/* ================= Base ================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, select, input { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; letter-spacing: -0.03em; line-height: 1; font-weight: 750; }
p { margin: 0; }

.container { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.section { padding: 112px 0 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 44px; }
h2 { font-size: clamp(34px, 4.6vw, 60px); }

.ic { flex: none; }
[data-icon] { display: inline-flex; }

/* ================= Buttons ================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 52px; padding: 0 26px;
  border-radius: 999px; border: 2px solid var(--ink);
  font-weight: 650; font-size: 16px; white-space: nowrap; cursor: pointer;
  transition: transform .15s var(--ease), box-shadow .15s var(--ease), background .2s;
}
.btn-primary { background: var(--brand); color: var(--brand-ink); box-shadow: var(--pop); }
.btn-dark { background: var(--ink); color: #fff; box-shadow: 0 4px 0 rgba(0,0,0,.25); }
.btn-ghost { background: transparent; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 0 var(--ink); }
.btn-dark:hover { transform: translateY(-2px); box-shadow: 0 6px 0 rgba(0,0,0,.3); }
.btn:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--ink); }
.btn-sm { height: 42px; padding: 0 18px; font-size: 15px; box-shadow: var(--pop-sm); }
.btn-lg { height: 60px; padding: 0 30px; font-size: 17px; }
.btn-xl { height: 72px; padding: 0 40px; font-size: 19px; }

.link-arrow { display: inline-flex; gap: 8px; align-items: center; font-weight: 650; border-bottom: 2px solid var(--ink); padding-bottom: 2px; white-space: nowrap; }
.link-arrow .ic { transition: transform .2s var(--ease); }
.link-arrow:hover .ic { transform: translateX(4px); }

.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; font-size: 15px; color: var(--ink-2); margin-bottom: 22px; }
.eyebrow .dot { width: 18px; height: 3px; border-radius: 2px; background: currentColor; }
.eyebrow--light { color: rgba(255,255,255,.75); }
.eyebrow--light .dot { background: var(--brand); }

/* ================= Nav ================= */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(251,247,240,.86); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); transition: box-shadow .25s; }
.nav.scrolled { box-shadow: 0 1px 0 var(--line); }
.nav-inner { height: 76px; display: flex; align-items: center; gap: 36px; }
.logo { display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-display); font-weight: 800; font-size: 26px; letter-spacing: -0.04em; }
.logo-mark { display: inline-flex; }
.nav-links { display: flex; gap: 28px; font-weight: 550; font-size: 16px; }
.nav-links > a { position: relative; padding: 6px 0; }
.nav-links > a::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--brand); transform: scaleX(0); transform-origin: left; transition: transform .25s var(--ease); }
.nav-links > a:hover::after { transform: scaleX(1); }
.nav-mobile-actions { display: none; }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 18px; }
.nav-lang { background: none; border: 0; font-weight: 600; font-size: 14px; color: var(--ink-2); cursor: pointer; padding: 8px; }
.nav-login { font-weight: 650; }
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 50%; border: 2px solid var(--ink); background: var(--card); cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.nav-toggle span { width: 16px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .25s var(--ease); }
.nav.open .nav-toggle span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav.open .nav-toggle span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* ================= Hero ================= */
.hero { padding: 48px 0 72px; position: relative; isolation: isolate; }
.hero::before {
  content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image: radial-gradient(rgba(22,20,26,.09) 1px, transparent 1.4px);
  background-size: 22px 22px;
  mask-image: radial-gradient(ellipse 70% 60% at 70% 40%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 70% 40%, #000 20%, transparent 75%);
}
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(52px, 7.6vw, 108px); font-weight: 800; letter-spacing: -0.045em; line-height: .92; margin-bottom: 26px; }
.scribble { position: relative; display: inline-block; color: var(--brand); }
.scribble svg { position: absolute; left: -2%; bottom: -.12em; width: 104%; height: .28em; overflow: visible; }
.scribble path { fill: none; stroke: var(--ink); stroke-width: 7; stroke-linecap: round; stroke-dasharray: 340; stroke-dashoffset: 340; animation: draw 1s .7s var(--ease) forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.lede { font-size: 20px; color: var(--ink-2); max-width: 520px; margin-bottom: 34px; }

