/* =========================================================
   COURSE PAGES  (english-grammar-course-basic/ and the rest)
   Pages are generated by _tools/build_courses.py from _content/courses
   Brand: --primary #035643, --secondary #349C5C, --light #EEFBF2,
          --color-accent #FFC000, --color-accent-soft #FFE8A1
   Each section is sized to fit inside one screen on laptops.
   ========================================================= */

.cs { --cs-ink: #1d2e29; --cs-rule: rgba(3, 86, 67, .12); }
.cs > section { overflow-x: clip; }
.cs a:focus-visible, .cs button:focus-visible, .cs summary:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 3px; }
.cs [hidden] { display: none !important; }
.cs-h2 { margin-top: 10px; font-family: var(--font-head); font-weight: 700; font-size: clamp(26px, 2.7vw, 36px); line-height: 1.18; letter-spacing: -.015em; color: var(--primary); text-wrap: balance; }
.cs-sec-head { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 12px 56px; align-items: end; margin-bottom: 24px; }
.cs-sec-sub { font-size: 15.5px; line-height: 1.7; color: var(--muted); }
.cs-mlabel { font-family: var(--font-head); font-weight: 600; font-size: 11.5px; letter-spacing: .13em; text-transform: uppercase; color: var(--secondary); }
.cs-link { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-head); font-weight: 600; font-size: 15px; color: var(--primary); }
.cs-link svg { width: 17px; height: 17px; transition: transform .3s var(--ease); }
.cs-link:hover svg { transform: translateY(3px); }
.cs-link.is-light { color: #fff; }
.cs-link.is-light:hover svg, .cs-design .cs-link:hover svg { transform: translateX(3px); }
.cs-src { font-size: 12.5px; line-height: 1.6; color: var(--muted); }
.cs-src a { color: var(--primary); font-weight: 600; text-decoration: underline; text-decoration-color: rgba(52, 156, 92, .45); text-underline-offset: 3px; }

/* image placeholders */
.cs-ph { position: relative; margin: 0; width: 100%; overflow: hidden; border-radius: 22px; background-color: var(--light);
  background-image: repeating-linear-gradient(135deg, rgba(3, 86, 67, .045) 0 12px, transparent 12px 24px); box-shadow: inset 0 0 0 1.5px rgba(52, 156, 92, .3); }
.cs-ph::before { content: ""; position: absolute; inset: 10px; border: 1.5px dashed rgba(52, 156, 92, .35); border-radius: 14px; pointer-events: none; }
.cs-ph.has-img { background: var(--light); box-shadow: none; }
.cs-ph.has-img::before { display: none; }
.cs-ph img { width: 100%; height: 100%; object-fit: cover; }
.cs-ph-in { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; padding: 24px; text-align: center; }
.cs-ph-in svg { width: 36px; height: 36px; color: var(--secondary); opacity: .8; }
.cs-ph-tag { font-family: var(--font-head); font-weight: 600; font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--secondary); }
.cs-ph-desc { max-width: 340px; font-size: 13px; line-height: 1.5; color: var(--muted); }
.cs-ph-ratio { position: absolute; right: 18px; bottom: 16px; padding: 2px 8px; border-radius: 6px; background: #fff; font-size: 11px; font-weight: 600; color: var(--secondary); box-shadow: 0 0 0 1px rgba(52, 156, 92, .2); }

/* ---------------- 1. hero ---------------- */
.cs-hero { position: relative; display: flex; align-items: center; min-height: calc(100vh - var(--header-h)); min-height: calc(100svh - var(--header-h)); padding: 40px 0 56px;
  background: radial-gradient(55% 75% at 100% 0%, #fff 0%, rgba(255, 255, 255, 0) 70%), linear-gradient(180deg, var(--light) 0%, #f7fcf9 100%); }
.cs-hero > .container { width: 100%; }
.cs-hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 56px; align-items: center; }
.cs-kicker { display: flex; align-items: center; gap: 12px; margin-top: 22px; }
.cs-pill { display: inline-flex; align-items: center; height: 28px; padding: 0 13px; border-radius: 999px; background: var(--grad-green); color: #fff; font-family: var(--font-head); font-weight: 600; font-size: 12.5px; letter-spacing: .04em; }
.cs-meter { display: inline-flex; gap: 4px; }
.cs-meter i { width: 18px; height: 6px; border-radius: 4px; background: rgba(52, 156, 92, .2); }
.cs-meter i.on { background: var(--secondary); }
.cs-kicker-t { font-family: var(--font-head); font-weight: 600; font-size: 13px; color: var(--secondary); }
.cs-h1 { margin-top: 14px; font-family: var(--font-head); font-weight: 700; font-size: clamp(34px, 3.9vw, 52px); line-height: 1.08; letter-spacing: -.025em; color: var(--primary); }
.cs-h1-level { position: relative; z-index: 0; display: inline-block; color: var(--secondary); white-space: nowrap; }
.cs-h1-level::after { content: ""; position: absolute; z-index: -1; left: -3px; right: -5px; bottom: .06em; height: .28em; border-radius: 5px; background: var(--color-accent-soft); }
.cs-tagline { margin-top: 14px; font-family: var(--font-head); font-weight: 600; font-size: clamp(17px, 1.5vw, 20px); line-height: 1.4; color: var(--cs-ink); }
.cs-intro { max-width: 560px; margin-top: 12px; font-size: 15.5px; line-height: 1.75; color: var(--text); }
.cs-keys { display: grid; grid-template-columns: repeat(4, auto); justify-content: start; gap: 10px; margin: 22px 0 0; }
.cs-keys div { padding: 9px 14px; border-radius: 14px; background: #fff; box-shadow: 0 0 0 1px rgba(52, 156, 92, .18); }
.cs-keys dt { font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.cs-keys dd { margin: 2px 0 0; font-family: var(--font-head); font-weight: 600; font-size: 14.5px; color: var(--primary); white-space: nowrap; }
.cs-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 26px; margin-top: 26px; }
.cs-btn { height: 48px; padding: 0 26px; }
.cs-btn svg, .cs-btn-gold svg { width: 17px; height: 17px; }
.cs-hero-media { position: relative; padding: 0 0 40px 30px; }
.cs-ph.is-hero { border-radius: 28px; box-shadow: inset 0 0 0 1.5px rgba(52, 156, 92, .3), 18px 18px 0 var(--color-accent-soft); }
.cs-facts { position: absolute; left: 0; bottom: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px 14px; width: min(500px, 92%); padding: 16px 18px; border-radius: 20px; background: var(--grad-deep); color: #fff; box-shadow: 0 20px 40px rgba(3, 86, 67, .25); }
.cs-facts li { display: flex; align-items: center; gap: 10px; }
.cs-fact-ic { flex: none; display: grid; place-items: center; width: 32px; height: 32px; border-radius: 10px; background: rgba(255, 255, 255, .12); color: var(--color-accent-soft); }
.cs-fact-ic svg { width: 17px; height: 17px; }
.cs-facts b { display: block; font-family: var(--font-head); font-weight: 600; font-size: 13.5px; line-height: 1.25; }
.cs-facts small { display: block; font-size: 11px; line-height: 1.35; color: rgba(255, 255, 255, .72); }

