display: grid; grid-template-columns: .7fr 1.3fr; gap: clamp(45px, 8vw, 110px); }
.faq-heading { position: sticky; top: 110px; align-self: start; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 23px 4px; cursor: pointer; font-family: Manrope, sans-serif; font-size: 18px; font-weight: 700; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; color: var(--green); font-size: 26px; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { padding: 0 40px 24px 4px; }

.contact { display: flex; align-items: center; justify-content: space-between; gap: 50px; margin: 0 clamp(22px, 6vw, 94px) clamp(40px, 6vw, 84px); padding: clamp(38px, 6vw, 70px); color: white; background: var(--green-dark); border-radius: 12px; }
.contact h2 { max-width: 770px; margin-bottom: 13px; }
.contact p:not(.eyebrow) { margin-bottom: 0; color: rgba(255,255,255,.68); }
.contact-button { flex: 0 0 auto; color: var(--green-dark); background: var(--lime); }
.site-footer { display: flex; align-items: center; gap: 28px; padding: 30px clamp(22px, 6vw, 94px); background: #0d2d23; }
.footer-brand { color: white; }
.site-footer p { flex: 1; margin: 0; color: rgba(255,255,255,.55); font-size: 13px; }
.site-footer nav { display: flex; gap: 20px; color: rgba(255,255,255,.72); font-size: 13px; font-weight: 700; }
.mega-footer { display: grid; grid-template-columns: 1.45fr repeat(4, 1fr); align-items: start; gap: clamp(28px, 4vw, 58px); padding-top: 58px; padding-bottom: 58px; color: white; }
.mega-footer > div { display: grid; gap: 10px; }
.mega-footer > div > strong { margin-bottom: 8px; color: var(--lime); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.mega-footer > div > a:not(.brand) { color: rgba(255,255,255,.68); font-size: 13px; line-height: 1.4; }
.mega-footer > div > a:hover { color: white; }
.footer-about p { max-width: 320px; margin: 12px 0 0; }
.network-strip { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 10px 24px; padding: 14px 22px; color: rgba(255,255,255,.68); background: #081f18; border-top: 1px solid rgba(255,255,255,.08); font-size: 12px; }
.network-strip span { color: var(--lime); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.network-strip a { color: rgba(255,255,255,.78); font-weight: 700; }
.network-strip a:hover { color: white; }

.inner-hero { padding: clamp(70px, 9vw, 120px) clamp(22px, 6vw, 94px) clamp(60px, 8vw, 100px); background: var(--paper); }
.inner-hero .breadcrumb { margin-bottom: 35px; color: var(--green); font-size: 13px; font-weight: 700; }
.inner-hero h1 { max-width: 1000px; }
.inner-hero .hero-text { max-width: 760px; }
.content-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: clamp(50px, 8vw, 110px); max-width: 1250px; margin: 0 auto; padding: clamp(65px, 8vw, 105px) clamp(22px, 5vw, 70px); }
.article-content { min-width: 0; }
.article-content h2 { margin-top: 55px; font-size: clamp(30px, 4vw, 44px); }
.article-content h3 { margin-top: 35px; font-size: 25px; }
.article-content p, .article-content li { font-size: 18px; line-height: 1.75; }
.article-content ul, .article-content ol { padding-left: 24px; }
.article-content li { margin-bottom: 10px; color: #47544d; }
.article-content .lead-box { margin: 35px 0; padding: 25px 28px; background: var(--mint); border-left: 4px solid var(--green); }
.article-content .lead-box p { margin: 0; color: var(--green-dark); }
.source-note { margin-top: 30px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 14px !important; }
.source-note a { color: var(--green); font-weight: 800; text-decoration: underline; text-underline-offset: 3px; }
.article-meta { margin-top: 24px; color: var(--muted); font-size: 13px; font-weight: 700; }
.content-sidebar { align-self: start; position: sticky; top: 100px; display: grid; gap: 15px; padding: 25px; background: var(--paper); border: 1px solid var(--line); border-radius: 9px; }
.content-sidebar strong { font-family: Manrope, sans-serif; }
.content-sidebar a { color: var(--green); font-size: 14px; font-weight: 700; }
.content-sidebar .button { color: white; }
.topic-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 35px; }
.topic-links a { padding: 20px; color: var(--green-dark); background: #edf3e9; border-radius: 8px; font-weight: 800; }