.search {
  display: flex; align-items: stretch;
  background: var(--card); border: 2px solid var(--ink); border-radius: 26px; box-shadow: var(--pop);
  padding: 8px; max-width: 620px;
}
.search-field { flex: 1; display: flex; flex-direction: column; justify-content: center; padding: 6px 18px; min-width: 0; cursor: pointer; }
.search-field + .search-field { border-left: 1.5px solid var(--line); }
.search-label { font-size: 12px; font-weight: 650; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); }
.search select {
  appearance: none; -webkit-appearance: none; border: 0; background: transparent; outline: none;
  font-weight: 650; font-size: 18px; padding: 2px 22px 2px 0; cursor: pointer; width: 100%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2316141A' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right center;
}
.search .btn { border-radius: 18px; box-shadow: none; height: auto; min-height: 60px; }
.search .btn:hover { transform: none; box-shadow: none; background: var(--brand-deep); }
.search .btn:active { transform: scale(.98); box-shadow: none; }

.trust { display: flex; align-items: center; gap: 16px; margin-top: 30px; }
.avatar-stack { display: flex; }
.avatar-stack img { width: 44px; height: 44px; border-radius: 50%; border: 3px solid var(--paper); margin-left: -12px; object-fit: cover; background: var(--paper-2); }
.avatar-stack img:first-child { margin-left: 0; }
.stars { display: flex; align-items: center; gap: 2px; font-size: 16px; }
.stars .ic { width: 17px; height: 17px; color: var(--brand); }
.stars b { margin-left: 6px; }
.trust small { color: var(--ink-3); font-size: 14px; }

/* Hero art */
.hero-art { position: relative; aspect-ratio: 1 / 1.08; max-width: 560px; justify-self: end; width: 100%; }
.arch {
  position: absolute; inset: 6% 12% 0 12%;
  border-radius: 999px 999px 40px 40px; border: 2px solid var(--ink);
  background: var(--brand); overflow: hidden; box-shadow: 10px 10px 0 var(--ink);
  animation: rise .9s .1s var(--ease) both;
}
.arch img { width: 100%; height: 100%; object-fit: cover; }
.float {
  position: absolute; background: var(--card); border: 2px solid var(--ink); border-radius: 20px;
  box-shadow: var(--pop); padding: 12px 14px; font-size: 14px;
  animation: pop .6s var(--ease) both, bob 6s ease-in-out infinite;
}
.float small { display: block; color: var(--ink-3); font-size: 12px; font-weight: 600; }
.float b { font-family: var(--font-display); font-size: 17px; letter-spacing: -0.02em; }
.f1 { top: 16%; left: -4%; display: flex; align-items: center; gap: 10px; animation-delay: .5s, 1.1s; padding-right: 36px; }
.f1 img { width: 44px; height: 44px; border-radius: 12px; object-fit: cover; }
.live { position: absolute; right: 14px; top: 50%; width: 9px; height: 9px; margin-top: -4.5px; border-radius: 50%; background: var(--ok); }
.f2 { right: -4%; top: 40%; width: 230px; display: flex; flex-direction: column; gap: 8px; background: var(--paper); animation-delay: .7s, 0s; }
.bubble { padding: 9px 12px; border-radius: 14px; font-size: 14px; line-height: 1.35; max-width: 90%; }
.bubble.them { background: var(--card); border: 1.5px solid var(--line); border-bottom-left-radius: 4px; }
.bubble.me { background: var(--ink); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.f3 { left: 2%; bottom: 14%; background: var(--sun); font-weight: 700; font-size: 16px; display: flex; gap: 6px; align-items: center; rotate: -6deg; animation-delay: .9s, 1.5s; }
.f3 .ic { width: 18px; height: 18px; }
.f4 { right: 4%; bottom: -2%; width: 180px; animation-delay: 1.1s, .6s; }
.f4 b { font-size: 30px; display: block; line-height: 1.1; }
.bars { display: flex; align-items: flex-end; gap: 5px; height: 38px; margin-top: 6px; }
.bars i { flex: 1; height: var(--h); background: var(--mint); border: 1.5px solid var(--ink); border-radius: 4px; }
.bars i:last-child { background: var(--brand); }