/* ---------------- 2. right level ---------------- */
.cs-fit { padding: 64px 0; }
.cs-fit-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 64px; align-items: center; }
.cs-ready { display: grid; gap: 10px; margin-top: 22px; }
.cs-ready li { display: flex; align-items: flex-start; gap: 12px; padding: 13px 16px; border-radius: 16px; background: var(--light); font-size: 15.5px; line-height: 1.5; color: var(--cs-ink); }
.cs-ready svg { flex: none; width: 22px; height: 22px; padding: 4px; border-radius: 7px; background: var(--grad-green); color: #fff; }
.cs-note { margin-top: 16px; font-size: 14px; line-height: 1.65; color: var(--muted); }
.cs-ladder { padding: 26px; border-radius: 26px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule), 0 22px 50px rgba(3, 86, 67, .1); }
.cs-ladder-title { font-family: var(--font-head); font-weight: 600; font-size: 12px; letter-spacing: .13em; text-transform: uppercase; color: var(--secondary); }
.cs-ladder ol { position: relative; display: grid; gap: 10px; margin-top: 16px; }
.cs-ladder ol::before { content: ""; position: absolute; left: 31px; top: 30px; bottom: 30px; width: 2px; background: repeating-linear-gradient(180deg, rgba(52, 156, 92, .45) 0 5px, transparent 5px 10px); }
.cs-rung-in { position: relative; display: grid; grid-template-columns: 38px minmax(0, 1fr) auto; gap: 14px; align-items: center; padding: 12px 14px; border-radius: 16px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule); transition: box-shadow .3s, transform .35s var(--ease); }
a.cs-rung-in:hover { transform: translateX(4px); box-shadow: 0 0 0 1.5px rgba(52, 156, 92, .45); }
.cs-rung-n { position: relative; z-index: 1; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: #fff; box-shadow: inset 0 0 0 2px var(--secondary); font-family: var(--font-head); font-weight: 700; font-size: 14px; color: var(--secondary); }
.cs-rung-b b { display: block; font-family: var(--font-head); font-weight: 600; font-size: 16px; color: var(--primary); }
.cs-rung-b small { display: block; margin-top: 2px; font-size: 12.5px; color: var(--muted); }
.cs-rung-in > svg { width: 18px; height: 18px; color: var(--secondary); }
.cs-rung.is-current .cs-rung-in { background: var(--grad-deep); box-shadow: 0 14px 30px rgba(3, 86, 67, .22); }
.cs-rung.is-current .cs-rung-n { background: var(--color-accent); color: var(--primary); box-shadow: none; }
.cs-rung.is-current .cs-rung-b b { color: #fff; }
.cs-rung.is-current .cs-rung-b small { color: rgba(255, 255, 255, .75); }
.cs-rung-tag { padding: 4px 10px; border-radius: 999px; background: var(--color-accent-soft); font-family: var(--font-head); font-weight: 600; font-size: 11.5px; color: var(--primary); white-space: nowrap; }
.cs-ladder-note { margin-top: 16px; font-size: 13.5px; line-height: 1.6; color: var(--muted); }

