/* QuizStride v25 marketing landing (concept B, light). Mobile first. */
body.lp { padding: 0; background: #ffffff; color: #0d1b2a; }
body.lp::before { display: none; }
.skip { position: absolute; left: -999px; } .skip:focus { left: 12px; top: 12px; background: #fff; padding: 8px 12px; z-index: 10; border-radius: 8px; }
.lp-head { position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 16px; background: rgba(255,255,255,0.94); border-bottom: 1px solid #e3f1f0; backdrop-filter: saturate(1.2) blur(6px); }
.lp-brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.25rem; color: #0d1b2a; text-decoration: none; letter-spacing: -0.02em; }
.lp-brand span:not(.beta-tag) { color: #00796f; margin-left: -8px; }
.lp-brand img { border-radius: 9px; }
.lp-head nav { display: flex; gap: 8px; }
.lp-head .btn.small { min-height: 40px; padding: 6px 12px; font-size: 0.9rem; }

main#main { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
section { padding: 44px 0; }
.lp h2 { font-size: 1.6rem; letter-spacing: -0.02em; text-align: center; margin-bottom: 22px; }
.lp h3 { font-size: 1.08rem; font-weight: 800; }
.btn.big { min-height: 56px; padding: 14px 26px; font-size: 1.1rem; }
.btn.primary { background: #ff7a5a; color: #0d1b2a; border-color: transparent; box-shadow: 0 8px 22px rgba(255,122,90,0.28); }
.btn.primary:hover { background: #ff6a45; }
.btn:not(.primary) { background: #fff; border-color: #cfe7e5; color: #0d1b2a; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.hero { display: grid; gap: 28px; padding-top: 28px; }
.hero h1 { text-align: left; font-size: 2.1rem; line-height: 1.15; letter-spacing: -0.03em; }
.hero .lead { font-size: 1.12rem; color: #33475b; margin: 14px 0 20px; }
.hero em { font-style: normal; color: #00796f; font-weight: 800; }
.fine { margin-top: 12px; color: #4d5b6b; font-size: 0.92rem; }
.hero-art { position: relative; padding: 10px 0 30px; min-height: 260px; }
.laptop { width: 88%; margin-left: 0; }
.laptop-screen { border: 10px solid #0d1b2a; border-bottom-width: 14px; border-radius: 14px 14px 0 0; overflow: hidden; background: #eef7f7; aspect-ratio: 16 / 10; }
.laptop-screen img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.laptop-base { height: 12px; margin: 0 -6%; background: linear-gradient(#cfd8dc, #9aa8b1); border-radius: 0 0 14px 14px; }
.phone { position: absolute; right: 0; bottom: 0; width: 34%; max-width: 210px; border: 7px solid #0d1b2a; border-radius: 26px; overflow: hidden; background: #fff; box-shadow: 0 18px 40px rgba(13,27,42,0.25); aspect-ratio: 390 / 844; }
.phone img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.hero::after { content: none; }
.hero-art::before { content: ''; position: absolute; inset: 10% -4% 0 10%; background: linear-gradient(135deg, rgba(0,179,166,0.18), rgba(30,136,229,0.18)); border-radius: 40px; z-index: -1; }
.steps { background: linear-gradient(135deg, #00b3a6, #1e88e5); margin: 0 -16px; padding: 44px 16px; color: #fff; }
.steps h2 { color: #fff; }
.steps ol { list-style: none; display: grid; gap: 14px; max-width: 1080px; margin: 0 auto; padding: 0; }
.steps li { background: #fff; color: #0d1b2a; border-radius: 18px; padding: 18px 18px 18px 70px; position: relative; }
.steps .num { position: absolute; left: 18px; top: 18px; width: 38px; height: 38px; border-radius: 50%; background: #0d1b2a; color: #fff; display: grid; place-items: center; font-weight: 800; }
.steps p { color: #33475b; margin-top: 4px; }
.feat-grid { display: grid; gap: 22px; }
.feat { background: #f6fbfb; border: 1px solid #dcefed; border-radius: 22px; padding: 16px; display: grid; gap: 14px; }
.feat .shot { background: #eef7f7; border-radius: 16px; overflow: hidden; aspect-ratio: 390 / 520; border: 1px solid #dcefed; }
.feat .shot img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.feat p { color: #33475b; margin-top: 4px; }
.split { display: grid; gap: 18px; }
.split h2 { text-align: left; margin-bottom: 10px; }
.split p { color: #33475b; margin-bottom: 12px; }
.privacy { border-top: 1px solid #e3f1f0; }
.checks { list-style: none; padding: 0; display: grid; gap: 10px; }
.checks li { padding: 12px 14px 12px 44px; background: #f6fbfb; border: 1px solid #dcefed; border-radius: 14px; position: relative; }
.checks li::before { content: '\2713'; position: absolute; left: 14px; top: 11px; width: 20px; height: 20px; border-radius: 50%; background: #00796f; color: #fff; font-size: 0.75rem; display: grid; place-items: center; font-weight: 800; }
.teachers { background: #fff7f3; margin: 0 -16px; padding: 44px 16px; }
.teachers > div { max-width: 760px; margin: 0 auto; }
.faq { max-width: 760px; margin: 0 auto; }
.faq details { border: 1px solid #dcefed; border-radius: 14px; margin-bottom: 10px; background: #fff; }
.faq summary { cursor: pointer; padding: 14px 16px; font-weight: 800; min-height: 48px; }
.faq details p { padding: 0 16px 14px; color: #33475b; }
.faq a, .lp-foot a { color: #00796f; }
.later { margin-top: 16px; font-size: 0.92rem; color: #4d5b6b; text-align: center; }
.final-cta { text-align: center; } .final-cta .cta { justify-content: center; }
.lp-foot { border-top: 1px solid #e3f1f0; padding: 26px 16px 40px; text-align: center; color: #4d5b6b; font-size: 0.9rem; display: grid; gap: 8px; }
.lp-foot nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 18px; }
.lp-foot nav a { min-height: 44px; display: inline-flex; align-items: center; }
a:focus-visible, .btn:focus-visible, summary:focus-visible { outline: 3px solid #1e88e5; outline-offset: 3px; }
@media (min-width: 760px) {
  .hero { grid-template-columns: 1fr 1.1fr; align-items: center; padding-top: 56px; }
  .hero h1 { font-size: 2.9rem; }
  .steps ol { grid-template-columns: repeat(3, 1fr); }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr 1.2fr; align-items: start; }
  .lp-head { padding: 12px 28px; }
}
@media (min-width: 1040px) { .feat-grid { grid-template-columns: repeat(3, 1fr); } }
.lp-head .btn { white-space: nowrap; }
@media (max-width: 480px) { .lp-head { padding: 8px 12px; } .lp-brand { font-size: 1.1rem; gap: 6px; } .lp-brand img { width: 30px; height: 30px; } .lp-head .beta-tag { margin-left: 4px; padding: 1px 6px; font-size: 0.62rem; } .lp-head nav { gap: 6px; } .lp-head .btn.small { min-height: 40px; padding: 6px 10px; font-size: 0.84rem; } }
@media (max-width: 360px) { .lp-head .btn.small:first-child { display: none; } }