@keyframes rise { from { opacity: 0; transform: translateY(40px) scale(.96); } }
@keyframes pop { from { opacity: 0; transform: translateY(16px) scale(.9); } }
@keyframes bob { 50% { translate: 0 -8px; } }

/* ================= Marquee ================= */
.marquee-wrap { overflow: hidden; padding: 16px 0; }
.marquee { border-block: 2px solid var(--ink); background: var(--ink); overflow: hidden; padding: 18px 0; transform: rotate(-1.2deg); margin: 0 -20px; }
.marquee-track { display: flex; width: max-content; animation: slide 36s linear infinite; }
.marquee span { font-family: var(--font-display); font-weight: 800; font-size: clamp(34px, 5vw, 64px); letter-spacing: -0.03em; color: transparent; -webkit-text-stroke: 1.5px var(--paper); padding: 0 28px; line-height: 1.1; display: inline-flex; align-items: center; gap: 56px; white-space: nowrap; }
.marquee span::after { content: '✦'; color: var(--brand); -webkit-text-stroke: 0; font-size: .5em; }
.marquee span:nth-child(4n+1) { color: var(--brand); -webkit-text-stroke: 0; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ================= Stats ================= */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding-top: 88px; }
.stat { border-top: 2px solid var(--ink); padding-top: 18px; }
.stat b { display: block; font-family: var(--font-display); font-weight: 750; font-size: clamp(34px, 4vw, 52px); letter-spacing: -0.04em; line-height: 1; margin-bottom: 6px; }
.stat span { color: var(--ink-2); font-size: 16px; }

/* ================= Languages ================= */
.lang-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.lang-card {
  position: relative; display: flex; flex-direction: column; justify-content: space-between; gap: 30px;
  padding: 22px; min-height: 200px; border-radius: var(--r-lg); border: 2px solid var(--ink);
  background: var(--card); transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.lang-card:hover { transform: translateY(-4px) rotate(-.6deg); box-shadow: 6px 8px 0 var(--ink); }
.lang-glyph { width: 72px; height: 72px; border-radius: 20px; border: 2px solid var(--ink); display: grid; place-items: center; font-family: var(--font-display); font-size: 36px; font-weight: 750; line-height: 1; }
.lang-card h3 { font-size: 28px; margin-bottom: 4px; }
.lang-card small { color: var(--ink-3); font-size: 15px; }
.lang-card .arrow-dot { position: absolute; right: 18px; top: 18px; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; border: 2px solid var(--ink); transition: background .2s, transform .3s var(--ease); }
.lang-card:hover .arrow-dot { background: var(--brand); transform: rotate(-45deg); }

/* ================= How ================= */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { background: var(--card); border: 2px solid var(--ink); border-radius: var(--r-xl); padding: 30px; display: flex; flex-direction: column; min-height: 400px; }
.step-n { font-family: var(--font-display); font-weight: 800; font-size: 60px; letter-spacing: -0.05em; color: var(--brand); line-height: 1; margin-bottom: 26px; }
.step h3 { font-size: 30px; margin-bottom: 12px; }
.step p { color: var(--ink-2); }
.step-visual { margin-top: auto; padding-top: 28px; }
.step--dark { background: var(--ink); color: #fff; }
.step--dark p { color: rgba(255,255,255,.72); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { padding: 8px 14px; border-radius: 999px; border: 1.5px solid var(--line-strong); font-size: 14px; font-weight: 600; }
.chip.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.slots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.slots span { text-align: center; padding: 10px 0; border-radius: 12px; border: 1.5px solid var(--line-strong); font-weight: 650; font-size: 15px; }
.slots .on { background: var(--brand); border-color: var(--ink); box-shadow: var(--pop-sm); }
.slots .off { color: var(--ink-3); text-decoration: line-through; border-style: dashed; }
.streak { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.streak i { width: 26px; height: 26px; border-radius: 8px; background: rgba(255,255,255,.12); }
.streak i.on { background: var(--mint); }
.streak i.today { background: var(--brand); }
.streak > span { flex-basis: 100%; margin-top: 12px; display: flex; gap: 6px; align-items: center; font-weight: 650; }
.streak .ic { color: var(--brand); }

