:root {
  --ink: #13204a;
  --blue: #287ff5;
  --blue-d: #1765cf;
  --soft: #eef1f4;
  --muted: #707987;
  --border: #d5dbe3;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #f7f8fa; color: var(--ink); font-family: "Plus Jakarta Sans", sans-serif; }
.shell { width: min(100% - 44px, 950px); margin: auto; }
.header, .header a, footer a { display: flex; align-items: center; }
.header { justify-content: space-between; padding: 24px 0; }
.brand { color: var(--ink); font: 900 56px Nunito, sans-serif; letter-spacing: -.045em; text-decoration: none; }
.header > a:not(.brand) { color: var(--blue); font: 900 11px Nunito, sans-serif; letter-spacing: .08em; text-decoration: none; }
.header > .brand { color: var(--blue); font-size: 44px; }
.coming-soon { color: var(--muted); font: 800 10px Nunito, sans-serif; letter-spacing: .1em; }

.hero { display: grid; gap: 32px; align-items: center; padding: 45px 0 110px; }
.hero-copy { order: -1; }
.placeholder {
  display: grid;
  place-items: center;
  width: min(100%, 230px);
  min-height: 0;
  aspect-ratio: 9 / 16;
  margin-inline: auto;
  border: 2px dashed var(--border);
  border-radius: 24px;
  background: var(--soft);
  color: #7d8795;
  text-align: center;
  font: 900 11px Nunito, sans-serif;
  letter-spacing: .09em;
}
.screenshot { overflow: hidden; padding: 0; aspect-ratio: 1170 / 2532; border-width: 0; background: #fff; }
.screenshot img { display: block; width: 100%; height: 100%; object-fit: contain; }
.hero-placeholder { min-height: 310px; }

.hero h1, .benefits h2, .chat-feature h2, .anywhere h2, .final h2 {
  margin: 13px 0;
  color: var(--blue);
  font: 800 clamp(33px, 8vw, 55px) / 1.02 Nunito, sans-serif;
  letter-spacing: -.055em;
}
.hero-copy > p, .benefits p, .chat-feature p, .final > div > p { color: var(--muted); font-size: 14px; line-height: 1.65; }
.primary, .secondary, button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 12px 18px;
  border-radius: 9px;
  font: 900 11px Nunito, sans-serif;
  letter-spacing: .04em;
  text-decoration: none;
}
.primary, button { margin: 10px 8px 0 0; border: 0; background: var(--blue); box-shadow: inset 0 -4px var(--blue-d); color: #fff; cursor: pointer; }
.secondary { color: var(--blue); border: 2px solid #d8e7fb; }

.intro { padding: 35px 0 95px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.intro strong { color: var(--blue); }
.benefits article, .chat-feature { display: grid; gap: 30px; align-items: center; margin-bottom: 110px; }
.benefits article:nth-child(even) > :first-child, .chat-feature > :first-child { order: 2; }
.phone { width: min(100%, 230px); justify-self: center; }
.scene, .cards { min-height: 210px; }
.chat-phone { background: #eef1f4; }

.study-anywhere { padding: 84px 0; background: var(--blue); color: #fff; }
.study-anywhere > div { display: grid; justify-items: center; gap: 22px; text-align: center; }
.study-anywhere h2 { margin: 0; font: 800 clamp(48px, 13vw, 82px) / .95 Nunito, sans-serif; letter-spacing: -.065em; }
.study-anywhere p { max-width: 430px; margin: 0; color: #e8f1ff; font-size: 15px; line-height: 1.65; }

.anywhere { padding: 90px 0; background: var(--soft); text-align: center; }
.anywhere h2 { font-size: clamp(34px, 9vw, 58px); }
.devices { min-height: 255px; margin-top: 30px; }

.faq { display: grid; gap: 30px; padding: 100px 0; }
.faq h2 { margin: 0 0 12px; color: var(--blue); font: 800 clamp(33px, 8vw, 55px) / 1.02 Nunito, sans-serif; letter-spacing: -.055em; }
.faq-intro > p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.faq-list { border-top: 1px solid var(--border); }
.faq details { border-bottom: 1px solid var(--border); }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0; color: var(--ink); cursor: pointer; font: 800 17px / 1.3 Nunito, sans-serif; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: 0 0 auto; color: var(--blue); font: 800 26px / 1 Nunito, sans-serif; }
.faq details[open] summary::after { content: "−"; }
.faq details > p { max-width: 600px; margin: -4px 0 20px; color: var(--muted); font-size: 14px; line-height: 1.65; }

.final { display: grid; gap: 35px; align-items: center; padding: 100px 0; }
.final-art { min-height: 240px; }
.final form { display: grid; gap: 9px; margin-top: 22px; }
.final input { height: 48px; padding: 0 14px; border: 2px solid #dae6f5; border-radius: 9px; outline: none; }
.final input:focus { border-color: var(--blue); }
#message { min-height: 20px; color: var(--blue); font-size: 12px; font-weight: 700; }
.trap { position: absolute; left: -9999px; }

footer { padding: 26px 0; border-top: 1px solid #d7dfe9; background: #e7edf4; }
footer > div { display: flex; align-items: center; justify-content: space-between; }
footer small { color: var(--muted); font-size: 11px; }

@media (min-width: 700px) {
  .hero { grid-template-columns: 1fr 1fr; padding: 80px 0 130px; }
  .hero-copy { order: 0; }
  .benefits article, .chat-feature { grid-template-columns: 1fr 1fr; }
  .benefits article:nth-child(even) > :first-child, .chat-feature > :first-child { order: 0; }
  .faq { grid-template-columns: .8fr 1.2fr; align-items: start; }
  .final { grid-template-columns: 1fr 1fr; }
}

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }