/* Comma Learning — site styles
   Layout language: big rounded cards, pill buttons, organic blob shapes,
   age/outcome tags and a repeated single call-to-action band. */

:root {
  --green: #2f9a4f;
  --green-dark: #1f7a3b;
  --green-soft: #e9f6ec;
  --leaf: #93b440;
  --lime: #c7f45c;
  --navy: #0b163f;
  --blue: #355bff;
  --coral: #ff6b5f;
  --orange: #ff8a00;
  --mist: #f4f6fa;
  --cream: #fbfcf5;
  --ink: #1c2230;
  --ink-soft: #545c6e;
  --line: #e3e7ee;
  --white: #fff;
  --wa: #25d366;

  --r-lg: 40px;
  --r-md: 24px;
  --r-sm: 14px;
  --shadow: 0 6px 24px rgba(11, 22, 63, .08);
  --shadow-lift: 0 14px 36px rgba(11, 22, 63, .14);

  --font-en: "Space Grotesk", "Noto Sans TC", system-ui, sans-serif;
  --font-zh: "Noto Sans TC", "PingFang HK", "Microsoft JhengHei", system-ui, sans-serif;
  --wrap: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  font-family: var(--font-zh);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
html[lang="en"] body { font-family: var(--font-en); }
img, video { max-width: 100%; display: block; }
[hidden] { display: none !important; }
a { color: var(--green-dark); }
h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .5em; font-weight: 800; letter-spacing: .01em; }
p { margin: 0 0 1em; }
.num, .en-display { font-family: var(--font-en); }

/* ---------- bilingual switching ---------- */
html:not([lang="en"]) [data-l="en"],
html[lang="en"] [data-l="zh"] { display: none !important; }

/* ---------- utilities ---------- */
.wrap { width: min(100% - 32px, var(--wrap)); margin-inline: auto; }
.section { padding: 96px 0; position: relative; }
.section--mist { background: var(--mist); }
.section--cream { background: var(--cream); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--navy); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 200; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 6px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-en); font-weight: 700; font-size: 14px;
  letter-spacing: .12em; text-transform: uppercase; color: var(--green);
  margin-bottom: 12px;
}
.eyebrow::before { content: ""; width: 10px; height: 14px; border-radius: 50% 50% 50% 0; background: var(--lime); transform: rotate(-20deg); }
.sec-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.sec-head h2 { font-size: clamp(28px, 4vw, 42px); }
.sec-head p { color: var(--ink-soft); font-size: 17px; }
.hl { background: linear-gradient(transparent 62%, var(--lime) 62%); padding: 0 .1em; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 12px;
  min-height: 56px; padding: 12px 18px 12px 28px;
  border-radius: 999px; border: 2px solid transparent;
  font-weight: 700; font-size: 16px; text-decoration: none; cursor: pointer;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn .arr {
  width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center; flex: none;
  background: rgba(255,255,255,.25); font-size: 15px;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lift); }
.btn--primary { background: var(--green); color: #fff; }
.btn--primary:hover { background: var(--green-dark); }
.btn--wa { background: var(--wa); color: #0b3d1e; }
.btn--wa .arr { background: rgba(255,255,255,.55); }
.btn--ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn--ghost .arr { background: var(--green-soft); color: var(--green-dark); }
.btn--navy { background: var(--navy); color: #fff; }
.btn--lime { background: var(--lime); color: var(--navy); }
.btn--lime .arr { background: rgba(11,22,63,.1); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }
.wa-ico { width: 22px; height: 22px; flex: none; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.94); backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent; transition: border-color .2s;
}
.site-header.scrolled { border-color: var(--line); }
.nav { display: flex; align-items: center; gap: 24px; height: 76px; }
.nav__logo img { height: 46px; width: auto; }
.nav__links { display: flex; gap: 4px; margin: 0 auto 0 12px; list-style: none; padding: 0; }
.nav__links a {
  display: block; padding: 8px 14px; border-radius: 999px;
  color: var(--ink); text-decoration: none; font-weight: 700; font-size: 15px;
}
.nav__links a:hover, .nav__links a[aria-current="page"] { background: var(--green-soft); color: var(--green-dark); }
.nav__tools { display: flex; align-items: center; gap: 10px; }
.lang-toggle {
  display: inline-flex; border: 2px solid var(--line); border-radius: 999px; padding: 3px;
  background: #fff;
}
.lang-toggle button {
  border: 0; background: none; font: inherit; font-weight: 700; font-size: 13px;
  padding: 5px 11px; border-radius: 999px; cursor: pointer; color: var(--ink-soft);
}
.lang-toggle button[aria-pressed="true"] { background: var(--navy); color: #fff; }
.nav .btn { min-height: 44px; padding: 8px 18px; font-size: 15px; }
.menu-btn {
  display: none; width: 46px; height: 46px; border-radius: 50%;
  border: 2px solid var(--line); background: #fff; cursor: pointer; place-items: center;
}
.menu-btn span, .menu-btn span::before, .menu-btn span::after {
  display: block; width: 18px; height: 2px; background: var(--ink); position: relative; border-radius: 2px; transition: .2s;
}
.menu-btn span::before, .menu-btn span::after { content: ""; position: absolute; left: 0; }
.menu-btn span::before { top: -6px; } .menu-btn span::after { top: 6px; }
.menu-open .menu-btn span { background: transparent; }
.menu-open .menu-btn span::before { top: 0; transform: rotate(45deg); }
.menu-open .menu-btn span::after { top: 0; transform: rotate(-45deg); }
.mobile-menu { display: none; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 28px 0 72px; }
.hero__grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.hero__copy h1 { font-size: clamp(32px, 4.2vw, 50px); line-height: 1.22; margin-bottom: 18px; }
.hero__copy h1 .en-sub { display: block; font-family: var(--font-en); font-size: .42em; color: var(--green); margin-top: 14px; letter-spacing: 0; }
.hero__lead { font-size: 18px; color: var(--ink-soft); max-width: 36em; }
.hero__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 999px; font-size: 14px; font-weight: 700;
  background: var(--green-soft); color: var(--green-dark);
}
.tag--lime { background: var(--lime); color: var(--navy); }
.tag--navy { background: var(--navy); color: #fff; }
.tag--coral { background: #ffe6e3; color: #b3362c; }
.tag--orange { background: #fff0dc; color: #a45500; }
.tag--blue { background: #e7ecff; color: #2440c4; }
.hero__school { margin-top: 18px; font-weight: 700; }
.hero__school a { text-decoration: none; border-bottom: 2px solid var(--lime); color: var(--navy); }

.hero__visual { position: relative; aspect-ratio: 1 / 1.02; }
.blob-photo {
  position: absolute; inset: 0;
  border-radius: 58% 42% 46% 54% / 48% 56% 44% 52%;
  overflow: hidden; box-shadow: var(--shadow-lift);
  animation: morph 14s ease-in-out infinite;
}
.blob-photo img { width: 100%; height: 100%; object-fit: cover; }
@keyframes morph {
  0%,100% { border-radius: 58% 42% 46% 54% / 48% 56% 44% 52%; }
  50%     { border-radius: 44% 56% 58% 42% / 56% 44% 56% 44%; }
}
.hero__badge {
  position: absolute; z-index: 2; background: #fff; border-radius: 999px;
  box-shadow: var(--shadow); padding: 10px 18px; font-weight: 800; font-size: 14px;
  display: flex; align-items: center; gap: 10px;
}
.hero__badge b { font-family: var(--font-en); font-size: 26px; color: var(--green); line-height: 1; }
.hero__badge--a { left: -18px; bottom: 16%; }
.hero__badge--b { right: -8px; top: 8%; }
.deco { position: absolute; pointer-events: none; z-index: 0; }
.deco--comma { width: 160px; right: 4%; top: 40px; opacity: .9; }
.deco--dots {
  width: 180px; height: 180px; left: -40px; bottom: 30px;
  background-image: radial-gradient(var(--lime) 3px, transparent 3.5px);
  background-size: 22px 22px;
}
.hero > .wrap { position: relative; z-index: 1; }

/* ---------- age / filter pills ---------- */
.pill-bar { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 40px; }
.pill-bar button {
  font: inherit; font-weight: 700; font-size: 15px; cursor: pointer;
  padding: 10px 20px; border-radius: 999px; border: 2px solid var(--line); background: #fff; color: var(--ink);
  box-shadow: 0 2px 4px rgba(0,0,0,.05); transition: .2s;
}
.pill-bar button:hover { border-color: var(--green); }
.pill-bar button[aria-pressed="true"] { background: var(--green); border-color: var(--green); color: #fff; }

/* ---------- course cards ---------- */
.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.course-card {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border-radius: var(--r-lg); overflow: hidden;
  box-shadow: var(--shadow); transition: transform .25s, box-shadow .25s;
  --accent: var(--green);
}
.course-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lift); }
.course-card[hidden] { display: none; }
.course-card__img { aspect-ratio: 4 / 3; background: var(--mist); overflow: hidden; }
.course-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.course-card:hover .course-card__img img { transform: scale(1.04); }
.course-card__no {
  position: absolute; top: 16px; left: 16px;
  font-family: var(--font-en); font-weight: 800; font-size: 15px;
  background: var(--accent); color: #fff; border-radius: 999px; padding: 4px 14px;
}
.course-card__body { padding: 24px 26px 28px; display: flex; flex-direction: column; flex: 1; }
.course-card__body h3 { font-size: 21px; margin-bottom: 4px; }
.course-card__en { font-family: var(--font-en); color: var(--ink-soft); font-size: 14px; font-weight: 600; margin-bottom: 12px; }
.course-card__meta { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.course-card__meta .tag { font-size: 13px; padding: 4px 12px; }
.course-card__body p { color: var(--ink-soft); font-size: 15px; }
.course-card__link {
  margin-top: auto; display: inline-flex; align-items: center; gap: 10px;
  font-weight: 800; text-decoration: none; color: var(--accent);
}
.course-card__link::after { content: "→"; transition: transform .2s; }
.course-card:hover .course-card__link::after { transform: translateX(4px); }
.course-card__link::before { content: ""; position: absolute; inset: 0; } /* whole card clickable */
.c-game { --accent: var(--green); }
.c-book { --accent: var(--coral); }
.c-char { --accent: #c2477a; }
.c-tool { --accent: var(--blue); }
.c-agent { --accent: var(--navy); }
.c-comfy { --accent: var(--orange); }

/* ---------- learning flow ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.flow__step {
  position: relative; background: #fff; border-radius: var(--r-md); padding: 30px 24px 26px;
  box-shadow: var(--shadow);
}
.flow__step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-family: var(--font-en); font-weight: 800; font-size: 44px; line-height: 1;
  color: var(--lime); -webkit-text-stroke: 1.5px var(--green); display: block; margin-bottom: 12px;
}
.flow__step:not(:last-child)::after {
  content: ""; position: absolute; right: -16px; top: 50%; width: 12px; height: 12px;
  border-top: 3px solid var(--green); border-right: 3px solid var(--green); transform: translateY(-50%) rotate(45deg);
}
.flow__step h3 { font-size: 20px; }
.flow__step p { color: var(--ink-soft); font-size: 15px; margin: 0; }
.flow__loop {
  margin-top: 36px; background: var(--navy); color: #fff; border-radius: var(--r-lg);
  padding: 32px 36px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 28px; align-items: center;
}
.flow__loop h3 { color: var(--lime); font-size: 22px; }
.flow__loop p { color: #cfd5ea; margin: 0; }
.loop-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.loop-chips span { border: 2px solid rgba(199,244,92,.6); color: var(--lime); border-radius: 999px; padding: 8px 16px; font-weight: 700; font-size: 14px; }

/* ---------- outcomes ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.check-list { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 14px; }
.check-list li {
  display: flex; gap: 14px; align-items: flex-start; background: #fff; border-radius: var(--r-sm);
  padding: 14px 18px; box-shadow: var(--shadow); font-weight: 600;
}
.check-list li::before {
  content: "✓"; flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--green); color: #fff;
  display: grid; place-items: center; font-size: 15px; font-weight: 800; margin-top: 1px;
}
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.compare figure { margin: 0; }
.compare img { border-radius: var(--r-md); aspect-ratio: 3/4; object-fit: cover; width: 100%; }
.compare figcaption { font-size: 14px; color: var(--ink-soft); margin-top: 8px; font-weight: 600; }
.compare figure:nth-child(2) { margin-top: 44px; }

/* ---------- photo story ---------- */
.story { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.story figure { margin: 0; }
.story button { all: unset; cursor: zoom-in; display: block; border-radius: var(--r-lg); overflow: hidden; }
.story button:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.story img { aspect-ratio: 4/5; object-fit: cover; width: 100%; transition: transform .5s; }
.story button:hover img { transform: scale(1.04); }
.story figcaption { margin-top: 14px; }
.story figcaption b { display: block; font-size: 18px; }
.story figcaption span { color: var(--ink-soft); font-size: 15px; }

/* ---------- videos ---------- */
.video-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.video-card { width: 100%; max-width: 315px; margin-inline: auto; position: relative; border-radius: var(--r-lg); overflow: hidden; background: var(--navy); aspect-ratio: 9/16; max-height: 560px; }
.video-card video { width: 100%; height: 100%; object-fit: cover; }
.video-card .vlabel {
  position: absolute; left: 14px; bottom: 14px; right: 14px;
  background: rgba(255,255,255,.92); border-radius: 999px; padding: 8px 16px; font-weight: 700; font-size: 14px;
}

/* ---------- school band ---------- */
.school-band { background: var(--navy); color: #fff; border-radius: 56px; padding: 72px 64px; position: relative; overflow: hidden; }
.school-band::after {
  content: ""; position: absolute; right: -80px; bottom: -120px; width: 360px; height: 360px;
  border-radius: 50%; background: radial-gradient(circle at 30% 30%, rgba(199,244,92,.35), transparent 65%);
}
.school-band h2 { font-size: clamp(26px, 3.4vw, 38px); }
.school-band p { color: #cfd5ea; }
.school-band .eyebrow { color: var(--lime); }
.school-band__grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; position: relative; z-index: 1; }
.format-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.format-list li { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14); border-radius: var(--r-sm); padding: 12px 18px; font-weight: 700; }
.format-list li::before { content: "→ "; color: var(--lime); }

/* ---------- FAQ ---------- */
.faq { max-width: 860px; margin: 0 auto; display: grid; gap: 14px; }
.faq details { background: #fff; border-radius: var(--r-md); box-shadow: var(--shadow); overflow: hidden; }
.faq summary {
  list-style: none; cursor: pointer; padding: 22px 64px 22px 26px; font-weight: 800; font-size: 17px; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; font-family: var(--font-en); color: var(--green); margin-right: 12px; }
.faq summary::after {
  content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px; border-radius: 50%; background: var(--green-soft); color: var(--green-dark);
  display: grid; place-items: center; font-size: 20px; transition: transform .2s;
}
.faq details[open] summary::after { content: "−"; }
.faq .answer { padding: 0 26px 24px 54px; color: var(--ink-soft); }
.faq-group-title { font-size: 20px; margin: 18px 0 4px; color: var(--navy); }