/* ================= Feature / phone ================= */
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.feature h2 { margin-bottom: 36px; }
.ticks { list-style: none; padding: 0; margin: 0 0 40px; display: grid; gap: 22px; }
.ticks li { display: flex; gap: 16px; }
.ticks li > span { width: 48px; height: 48px; border-radius: 14px; flex: none; display: grid; place-items: center; background: var(--brand-soft); border: 2px solid var(--ink); }
.ticks b { font-size: 18px; }
.ticks p { color: var(--ink-2); font-size: 16px; }
.feature-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; }
.feature-cta small { color: var(--ink-3); font-size: 14px; max-width: 200px; }

.phone-wrap { position: relative; display: grid; place-items: center; padding: 30px 0; isolation: isolate; }
.phone-blob { position: absolute; inset: 8% 4%; background: var(--sun); border: 2px solid var(--ink); border-radius: 46% 54% 40% 60% / 55% 40% 60% 45%; z-index: -1; animation: morph 14s ease-in-out infinite; }
@keyframes morph { 50% { border-radius: 58% 42% 55% 45% / 42% 58% 42% 58%; transform: rotate(8deg); } }
.phone { width: 300px; height: 610px; border-radius: 46px; background: var(--ink); padding: 12px; box-shadow: 14px 16px 0 rgba(22,20,26,.9); position: relative; transform: rotate(3deg); }
.phone-notch { position: absolute; top: 20px; left: 50%; width: 90px; height: 24px; margin-left: -45px; background: var(--ink); border-radius: 20px; z-index: 2; }
.phone-screen { background: var(--paper); height: 100%; border-radius: 36px; overflow: hidden; padding: 54px 16px 0; display: flex; flex-direction: column; gap: 12px; font-size: 13px; }
.ps-top { display: flex; justify-content: space-between; align-items: center; }
.ps-top small { color: var(--ink-3); display: block; font-size: 11px; }
.ps-top b { font-family: var(--font-display); font-size: 21px; letter-spacing: -0.03em; }
.ps-avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--lilac); border: 1.5px solid var(--ink); display: grid; place-items: center; font-weight: 700; }
.ps-next { background: var(--ink); color: #fff; border-radius: 20px; padding: 14px; }
.ps-next small { color: rgba(255,255,255,.65); font-size: 11px; }
.ps-next-row { display: flex; gap: 10px; align-items: center; margin: 10px 0 12px; }
.ps-next-row img { width: 40px; height: 40px; border-radius: 12px; object-fit: cover; }
.ps-next-row b { display: block; font-size: 14px; }
.ps-join { display: block; text-align: center; background: var(--brand); color: var(--ink); font-weight: 700; border-radius: 12px; padding: 9px; }
.ps-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.ps-stats div { background: var(--card); border: 1.5px solid var(--line); border-radius: 14px; padding: 10px; }
.ps-stats b { font-family: var(--font-display); font-size: 20px; display: block; line-height: 1.1; }
.ps-stats small { color: var(--ink-3); font-size: 10.5px; }
.ps-phrase { background: var(--mint); border: 1.5px solid var(--ink); border-radius: 18px; padding: 14px; }
.ps-phrase small { display: block; font-size: 11px; color: var(--ink-2); font-weight: 600; }
.ps-phrase b { font-family: var(--font-display); font-size: 22px; display: block; letter-spacing: -0.02em; margin: 4px 0 2px; }
.ps-phrase span { color: var(--ink-2); }
.ps-tab { margin-top: auto; display: flex; justify-content: space-around; padding: 14px 10px 24px; border-top: 1px solid var(--line); background: var(--card); margin-inline: -16px; }
.ps-tab i { width: 22px; height: 22px; border-radius: 7px; background: var(--line); }
.ps-tab i.on { background: var(--ink); }