/* ---------------- 3. course map ---------------- */
.cs-map { padding: 52px 0; background: linear-gradient(180deg, var(--light) 0%, #f3fbf6 100%); }
.cs-explorer { display: grid; grid-template-columns: 290px minmax(0, 1fr); gap: 24px; align-items: start; }
.cs-mtabs { display: grid; gap: 7px; }
.cs-mtab { display: flex; align-items: center; gap: 14px; width: 100%; padding: 11px 14px; border: 0; border-radius: 16px; background: #fff; text-align: left; cursor: pointer;
  box-shadow: 0 0 0 1px var(--cs-rule); transition: background-color .3s, box-shadow .3s, transform .3s var(--ease); }
.cs-mtab:hover { transform: translateX(4px); box-shadow: 0 0 0 1.5px rgba(52, 156, 92, .45); }
.cs-mtab-n { flex: none; display: grid; place-items: center; width: 34px; height: 34px; border-radius: 11px; background: var(--light); font-family: var(--font-head); font-weight: 700; font-size: 13px; color: var(--secondary); transition: background-color .3s, color .3s; }
.cs-mtab-t { font-family: var(--font-head); font-weight: 600; font-size: 15px; line-height: 1.3; color: var(--primary); }
.cs-mtab-b { display: grid; gap: 1px; }
.cs-mtab-b small { font-size: 11.5px; color: var(--muted); }
.cs-mtab.is-on .cs-mtab-b small { color: rgba(255, 255, 255, .72); }
.cs-mnum span { margin-left: 8px; padding: 2px 8px; border-radius: 999px; background: var(--light); letter-spacing: .04em; text-transform: none; }
.cs-mclasses { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; margin-top: 16px; counter-reset: c; }
.cs-mclasses li { position: relative; padding: 8px 10px 9px; border-radius: 12px; background: var(--light); font-family: var(--font-head); font-weight: 500; font-size: 12.5px; line-height: 1.35; color: var(--primary); }
.cs-mclasses li:last-child { background: #fff7d9; }
.cs-mclasses b { display: block; font-weight: 700; font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--secondary); }
.cs-mclasses li:not(:last-child)::after { content: ""; position: absolute; right: -5px; top: 50%; z-index: 1; width: 6px; height: 6px; border-top: 2px solid var(--secondary); border-right: 2px solid var(--secondary); transform: translateY(-50%) rotate(45deg); }
.cs-mtab.is-on { background: var(--grad-deep); box-shadow: 0 14px 28px rgba(3, 86, 67, .22); transform: none; }
.cs-mtab.is-on .cs-mtab-n { background: var(--color-accent); color: var(--primary); }
.cs-mtab.is-on .cs-mtab-t { color: #fff; }
.cs-mpanels { min-width: 0; }
.cs-mpanel { padding: 22px 26px 24px; border-radius: 26px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule), 0 22px 50px rgba(3, 86, 67, .08); animation: csIn .45s var(--ease) both; }
@keyframes csIn { from { opacity: 0; transform: translateY(10px); } }
.cs-mnum { font-family: var(--font-head); font-weight: 600; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--secondary); }
.cs-mtitle { margin-top: 4px; font-family: var(--font-head); font-weight: 700; font-size: 22px; line-height: 1.2; color: var(--primary); }
.cs-mgoal { margin-top: 6px; font-size: 15.5px; color: var(--text); }
.cs-mcols { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 24px; margin-top: 16px; padding-top: 16px; border-top: 1px dashed rgba(3, 86, 67, .18); }
.cs-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 18px; }
.cs-chips li { padding: 6px 12px; border-radius: 10px; background: var(--light); font-family: var(--font-head); font-weight: 500; font-size: 13px; line-height: 1.35; color: var(--primary); }
.cs-mwords { margin-top: 8px; font-size: 14.5px; line-height: 1.6; color: var(--text); }
.cs-tasks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 10px; }
.cs-task { display: flex; align-items: flex-start; gap: 10px; padding: 10px 11px; border-radius: 14px; background: #fbfdfc; box-shadow: 0 0 0 1px var(--cs-rule); }
.cs-task-ic { flex: none; display: grid; place-items: center; width: 32px; height: 32px; border-radius: 10px; color: #fff; }
.cs-task-ic svg { width: 17px; height: 17px; }
.cs-task.is-listening .cs-task-ic { background: #349C5C; }
.cs-task.is-speaking .cs-task-ic { background: #035643; }
.cs-task.is-reading .cs-task-ic { background: #D99A06; }
.cs-task.is-writing .cs-task-ic { background: #1f7f8c; }
.cs-task b { display: block; font-family: var(--font-head); font-weight: 600; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--secondary); }
.cs-task span:last-child { font-size: 13.5px; line-height: 1.45; color: var(--cs-ink); }
.cs-project { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; margin-top: 16px; padding: 11px 16px; border-radius: 14px; background: #fff7d9; box-shadow: inset 0 0 0 1px rgba(255, 192, 0, .45); font-family: var(--font-head); font-weight: 600; font-size: 15px; color: var(--primary); }
.cs-project span { display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: #8a6700; }
.cs-project svg { width: 16px; height: 16px; }

/* ---------------- 4. outcomes ---------------- */
.cs-out { padding: 64px 0; color: #fff; background: var(--grad-section); }
.cs-sec-head.is-light .eyebrow { color: var(--color-accent-soft); }
.cs-sec-head.is-light .cs-h2 { color: #fff; }
.cs-sec-head.is-light .cs-sec-sub { color: rgba(255, 255, 255, .78); }
.cs-skills { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.cs-skill { padding: 22px 22px 24px; border-radius: 22px; background: #fff; color: var(--text); box-shadow: 0 22px 44px rgba(0, 0, 0, .16); }
.cs-skill-ic { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 14px; background: var(--color-accent-soft); color: var(--primary); }
.cs-skill-ic svg { width: 22px; height: 22px; }
.cs-skill h3 { margin-top: 14px; font-family: var(--font-head); font-weight: 700; font-size: 18px; color: var(--primary); }
.cs-skill ul { display: grid; gap: 10px; margin-top: 12px; }
.cs-skill li { position: relative; padding-left: 20px; font-size: 14.5px; line-height: 1.55; }
.cs-skill li::before { content: ""; position: absolute; left: 2px; top: .55em; width: 8px; height: 8px; border-radius: 50%; background: var(--secondary); box-shadow: 0 0 0 3px rgba(52, 156, 92, .15); }

/* ---------------- 5. inside a class ---------------- */
.cs-class { padding: 64px 0; }
.cs-class-grid { display: grid; grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr); gap: 56px; align-items: center; }
.cs-class-media { position: relative; }
.cs-ph.is-tall { max-height: 520px; border-radius: 26px; }
.cs-between { position: relative; z-index: 1; margin: -60px 18px 0; padding: 16px 18px; border-radius: 18px; background: #fff; box-shadow: 0 18px 40px rgba(3, 86, 67, .14), 0 0 0 1px var(--cs-rule); }
.cs-between p:last-child { margin-top: 6px; font-size: 14px; line-height: 1.6; color: var(--cs-ink); }
.cs-bar { display: flex; gap: 4px; height: 34px; margin-top: 22px; }
.cs-seg { display: grid; place-items: center; border-radius: 9px; color: #fff; font-family: var(--font-head); font-size: 12.5px; transform-origin: left; }
.cs-seg b { font-weight: 700; }
.cs-seg.s1 { background: #8fd0a6; color: var(--primary); }
.cs-seg.s2 { background: #5cb57e; }
.cs-seg.s3 { background: #349C5C; }
.cs-seg.s4 { background: #1f7a50; }
.cs-seg.s5 { background: #035643; }
.cs-seg.s6 { background: var(--color-accent); color: var(--primary); }
.js .cs-bar:not(.is-in) .cs-seg { transform: scaleX(0); }
.cs-bar .cs-seg { transition: transform .6s var(--ease); }
.cs-bar .cs-seg:nth-child(2) { transition-delay: .1s; } .cs-bar .cs-seg:nth-child(3) { transition-delay: .2s; } .cs-bar .cs-seg:nth-child(4) { transition-delay: .3s; } .cs-bar .cs-seg:nth-child(5) { transition-delay: .4s; } .cs-bar .cs-seg:nth-child(6) { transition-delay: .5s; }
.cs-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 18px; margin-top: 20px; }
.cs-step { position: relative; display: grid; gap: 3px; padding: 12px 14px 12px 18px; border-radius: 14px; background: #fbfdfc; box-shadow: 0 0 0 1px var(--cs-rule); }
.cs-step::before { content: ""; position: absolute; left: 0; top: 12px; bottom: 12px; width: 4px; border-radius: 0 4px 4px 0; }
.cs-step.s1::before { background: #8fd0a6; } .cs-step.s2::before { background: #5cb57e; } .cs-step.s3::before { background: #349C5C; } .cs-step.s4::before { background: #1f7a50; } .cs-step.s5::before { background: #035643; } .cs-step.s6::before { background: var(--color-accent); }
.cs-step-min { font-family: var(--font-head); font-weight: 700; font-size: 12px; color: var(--secondary); }
.cs-step b { font-family: var(--font-head); font-weight: 600; font-size: 15px; color: var(--primary); }
.cs-step span:last-child { font-size: 13.5px; line-height: 1.55; color: var(--text); }

/* ---------------- 6. progress + receive ---------------- */
.cs-progress { padding: 64px 0; background: linear-gradient(180deg, #fff 0%, var(--light) 100%); }
.cs-progress-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.cs-psteps { position: relative; display: grid; gap: 14px; margin-top: 24px; }
.cs-psteps::before { content: ""; position: absolute; left: 17px; top: 20px; bottom: 20px; width: 2px; background: linear-gradient(180deg, var(--secondary), var(--primary)); border-radius: 2px; }
.cs-psteps li { position: relative; display: grid; grid-template-columns: 36px minmax(0, 1fr); gap: 14px; align-items: start; }
.cs-pn { position: relative; z-index: 1; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: var(--grad-green); color: #fff; font-family: var(--font-head); font-weight: 700; font-size: 14px; box-shadow: 0 0 0 5px #f5fcf8; }
.cs-psteps li:last-child .cs-pn { background: var(--color-accent); color: var(--primary); }
.cs-psteps b { display: block; font-family: var(--font-head); font-weight: 600; font-size: 16px; color: var(--primary); }
.cs-psteps li > span:last-child { font-size: 14.5px; line-height: 1.6; color: var(--text); padding-top: 6px; }
.cs-ph.is-wide { border-radius: 22px; margin-bottom: 18px; max-height: 250px; }
.cs-recv { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 10px; }
.cs-recv li { display: grid; grid-template-columns: 38px minmax(0, 1fr); gap: 2px 12px; padding: 14px; border-radius: 16px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule), 0 10px 22px rgba(3, 86, 67, .05); }
.cs-recv-ic { grid-row: span 2; display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; background: var(--light); color: var(--secondary); }
.cs-recv-ic svg { width: 19px; height: 19px; }
.cs-recv b { font-family: var(--font-head); font-weight: 600; font-size: 14.5px; color: var(--primary); }
.cs-recv li > span:last-child { font-size: 13px; line-height: 1.5; color: var(--muted); }

/* ---------------- 7. design ---------------- */
.cs-design { padding: 56px 0; }
.cs-design-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: 56px; align-items: center; }
.cs-standards { margin-top: 18px; font-size: 15.5px; line-height: 1.75; color: var(--text); }
.cs-design .cs-src { margin-top: 12px; }
.cs-design .cs-link { margin-top: 20px; }
.cs-sci { display: grid; gap: 12px; }
.cs-sci li { display: grid; gap: 5px; padding: 15px 20px 15px 24px; border-radius: 18px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule), inset 4px 0 0 var(--secondary); }
.cs-sci b { font-family: var(--font-head); font-weight: 600; font-size: 16.5px; color: var(--primary); }
.cs-sci li > span:nth-child(2) { font-size: 14.5px; line-height: 1.65; color: var(--text); }