.blog-index { padding: clamp(70px, 9vw, 120px) clamp(22px, 6vw, 94px); }
.blog-index .article-grid { margin-top: 40px; }
.blog-index .article-grid article { background: var(--paper); }

.virtual-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(420px, .95fr); align-items: center; gap: clamp(50px, 8vw, 115px); min-height: 740px; padding: clamp(70px, 9vw, 120px) clamp(22px, 6vw, 94px); overflow: hidden; background: linear-gradient(115deg, var(--cream) 0 63%, #e7f0e9 63%); }
.virtual-copy { max-width: 720px; }
.virtual-copy h1 em { display: block; color: var(--green); font-style: normal; }
.virtual-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 32px; }
.virtual-tags span { padding: 8px 12px; color: var(--green-dark); background: white; border: 1px solid var(--line); border-radius: 999px; font-size: 12px; font-weight: 700; }
.virtual-room { position: relative; min-height: 520px; background: #142a22; border: 9px solid white; border-radius: 17px; box-shadow: 0 35px 90px rgba(16, 62, 48, .24); transform: perspective(1200px) rotateY(-3deg); }
.room-header, .room-footer { display: flex; align-items: center; gap: 10px; padding: 17px 21px; color: white; font-size: 12px; }
.room-header { border-bottom: 1px solid rgba(255,255,255,.13); }
.room-header small { margin-left: auto; color: rgba(255,255,255,.55); }
.live-dot { width: 9px; height: 9px; background: #f2775c; border-radius: 50%; box-shadow: 0 0 0 5px rgba(242,119,92,.13); }
.room-board { min-height: 390px; padding: 37px; color: white; background: radial-gradient(circle at 80% 5%, rgba(214,237,131,.12), transparent 30%), linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px); background-size: auto, 28px 28px, 28px 28px; }
.board-label { display: block; color: var(--lime); font-size: 10px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.board-equation { margin: 90px 0 25px; font-family: Georgia, serif; font-size: clamp(30px, 4vw, 48px); font-style: italic; }
.board-work { padding-left: 70px; color: var(--lime); font-family: Georgia, serif; font-size: clamp(27px, 3vw, 40px); }
.board-note { width: fit-content; margin-top: 70px; padding: 12px 15px; color: #193b2f; background: var(--lime); border-radius: 5px; font-size: 13px; transform: rotate(-1deg); }
.room-footer { justify-content: space-between; border-top: 1px solid rgba(255,255,255,.13); color: rgba(255,255,255,.6); }
.room-footer strong { color: white; }
.online-badge { position: absolute; right: -35px; bottom: 66px; padding: 15px 18px; background: white; border-radius: 8px; box-shadow: var(--shadow); transform: rotate(2deg); }
.online-badge span, .online-badge strong { display: block; }
.online-badge span { margin-bottom: 5px; color: var(--muted); font-size: 10px; text-transform: uppercase; }
.online-badge strong { color: var(--green); font-size: 13px; }
.virtual-proof { padding: 31px clamp(22px, 6vw, 94px); text-align: center; background: var(--green-dark); }
.virtual-proof p { margin-bottom: 14px; color: rgba(255,255,255,.48); font-size: 11px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.virtual-proof div { display: flex; justify-content: center; flex-wrap: wrap; gap: clamp(22px, 4vw, 55px); color: white; }
.virtual-proof a { font-family: Manrope, sans-serif; font-size: 20px; font-weight: 800; }
.virtual-proof span { color: var(--mint); font-size: 14px; font-weight: 700; }
.benefit-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.benefit-grid article { min-height: 250px; padding: 31px; background: var(--paper); }
.benefit-grid article > span { color: var(--orange); font-family: Manrope, sans-serif; font-size: 12px; font-weight: 800; }
.benefit-grid h3 { margin: 42px 0 12px; font-size: 23px; }
.benefit-grid p { margin-bottom: 0; font-size: 15px; }
.virtual-process { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(60px, 9vw, 130px); color: white; background: var(--green); }
.virtual-process > div > p:not(.eyebrow) { color: rgba(255,255,255,.66); }
.virtual-process ol { margin: 0; padding: 0; list-style: none; }
.virtual-process li { display: grid; grid-template-columns: 50px 1fr; gap: 20px; padding: 23px 0; border-bottom: 1px solid rgba(255,255,255,.17); }