/* ================= Tutor rail ================= */
.scroll-btns { display: flex; gap: 10px; }
.round-btn { width: 52px; height: 52px; border-radius: 50%; border: 2px solid var(--ink); background: var(--card); display: grid; place-items: center; cursor: pointer; transition: background .2s, transform .15s; }
.round-btn:hover { background: var(--brand); }
.round-btn:active { transform: scale(.94); }
.tutor-rail {
  display: flex; gap: 18px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none;
  padding: 6px max(24px, calc((100vw - 1240px) / 2 + 24px)) 18px;
  scroll-padding-inline: max(24px, calc((100vw - 1240px) / 2 + 24px));
}
.tutor-rail::-webkit-scrollbar { display: none; }
.t-card {
  flex: none; width: 290px; scroll-snap-align: start; background: var(--card); border: 2px solid var(--ink);
  border-radius: var(--r-lg); overflow: hidden; display: flex; flex-direction: column;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.t-card:hover { transform: translateY(-4px); box-shadow: 6px 8px 0 var(--ink); }
.t-photo { position: relative; aspect-ratio: 1 / .95; background: var(--paper-2); border-bottom: 2px solid var(--ink); }
.t-photo img { width: 100%; height: 100%; object-fit: cover; }
.t-badge { position: absolute; left: 12px; top: 12px; background: var(--sun); border: 1.5px solid var(--ink); border-radius: 999px; font-size: 12px; font-weight: 700; padding: 4px 10px; display: flex; gap: 4px; align-items: center; }
.t-badge .ic { width: 13px; height: 13px; }
.t-body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.t-name { display: flex; align-items: center; gap: 6px; font-family: var(--font-display); font-size: 22px; font-weight: 750; letter-spacing: -0.03em; }
.t-meta { color: var(--ink-2); font-size: 14px; }
.t-row { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 12px; }
.t-rating { display: flex; align-items: center; gap: 4px; font-weight: 700; font-size: 15px; }
.t-rating .ic { width: 16px; height: 16px; color: var(--brand); }
.t-rating small { color: var(--ink-3); font-weight: 500; }
.t-price b { font-family: var(--font-display); font-size: 22px; }
.t-price small { color: var(--ink-3); font-size: 13px; }

/* ================= Quotes ================= */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.quote { margin: 0; border: 2px solid var(--ink); border-radius: var(--r-xl); padding: 30px; display: flex; flex-direction: column; justify-content: space-between; gap: 34px; min-height: 320px; }
.quote blockquote { margin: 0; font-family: var(--font-display); font-weight: 600; font-size: 24px; line-height: 1.2; letter-spacing: -0.02em; }
.quote figcaption { display: flex; gap: 12px; align-items: center; }
.initial { width: 46px; height: 46px; border-radius: 50%; background: var(--card); border: 2px solid var(--ink); display: grid; place-items: center; font-weight: 800; font-family: var(--font-display); font-size: 20px; flex: none; }
.quote small { display: block; color: var(--ink-2); font-size: 14px; }

/* ================= Guarantee ================= */
.guarantee { margin-top: 140px; display: flex; align-items: center; gap: 32px; background: var(--sun); border: 2px solid var(--ink); border-radius: var(--r-xl); padding: 40px 44px; box-shadow: 10px 10px 0 var(--ink); }
.guarantee h2 { font-size: clamp(28px, 3.2vw, 42px); margin-bottom: 10px; }
.guarantee p { color: var(--ink-2); max-width: 560px; }
.guarantee .btn { margin-left: auto; }
.guarantee-badge { width: 92px; height: 92px; flex: none; border-radius: 50%; border: 2px solid var(--ink); background: var(--card); display: grid !important; place-items: center; transform: rotate(-8deg); }
.guarantee-badge .ic { width: 44px; height: 44px; }