/* ---------------- 8. faq ---------------- */
.cs-faq { padding: 64px 0; background: var(--light); }
.cs-faq-grid { display: grid; grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); gap: 56px; align-items: start; }
.cs-faq .cs-sec-sub { margin-top: 12px; }
.cs-wa { display: inline-flex; align-items: center; gap: 10px; margin-top: 20px; height: 46px; padding: 0 20px; border-radius: 999px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule); font-family: var(--font-head); font-weight: 600; font-size: 14.5px; color: var(--primary); transition: box-shadow .3s, transform .3s var(--ease); }
.cs-wa:hover { transform: translateY(-2px); box-shadow: 0 0 0 1.5px var(--secondary); }
.cs-wa svg { width: 22px; height: 22px; color: #25D366; }
.cs-qs { display: grid; gap: 10px; }
.cs-q { border-radius: 16px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule); }
.cs-q summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 20px; list-style: none; cursor: pointer; font-family: var(--font-head); font-weight: 600; font-size: 15.5px; line-height: 1.4; color: var(--primary); }
.cs-q summary::-webkit-details-marker { display: none; }
.cs-q summary i { position: relative; flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--light); transition: background-color .3s, transform .35s var(--ease); }
.cs-q summary i::before, .cs-q summary i::after { content: ""; position: absolute; left: 50%; top: 50%; width: 11px; height: 2px; border-radius: 2px; background: var(--primary); transform: translate(-50%, -50%); }
.cs-q summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .3s var(--ease); }
.cs-q[open] summary i { background: var(--grad-green); transform: rotate(180deg); }
.cs-q[open] summary i::before { background: #fff; }
.cs-q[open] summary i::after { transform: translate(-50%, -50%) rotate(0); background: #fff; }
.cs-q p { padding: 0 20px 18px; font-size: 14.5px; line-height: 1.7; color: var(--text); animation: csIn .35s var(--ease) both; }

/* ---------------- 9. cta ---------------- */
.cs-cta { padding: 70px 0; color: #fff; background: var(--grad-section); }
.cs-cta-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 56px; align-items: center; }
.cs-cta .cs-h2 { color: #fff; }
.cs-cta p { margin-top: 12px; font-size: 16px; line-height: 1.7; color: rgba(255, 255, 255, .82); }
.cs-btn-gold { height: 48px; padding: 0 26px; background: var(--color-accent); color: var(--primary); }
.cs-btn-gold:hover { background: #ffcb2e; transform: translateY(-2px); }
.cs-next { padding: 22px 24px; border-radius: 22px; background: rgba(255, 255, 255, .07); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .14); }
.cs-next .cs-mlabel { color: var(--color-accent-soft); }
.cs-next p:not(.cs-mlabel) { margin-top: 8px; font-size: 14.5px; }
.cs-next ul { display: grid; gap: 10px; margin-top: 14px; }
.cs-next a { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 12px; align-items: center; padding: 12px 16px; border-radius: 14px; background: #fff; color: var(--primary); transition: transform .3s var(--ease); }
.cs-next a:hover { transform: translateX(4px); }
.cs-next a span { font-family: var(--font-head); font-weight: 600; font-size: 15px; }
.cs-next a small { grid-row: 2; font-size: 12.5px; color: var(--muted); }
.cs-next a svg { grid-row: span 2; grid-column: 2; width: 18px; height: 18px; color: var(--secondary); }

/* ---------------- responsive ---------------- */
@media (max-width: 1100px) {
  .cs-keys { grid-template-columns: repeat(2, auto); }
  .cs-skills { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 999px) {
  .cs-hero { min-height: 0; padding: 32px 0 56px; }
  .cs-hero-grid, .cs-fit-grid, .cs-class-grid, .cs-progress-grid, .cs-design-grid, .cs-faq-grid, .cs-cta-grid, .cs-sec-head { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .cs-sec-head { gap: 10px; }
  .cs-hero-media { max-width: 620px; }
  .cs-explorer { grid-template-columns: minmax(0, 1fr); }
  .cs-mtabs { display: flex; overflow-x: auto; gap: 8px; margin: 0 -24px; padding: 2px 24px 6px; scrollbar-width: none; }
  .cs-mtabs::-webkit-scrollbar { display: none; }
  .cs-mtab { flex: none; width: auto; padding: 10px 14px; }
  .cs-mtab:hover { transform: none; }
  .cs-class-media { max-width: 520px; }
  .cs-ph.is-tall { aspect-ratio: 4 / 3 !important; }
}
@media (max-width: 680px) {
  .cs-fit, .cs-map, .cs-out, .cs-class, .cs-progress, .cs-design, .cs-faq { padding: 56px 0; }
  .cs-cta { padding: 52px 0; }
  .cs-keys { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cs-keys dd { white-space: normal; }
  .cs-hero-media { padding: 0 0 0 0; }
  .cs-ph.is-hero { box-shadow: inset 0 0 0 1.5px rgba(52, 156, 92, .3), 10px 10px 0 var(--color-accent-soft); }
  .cs-facts { position: relative; width: auto; margin: -24px 12px 0; grid-template-columns: minmax(0, 1fr); }
  .cs-mtabs { margin: 0 -18px; padding: 2px 18px 6px; }
  .cs-mpanel { padding: 22px 18px; border-radius: 20px; }
  .cs-mcols { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .cs-tasks { grid-template-columns: minmax(0, 1fr); }
  .cs-mclasses { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cs-mclasses li::after { display: none; }
  .cs-mtitle { font-size: 21px; }
  .cs-skills { grid-template-columns: minmax(0, 1fr); }
  .cs-steps { grid-template-columns: minmax(0, 1fr); }
  .cs-bar { height: 28px; }
  .cs-recv { grid-template-columns: minmax(0, 1fr); }
  .cs-between { margin: -40px 10px 0; }
  .cs-rung-in { grid-template-columns: 34px minmax(0, 1fr); }
  .cs-rung-tag, .cs-rung-in > svg { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .cs *, .cs *::before, .cs *::after { animation: none !important; transition: none !important; }
  .js .cs-bar:not(.is-in) .cs-seg { transform: none; }
}