.virtual-process li > span { display: grid; width: 38px; height: 38px; place-items: center; color: var(--green-dark); background: var(--lime); border-radius: 50%; font-weight: 800; }
.virtual-process strong { font-size: 18px; }
.virtual-process li p { margin: 5px 0 0; color: rgba(255,255,255,.6); font-size: 15px; }
.virtual-subjects { background: var(--paper); }
.subject-shortcuts { display: grid; gap: 13px; }
.subject-shortcuts > a { display: grid; grid-template-columns: 65px 1fr 30px; align-items: center; gap: 20px; padding: 22px 25px; background: var(--cream); border: 1px solid var(--line); border-radius: 8px; transition: transform .18s ease, border-color .18s ease; }
.subject-shortcuts > a:hover { transform: translateX(5px); border-color: var(--green); }
.subject-shortcuts > a > span { display: grid; width: 54px; height: 54px; place-items: center; color: var(--green-dark); background: var(--mint); border-radius: 50%; font-family: Georgia, serif; font-size: 22px; font-weight: 700; }
.subject-shortcuts > a:nth-child(2) > span { background: #f3d9c9; }
.subject-shortcuts > a:nth-child(3) > span { background: var(--blue); }
.subject-shortcuts strong { display: block; margin-bottom: 3px; font-family: Manrope, sans-serif; font-size: 20px; }
.subject-shortcuts p { margin: 0; font-size: 14px; }
.subject-shortcuts b { color: var(--green); font-size: 23px; }
.whatsapp-float { position: fixed; right: 20px; bottom: 20px; z-index: 30; display: grid; width: 54px; height: 54px; place-items: center; color: white; background: #25d366; border: 4px solid var(--paper); border-radius: 50%; box-shadow: 0 10px 25px rgba(18,48,35,.25); font-size: 12px; font-weight: 800; }

@media (max-width: 900px) {
  .nav a:not(.nav-cta) { display: none; }
  .hero, .section-heading, .method, .university-focus, .faq { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .study-desk { width: min(620px, 100%); margin: 20px auto 0; }
  .section-heading { gap: 10px; }
  .method, .university-focus, .faq { gap: 45px; }
  .faq-heading { position: static; }
  .contact { display: block; }
  .contact-button { margin-top: 28px; }
  .site-footer { flex-wrap: wrap; }
  .subject-grid, .article-grid { grid-template-columns: 1fr; }
  .mega-footer { display: grid; grid-template-columns: repeat(2, 1fr); }
  .footer-about { grid-column: 1 / -1; }
  .content-wrap { grid-template-columns: 1fr; }
  .content-sidebar { position: static; }
  .virtual-hero, .virtual-process { grid-template-columns: 1fr; }
  .virtual-hero { background: var(--cream); }
  .virtual-room { width: min(620px, 100%); margin: 10px auto 0; transform: none; }
  .benefit-grid { grid-template-columns: repeat(2, 1fr); }
  .province-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .site-header { padding: 13px 16px; }
  .brand-copy { font-size: 14px; }
  .nav { gap: 0; }
  .hero, .section { padding-right: 18px; padding-left: 18px; }
  h1 { font-size: 43px; }
  h2 { font-size: 37px; }
  .province-grid { grid-template-columns: 1fr; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .text-link { align-self: center; }
  .study-desk { min-height: 430px; transform: none; }
  .lesson-body { padding: 24px 18px; }
  .formula { margin: 45px 0 30px; font-size: 25px; }
  .floating-card { display: none; }
  .subject-grid { grid-template-columns: 1fr; }
  .subject-card { min-height: auto; }
  .card-icon { font-size: 72px; }
  .contact { margin-right: 18px; margin-left: 18px; }
  .site-footer { display: block; }
  .mega-footer { display: grid; grid-template-columns: 1fr; }
  .footer-about { grid-column: auto; }
  .topic-links { grid-template-columns: 1fr; }
  .virtual-hero { padding-right: 18px; padding-left: 18px; }
  .virtual-room { min-height: 440px; border-width: 6px; }
  .room-board { min-height: 320px; padding: 25px 20px; }
  .board-equation { margin-top: 62px; }
  .board-note { margin-top: 50px; }
  .online-badge { display: none; }
  .benefit-grid { grid-template-columns: 1fr; }
  .subject-shortcuts > a { grid-template-columns: 52px 1fr 20px; padding: 18px 15px; }
  .subject-shortcuts > a > span { width: 46px; height: 46px; }
  .site-footer p { margin: 18px 0; }
  .site-footer nav { flex-wrap: wrap; }
}