/* ================= Teach ================= */
.teach { margin-top: 112px; background: var(--ink); color: #fff; padding-bottom: 112px; border-radius: 48px 48px 0 0; }
.teach-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.teach h2 { margin-bottom: 34px; }
.teach-list { list-style: none; padding: 0; margin: 0 0 40px; display: grid; gap: 16px; font-size: 18px; }
.teach-list li { display: flex; gap: 14px; align-items: center; }
.teach-list .ic { color: var(--brand); }
.teach .btn-primary { box-shadow: 0 4px 0 #000; border-color: var(--brand); }
.teach-collage { position: relative; height: 480px; }
.teach-collage img { position: absolute; border-radius: 28px; border: 2px solid #fff; object-fit: cover; background: #2a2730; }
.tc1 { width: 52%; aspect-ratio: 1; left: 0; top: 4%; transform: rotate(-5deg); }
.tc2 { width: 44%; aspect-ratio: 1; right: 2%; top: 0; transform: rotate(4deg); }
.tc3 { width: 46%; aspect-ratio: 1; left: 30%; bottom: 0; transform: rotate(-2deg); }
.teach-earn { position: absolute; right: 0; bottom: 18%; background: var(--brand); color: var(--ink); border: 2px solid #fff; border-radius: 22px; padding: 16px 20px; box-shadow: 6px 6px 0 #fff; transform: rotate(3deg); }
.teach-earn small { display: block; font-weight: 600; font-size: 13px; }
.teach-earn b { font-family: var(--font-display); font-size: 38px; letter-spacing: -0.04em; display: block; line-height: 1.05; }
.teach-earn span { font-size: 14px; }

/* ================= Business ================= */
.biz { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; background: var(--card); border: 2px solid var(--ink); border-radius: var(--r-xl); padding: 48px; align-items: center; }
.biz h2 { font-size: clamp(30px, 3.6vw, 46px); margin-bottom: 16px; }
.biz p { color: var(--ink-2); margin-bottom: 28px; max-width: 480px; }
.biz-points { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.biz-points li { display: flex; align-items: baseline; gap: 14px; padding: 18px 22px; border-radius: 20px; background: var(--paper); border: 1.5px solid var(--line); }
.biz-points b { font-family: var(--font-display); font-size: 24px; letter-spacing: -0.03em; min-width: 120px; }
.biz-points span { color: var(--ink-2); }

/* ================= FAQ ================= */
.faq-wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
.faq { border-top: 2px solid var(--ink); }
.faq details { border-bottom: 2px solid var(--ink); }
.faq summary { list-style: none; cursor: pointer; padding: 24px 50px 24px 0; font-family: var(--font-display); font-weight: 650; font-size: 22px; letter-spacing: -0.02em; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 0; top: 50%; width: 36px; height: 36px; margin-top: -18px; border-radius: 50%; border: 2px solid var(--ink); display: grid; place-items: center; font-family: var(--font-body); font-size: 22px; font-weight: 500; line-height: 1; transition: transform .25s var(--ease), background .2s; }
.faq details[open] summary::after { transform: rotate(45deg); background: var(--brand); }
.faq p { padding: 0 50px 26px 0; color: var(--ink-2); }

/* ================= Final CTA ================= */
.final { text-align: center; padding: 140px 24px 120px; }
.final h2 { font-size: clamp(42px, 6.4vw, 88px); margin-bottom: 40px; }

/* ================= Footer ================= */
.footer { background: var(--ink); color: rgba(255,255,255,.72); padding: 72px 0 36px; font-size: 15px; }
.logo--light { color: #fff; }
.footer-top { display: grid; grid-template-columns: 1fr 2fr; gap: 48px; }
.footer-brand p { margin: 16px 0 22px; max-width: 280px; }
.footer-selects { display: flex; gap: 10px; }
.footer-selects button { background: transparent; border: 1.5px solid rgba(255,255,255,.25); color: #fff; border-radius: 999px; padding: 8px 14px; display: inline-flex; gap: 6px; align-items: center; cursor: pointer; font-size: 14px; }
.footer-selects .ic { width: 16px; height: 16px; }
.footer-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.footer-cols h4 { color: #fff; font-size: 16px; letter-spacing: 0; font-family: var(--font-body); font-weight: 700; margin-bottom: 14px; }
.footer-cols a { display: block; padding: 5px 0; transition: color .2s; }
.footer-cols a:hover { color: var(--brand); }
.footer-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12); display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.app-pill { display: inline-flex; gap: 8px; align-items: center; color: #fff; border: 1.5px solid rgba(255,255,255,.3); border-radius: 999px; padding: 10px 16px; font-weight: 600; }
.app-pill:hover { border-color: var(--brand); color: var(--brand); }