/* shorter laptop screens: tighten the tallest sections so each still fits in one screen */
@media (min-width: 1000px) and (max-height: 820px) {
  .cs-map { padding: 36px 0 40px; }
  .cs-map .cs-sec-head { margin-bottom: 16px; }
  .cs-map .cs-h2 { font-size: 28px; }
  .cs-map .cs-sec-sub { font-size: 14px; line-height: 1.6; }
  .cs-mtab { padding: 8px 12px; }
  .cs-mtab-n { width: 30px; height: 30px; }
  .cs-mpanel { padding: 18px 22px 20px; }
  .cs-mgoal { font-size: 14.5px; }
  .cs-mcols { margin-top: 12px; padding-top: 12px; }
  .cs-chips { margin: 8px 0 12px; }
  .cs-chips li { padding: 5px 10px; font-size: 12.5px; }
  .cs-task { padding: 8px 10px; }
  .cs-task-ic { width: 28px; height: 28px; }
  .cs-project { margin-top: 10px; padding: 8px 14px; }
  .cs-mclasses { margin-top: 10px; }
  .cs-mclasses li { padding: 6px 9px 7px; }
  .cs-mtab-b small { display: none; }
  .cs-class { padding: 44px 0; }
  .cs-class .cs-h2 { font-size: 28px; }
  .cs-steps { gap: 10px 16px; margin-top: 16px; }
  .cs-step { padding: 9px 12px 9px 16px; }
  .cs-ph.is-tall { max-height: 440px; }
}
@media (min-width: 1000px) and (max-height: 740px) {
  .cs-map { padding: 24px 0 28px; }
  .cs-map .cs-h2 { font-size: 26px; }
  .cs-mtabs { gap: 5px; }
  .cs-mpanel { padding: 16px 20px 18px; }
  .cs-mtitle { font-size: 20px; }
}

/* =========================================================
   ENGLISH GRAMMAR COURSE (Grammar Masterplan, Oct 2026)
   ========================================================= */
.cs-facts.is-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); width: min(440px, 92%); }

/* course map: 12-week phase bar + unit explorer */
.gm-phase { display: grid; grid-template-columns: 2fr 1fr; gap: 10px; margin: -6px 0 22px; }
.gm-phase p { margin-bottom: 6px; font-size: 12.5px; color: var(--muted); }
.gm-phase b { margin-right: 6px; font-family: var(--font-head); font-weight: 600; color: var(--primary); }
.gm-segs { display: flex; gap: 4px; height: 30px; }
.gm-seg { display: grid; place-items: center; border-radius: 9px; color: #fff; font-family: var(--font-head); font-size: 11.5px; }
.gm-seg.u1 { background: #8fd0a6; color: var(--primary); } .gm-seg.u2 { background: #5cb57e; } .gm-seg.u3 { background: #349C5C; }
.gm-seg.u4 { background: #1f7a50; } .gm-seg.u5 { background: #0d6648; } .gm-seg.u6 { background: #035643; }
.gm-seg.is-prac { flex: 1; background: var(--color-accent); color: var(--primary); font-weight: 600; }
.gm-cols { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: 22px; margin-top: 16px; padding-top: 16px; border-top: 1px dashed rgba(3, 86, 67, .18); }
.gm-classes { display: grid; gap: 6px; }
.gm-classes li { display: grid; grid-template-columns: 70px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 7px 12px; border-radius: 12px; background: var(--light); }
.gm-cn { font-family: var(--font-head); font-weight: 700; font-size: 11.5px; letter-spacing: .04em; text-transform: uppercase; color: var(--secondary); }
.gm-ct { font-family: var(--font-head); font-weight: 500; font-size: 14px; line-height: 1.35; color: var(--primary); }
.gm-classes li.is-test { background: #fff7d9; box-shadow: inset 0 0 0 1px rgba(255, 192, 0, .5); }
.gm-tag { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: 999px; background: #fff; font-size: 11px; font-weight: 600; color: #8a6700; white-space: nowrap; }
.gm-tag svg { width: 13px; height: 13px; }
.gm-later { align-self: start; padding: 16px 18px; border-radius: 16px; background: #fbfdfc; box-shadow: 0 0 0 1px var(--cs-rule); }
.gm-later .cs-mlabel { display: flex; align-items: center; gap: 6px; }
.gm-later .cs-mlabel svg { width: 15px; height: 15px; }
.gm-later-what { margin-top: 8px; font-family: var(--font-head); font-weight: 600; font-size: 15px; line-height: 1.4; color: var(--primary); }
.gm-later ul { display: grid; gap: 6px; margin-top: 10px; }
.gm-later li { position: relative; padding-left: 16px; font-size: 13.5px; line-height: 1.5; color: var(--text); }
.gm-later li::before { content: ""; position: absolute; left: 2px; top: .55em; width: 6px; height: 6px; border-radius: 50%; background: var(--color-accent); }