/* ---------- CTA band (repeated) ---------- */
.cta-band {
  background: var(--green); color: #fff; border-radius: var(--r-lg); padding: 48px 56px;
  display: grid; grid-template-columns: 1.3fr auto; gap: 32px; align-items: center; position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; left: -60px; top: -60px; width: 220px; height: 220px; border-radius: 50%;
  background: rgba(199,244,92,.25);
}
.cta-band > * { position: relative; }
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 8px; }
.cta-band p { margin: 0; color: #e4f5e8; }
.cta-band .btn--ghost { border-color: #fff; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 40px; }
.contact-card {
  background: #fff; border-radius: var(--r-md); padding: 28px; box-shadow: var(--shadow); text-decoration: none; color: var(--ink);
  transition: transform .2s, box-shadow .2s; display: block;
}
.contact-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lift); }
.contact-card small { display: block; font-family: var(--font-en); letter-spacing: .12em; font-weight: 700; color: var(--green); margin-bottom: 6px; }
.contact-card strong { font-size: 19px; word-break: break-all; }
.info-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.info-card { border-radius: var(--r-md); padding: 26px 28px; background: #fff7e8; }
.info-card:nth-child(2) { background: #ffeeea; }
.info-card small { font-weight: 800; color: #a45500; letter-spacing: .08em; }
.info-card:nth-child(2) small { color: #b3362c; }
.info-card h3 { font-size: 22px; margin: 6px 0; }
.info-card p { margin: 0; color: var(--ink-soft); }

/* ---------- page hero (inner pages) ---------- */
.page-hero { padding: 64px 0 56px; background: var(--cream); position: relative; overflow: hidden; }
.page-hero h1 { font-size: clamp(32px, 4.6vw, 52px); }
.page-hero p { font-size: 18px; color: var(--ink-soft); max-width: 44em; }
.page-hero--navy { background: var(--navy); color: #fff; }
.page-hero--navy p { color: #cfd5ea; }
.page-hero--navy .eyebrow { color: var(--lime); }
.page-hero__grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.page-hero__img { border-radius: 48% 52% 40% 60% / 52% 44% 56% 48%; overflow: hidden; aspect-ratio: 1; }
.page-hero__img img { width: 100%; height: 100%; object-fit: cover; }
.breadcrumb { font-size: 14px; margin-bottom: 18px; color: var(--ink-soft); }
.breadcrumb a { color: inherit; }
.page-hero--navy .breadcrumb { color: #aab3d4; }

/* ---------- course detail ---------- */
.course-detail {
  display: grid; grid-template-columns: 420px 1fr; gap: 48px; align-items: start;
  background: #fff; border-radius: var(--r-lg); box-shadow: var(--shadow); padding: 40px; margin-bottom: 36px;
  --accent: var(--green); scroll-margin-top: 100px;
}
.course-detail__media { position: sticky; top: 100px; }
.course-detail__media img { border-radius: var(--r-md); aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.course-detail__no { font-family: var(--font-en); font-weight: 800; color: var(--accent); font-size: 15px; letter-spacing: .1em; }
.course-detail h2 { font-size: clamp(24px, 3vw, 32px); margin-top: 4px; }
.course-detail .lead { font-size: 17px; }
.course-detail .en-p { color: var(--ink-soft); font-size: 15px; }
.learn-list { list-style: none; padding: 0; margin: 8px 0 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.learn-list li { background: var(--mist); border-radius: 12px; padding: 10px 14px; font-weight: 600; font-size: 15px; border-left: 4px solid var(--accent); }
.course-detail h3 { font-size: 17px; color: var(--accent); margin-top: 8px; }
.pending-note { font-size: 14px; color: var(--ink-soft); background: var(--mist); border-radius: 12px; padding: 10px 14px; margin-bottom: 20px; }
.game-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 24px; }
.game-steps div { background: var(--green-soft); border-radius: 14px; padding: 12px; font-size: 14px; }
.game-steps b { display: block; font-size: 15px; color: var(--green-dark); }

/* school page */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.panel { background: #fff; border-radius: var(--r-lg); padding: 36px; box-shadow: var(--shadow); }
.panel h3 { font-size: 22px; }
.panel ul { margin: 0; padding-left: 1.2em; }
.panel li { margin-bottom: 6px; }
.panel--lime { background: var(--lime); box-shadow: none; }
.panel--mist { background: var(--mist); box-shadow: none; }
.formats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.formats div { background: #fff; border-radius: var(--r-md); padding: 24px 20px; box-shadow: var(--shadow); font-weight: 800; }
.formats span { display: block; font-family: var(--font-en); color: var(--green); font-size: 28px; margin-bottom: 8px; }

/* ---------- footer ---------- */
.site-footer { background: var(--navy); color: #cfd5ea; padding: 72px 0 40px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.footer-logo { background: #fff; border-radius: 20px; padding: 10px 16px; display: inline-block; margin-bottom: 16px; }
.footer-logo img { height: 44px; width: auto; }
.site-footer h4 { color: #fff; font-size: 15px; letter-spacing: .08em; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site-footer a { color: #cfd5ea; text-decoration: none; }
.site-footer a:hover { color: var(--lime); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 48px; padding-top: 24px; font-size: 14px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.tagline { font-weight: 700; color: var(--lime); }

/* floating WhatsApp (mobile) */
.fab-wa {
  position: fixed; right: 16px; bottom: 16px; z-index: 90; display: none;
  align-items: center; gap: 10px; padding: 14px 20px; border-radius: 999px;
  background: var(--wa); color: #0b3d1e; font-weight: 800; text-decoration: none; box-shadow: var(--shadow-lift);
}

/* lightbox */
.lightbox { position: fixed; inset: 0; background: rgba(11,22,63,.9); z-index: 300; display: none; place-items: center; padding: 24px; }
.lightbox.open { display: grid; }
.lightbox img { max-height: 88vh; border-radius: 20px; }
.lightbox button { position: absolute; top: 18px; right: 18px; width: 48px; height: 48px; border-radius: 50%; border: 0; font-size: 24px; cursor: pointer; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .nav__links { display: none; }
  .nav__tools .btn, .nav__tools .lang-toggle { display: none; }
  .menu-btn { display: grid; margin-left: auto; }
  .nav__tools { margin-left: auto; }
  .mobile-menu {
    /* absolute, not fixed: the header's backdrop-filter would trap a fixed child */
    position: absolute; top: 100%; left: 0; right: 0; height: calc(100dvh - 76px);
    background: #fff; z-index: 99; padding: 24px 16px 40px; overflow: auto;
  }
  .menu-open .mobile-menu { display: block; }
  .mobile-menu .lang-toggle { margin-bottom: 20px; }
  .mobile-menu ul { list-style: none; padding: 0; margin: 0 0 24px; }
  .mobile-menu li a { display: block; padding: 16px 4px; border-bottom: 1px solid var(--line); font-size: 20px; font-weight: 800; color: var(--ink); text-decoration: none; }
  .course-grid { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr 1fr; }
  .flow__step::after { display: none; }
  .formats { grid-template-columns: repeat(3, 1fr); }
  .course-detail { grid-template-columns: 1fr; }
  .course-detail__media { position: static; }
}
@media (max-width: 760px) {
  .section { padding: 64px 0; }
  .hero { padding-top: 16px; }
  .hero__grid, .split, .school-band__grid, .page-hero__grid, .two-col, .flow__loop, .cta-band, .footer-grid { grid-template-columns: 1fr; }
  .hero__visual { aspect-ratio: 4/5; max-width: 480px; }
  .hero__badge--a { left: 8px; } .hero__badge--b { right: 8px; }
  .deco--comma { width: 90px; top: auto; bottom: 20px; }
  .course-grid, .story, .video-row, .contact-grid, .info-cards { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .video-card { max-height: 520px; max-width: 340px; margin-inline: auto; width: 100%; }
  .school-band { padding: 48px 24px; border-radius: 36px; }
  .cta-band { padding: 36px 26px; }
  .course-detail { padding: 22px; }
  .learn-list, .game-steps { grid-template-columns: 1fr; }
  .formats { grid-template-columns: 1fr 1fr; }
  .compare figure:nth-child(2) { margin-top: 24px; }
  .btn-row .btn { width: 100%; justify-content: space-between; }
  .fab-wa { display: inline-flex; }
  .site-footer { padding-bottom: 96px; }
  .nav__logo img { height: 40px; }
}