/* ================= Toast ================= */
.toast { position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 30px); opacity: 0; pointer-events: none; background: var(--ink); color: #fff; padding: 14px 20px; border-radius: 16px; font-weight: 600; font-size: 15px; transition: all .3s var(--ease); z-index: 100; max-width: calc(100vw - 32px); box-shadow: var(--soft); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ================= Reveal on scroll ================= */
.reveal { opacity: 0; translate: 0 24px; transition: opacity .7s var(--ease), translate .7s var(--ease); transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; translate: 0 0; }
.quote:nth-child(2) { transform: translateY(26px); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; translate: none; }
  .marquee-track { animation: none; }
}

/* ================= Responsive ================= */
@media (max-width: 1080px) {
  .nav-links { gap: 20px; }
  .nav-lang { display: none; }
  .lang-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .step { min-height: 0; }
  .feature, .teach-grid, .biz, .faq-wrap { grid-template-columns: 1fr; }
  .phone-wrap { order: -1; }
  .quotes { grid-template-columns: 1fr; }
  .quote:nth-child(2) { transform: none; }
  .quote { min-height: 0; }
  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .nav-inner { gap: 16px; }
  .nav-links {
    position: fixed; top: 76px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--paper);
    padding: 12px 24px 28px; border-bottom: 2px solid var(--ink); font-size: 22px; font-family: var(--font-display); font-weight: 650;
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: all .25s var(--ease);
  }
  .nav.open .nav-links { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links > a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-links > a::after { display: none; }
  .nav-mobile-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 20px; }
  .nav-mobile-actions .btn { font-family: var(--font-body); font-size: 16px; }
  .nav-toggle { display: flex; }
  .nav-login { display: none; }

  .hero { padding-top: 24px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-art { justify-self: center; max-width: 460px; }
  .stats { grid-template-columns: repeat(2, 1fr); row-gap: 32px; }
  .guarantee { flex-direction: column; align-items: flex-start; padding: 32px; }
  .guarantee .btn { margin-left: 0; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .container { padding: 0 16px; }
  .section { padding-top: 80px; }
  .section-head { flex-direction: column; align-items: flex-start; margin-bottom: 30px; }
  .nav-actions .btn-sm { display: none; }
  .nav-links { padding-inline: 16px; }
  .lede { font-size: 18px; }
  .search { flex-direction: column; border-radius: 22px; }
  .search-field { padding: 10px 14px; }
  .search-field + .search-field { border-left: 0; border-top: 1.5px solid var(--line); }
  .search .btn { margin-top: 6px; }
  .f1 { left: -2%; top: 8%; }
  .f2 { right: -2%; width: 190px; }
  .bubble { font-size: 13px; }
  .f4 { width: 150px; right: 0; }
  .f4 b { font-size: 24px; }
  .arch { inset: 4% 10% 0 10%; box-shadow: 6px 6px 0 var(--ink); }
  .lang-grid { gap: 12px; }
  .lang-card { min-height: 170px; padding: 16px; }
  .lang-glyph { width: 56px; height: 56px; font-size: 28px; border-radius: 16px; }
  .lang-card h3 { font-size: 22px; }
  .lang-card small { font-size: 13px; }
  .lang-card .arrow-dot { width: 32px; height: 32px; right: 12px; top: 12px; }
  .step { padding: 24px; border-radius: var(--r-lg); }
  .tutor-rail { padding-inline: 16px; scroll-padding-inline: 16px; }
  .t-card { width: 250px; }
  .scroll-btns { display: none; }
  .quote { padding: 24px; border-radius: var(--r-lg); }
  .quote blockquote { font-size: 21px; }
  .guarantee { margin-top: 90px; box-shadow: 6px 6px 0 var(--ink); border-radius: var(--r-lg); }
  .teach { border-radius: 32px 32px 0 0; padding-bottom: 80px; margin-top: 80px; }
  .teach-collage { height: 360px; }
  .biz { padding: 28px; border-radius: var(--r-lg); }
  .biz-points b { min-width: 0; font-size: 20px; }
  .biz-points li { flex-direction: column; gap: 2px; }
  .faq summary { font-size: 19px; }
  .how h2 br { display: none; }
  .final { padding: 100px 16px 90px; }
  .btn-xl { height: auto; min-height: 64px; padding: 14px 26px; white-space: normal; font-size: 17px; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
  .phone { transform: rotate(2deg) scale(.92); }
}