/* tense pathway */
.tp { padding: 64px 0; }
.tp-grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 52px; align-items: center; }
.tp-outcome { margin: 18px 0 14px; padding: 16px 18px; border-radius: 16px; background: var(--grad-deep); color: #fff; font-family: var(--font-head); font-weight: 600; font-size: 17px; line-height: 1.45; }
.tp-outcome span { display: block; margin-bottom: 4px; font-size: 11.5px; letter-spacing: .13em; text-transform: uppercase; color: var(--color-accent-soft); }
.tp-note { margin-top: 12px; font-size: 14px; line-height: 1.6; color: var(--muted); }
.tp-bridge { margin-top: 14px; padding: 14px 16px; border-radius: 14px; background: #fff7d9; box-shadow: inset 0 0 0 1px rgba(255, 192, 0, .45); }
.tp-bridge p:last-child { margin-top: 6px; font-size: 13.5px; line-height: 1.6; color: var(--cs-ink); }
.tp-map { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.tp-col { padding: 14px; border-radius: 20px; background: #fbfdfc; box-shadow: 0 0 0 1px var(--cs-rule); opacity: .78; }
.tp-col.is-here { opacity: 1; background: #fff; box-shadow: 0 0 0 2px var(--secondary), 0 18px 40px rgba(3, 86, 67, .12); }
.tp-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px; margin-bottom: 10px; font-family: var(--font-head); font-weight: 700; font-size: 15px; color: var(--primary); }
.tp-here { padding: 2px 8px; border-radius: 999px; background: var(--color-accent); font-size: 10.5px; font-weight: 600; color: var(--primary); }
.tp-col ol { display: grid; gap: 6px; }
.tp-col li { display: grid; gap: 2px; padding: 9px 11px; border-radius: 12px; font-family: var(--font-head); font-weight: 500; font-size: 13.5px; line-height: 1.3; color: var(--primary); }
.tp-col.is-basic li { background: #e3f5ea; } .tp-col.is-intermediate li { background: #cdebd9; } .tp-col.is-advanced li { background: #fff3c9; }
.tp-col li small { font-family: var(--font-body); font-size: 11px; font-weight: 600; color: #8a6700; }

/* inside a class */
.gm-lead { margin-top: 10px; font-size: 15px; line-height: 1.65; color: var(--text); }
.gm-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.gm-steps .cs-step:last-child:nth-child(odd) { grid-column: 1 / -1; }
.cs-step.s7::before, .cs-seg.s7 { background: var(--color-accent); color: var(--primary); }
.gm-class .cs-seg.s6 { background: #024334; color: #fff; }
.gm-class .cs-step.s6::before { background: #024334; }

/* practice month */
.pm { padding: 60px 0; color: #fff; background: var(--grad-section); }
.pm-weeks { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.pm-wk { margin-bottom: 8px; font-family: var(--font-head); font-weight: 600; font-size: 12px; letter-spacing: .13em; text-transform: uppercase; color: var(--color-accent-soft); }
.pm-week ol { display: grid; gap: 8px; }
.pm-s { position: relative; display: grid; gap: 3px; padding: 11px 13px 12px; border-radius: 14px; background: #fff; color: var(--text); }
.pm-s.is-fixed { background: #fff7d9; box-shadow: inset 0 0 0 1.5px var(--color-accent); }
.pm-n { position: absolute; right: 10px; top: 10px; font-family: var(--font-head); font-weight: 700; font-size: 11px; color: var(--secondary); }
.pm-s b { padding-right: 26px; font-family: var(--font-head); font-weight: 600; font-size: 14px; line-height: 1.3; color: var(--primary); }
.pm-t { font-size: 12.5px; line-height: 1.45; }
.pm-fixed { justify-self: start; margin-top: 3px; padding: 2px 8px; border-radius: 999px; background: var(--color-accent); font-size: 10.5px; font-weight: 600; color: var(--primary); }
.pm-foot { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 28px; align-items: start; margin-top: 22px; }
.pm-pairs .cs-mlabel { color: var(--color-accent-soft); }
.pm-pairs ul { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.pm-pairs li { padding: 5px 11px; border-radius: 999px; background: rgba(255, 255, 255, .1); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .2); font-family: var(--font-head); font-size: 12.5px; color: #fff; }
.pm-why { font-size: 13.5px; line-height: 1.6; color: rgba(255, 255, 255, .8); }
.pm-why .cs-src, .pm-why .cs-src a { color: var(--color-accent-soft); }

/* assessment */
.as-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: 48px; align-items: center; }
.as .cs-recv-wrap { margin-top: 20px; }
.as .cs-sec-sub { margin-top: 10px; }
.as-list { position: relative; display: grid; gap: 8px; }
.as-list li { display: grid; grid-template-columns: 38px minmax(0, 1fr) auto; grid-template-areas: "ic when tool" "ic title tool" "ic text text"; gap: 1px 12px; align-items: center; padding: 10px 14px; border-radius: 14px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule); }
.as-ic { grid-area: ic; align-self: start; display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; background: var(--light); color: var(--secondary); }
.as-ic svg { width: 19px; height: 19px; }
.as-when { grid-area: when; font-size: 11.5px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
.as-list b { grid-area: title; font-family: var(--font-head); font-weight: 600; font-size: 15px; color: var(--primary); }
.as-text { grid-area: text; font-size: 13.5px; line-height: 1.5; color: var(--text); }
.as-tool { grid-area: tool; align-self: start; padding: 3px 9px; border-radius: 999px; background: var(--light); font-size: 11px; font-weight: 600; color: var(--secondary); white-space: nowrap; }
.as-list li:last-child { background: var(--grad-deep); box-shadow: none; }
.as-list li:last-child b, .as-list li:last-child .as-text { color: #fff; }
.as-list li:last-child .as-when { color: var(--color-accent-soft); }
.as-list li:last-child .as-ic { background: var(--color-accent); color: var(--primary); }
.as-level { display: grid; gap: 6px; margin-top: 16px; padding: 14px 16px; border-radius: 14px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule); font-size: 14px; line-height: 1.6; color: var(--cs-ink); }

/* design */
.gd-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: start; }
.gd-std { display: grid; gap: 10px; margin-top: 18px; }
.gd-std li { position: relative; padding-left: 20px; font-size: 14.5px; line-height: 1.65; color: var(--text); }
.gd-std li::before { content: ""; position: absolute; left: 2px; top: .6em; width: 8px; height: 8px; border-radius: 50%; background: var(--secondary); }
.gd-std b { color: var(--primary); }
.gd-rule { margin: 14px 0 10px; padding: 12px 16px; border-radius: 14px; background: var(--light); font-size: 14px; line-height: 1.6; color: var(--primary); font-weight: 500; }
.cs-found { margin-top: 16px; padding: 12px 16px 14px; border-radius: 16px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule); }
.cs-found ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 18px; margin-top: 8px; }
.cs-found li { font-size: 13px; line-height: 1.45; color: var(--text); }
.cs-found b { font-family: var(--font-head); font-weight: 600; color: var(--primary); }
.cs-found small { display: block; font-size: 11.5px; color: var(--muted); }
.gd-pr { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 10px; counter-reset: pr; }
.gd-pr li { counter-increment: pr; position: relative; display: grid; align-content: start; gap: 6px; padding: 12px 12px 12px; border-radius: 14px; background: #fff; box-shadow: 0 0 0 1px var(--cs-rule); }
.gd-pr li::before { content: counter(pr); display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--grad-green); color: #fff; font-family: var(--font-head); font-weight: 700; font-size: 11px; }
.gd-pr b { font-family: var(--font-head); font-weight: 600; font-size: 13.5px; line-height: 1.3; color: var(--primary); }
.gd-pr span { font-size: 12px; line-height: 1.45; color: var(--muted); }

@media (min-width: 1000px) and (max-height: 820px) {
  .tp, .pm, .cs-progress.as, .cs-design.gd { padding: 44px 0; }
  .gm-class .cs-h2, .pm .cs-h2, .as .cs-h2, .gd .cs-h2 { font-size: 28px; }
  .gm-class .gm-lead { margin-top: 6px; font-size: 14px; line-height: 1.55; }
  .gm-class .cs-steps { gap: 8px 14px; margin-top: 12px; }
  .gm-class .cs-step { padding: 7px 12px 7px 16px; }
  .pm .cs-sec-head { margin-bottom: 16px; }
  .pm-s { padding: 9px 12px 10px; }
  .pm-week ol { gap: 6px; }
  .pm-foot { margin-top: 16px; }
  .as-list li { padding: 8px 12px; }
  .gd-pr li { padding: 10px; }
  .cs-fit { padding: 44px 0; }
  .cs-ready { margin-top: 16px; gap: 8px; }
  .cs-ready li { padding: 10px 14px; font-size: 15px; }
  .cs-found { margin-top: 12px; padding: 10px 14px 12px; }
  .cs-faq { padding: 44px 0; }
  .cs-q summary { padding: 12px 18px; font-size: 15px; }
}
@media (min-width: 1000px) and (max-height: 740px) {
  .cs-fit, .gm-class, .pm, .cs-progress.as, .cs-faq { padding: 32px 0; }
  .pm .cs-sec-head { margin-bottom: 12px; }
  .as .cs-recv-wrap { margin-top: 14px; }
  .as .cs-recv { gap: 8px; }
  .as .cs-recv li { padding: 10px 12px; }
  .as .as-level { margin-top: 10px; padding: 10px 14px; }
  .as-list { gap: 6px; }
  .as-list li { padding: 6px 12px; }
  .as-text { font-size: 13px; line-height: 1.45; }
  .cs-found ul { gap: 6px 16px; }
}

@media (max-width: 999px) {
  .tp-grid, .as-grid, .gd-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .pm-weeks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pm-foot { grid-template-columns: minmax(0, 1fr); gap: 16px; }
}
@media (max-width: 680px) {
  .gm-phase { grid-template-columns: minmax(0, 1fr); }
  .gm-cols { grid-template-columns: minmax(0, 1fr); }
  .gm-classes li { grid-template-columns: 58px minmax(0, 1fr); }
  .gm-tag { grid-column: 2; justify-self: start; }
  .tp, .pm { padding: 52px 0; }
  .tp-map { grid-template-columns: minmax(0, 1fr); }
  .pm-weeks { grid-template-columns: minmax(0, 1fr); }
  .gm-steps { grid-template-columns: minmax(0, 1fr); }
  .as-list li { grid-template-columns: 34px minmax(0, 1fr); grid-template-areas: "ic when" "ic title" "ic text" "ic tool"; }
  .as-tool { justify-self: start; margin-top: 4px; }
  .gd-pr { grid-template-columns: minmax(0, 1fr); }
  .cs-found ul { grid-template-columns: minmax(0, 1fr); }
}
.cs-q p a { color: var(--secondary); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }