:root {
    --primary: #7B61FF;
    --primary-light: #9E8CFF;
    --bg: #F6F7FC;
    --surface: #FFFFFF;
    --surface-alt: #F1F1F8;
    --text: #1B1B1F;
    --muted: #777785;
    --border: #E8E8EF;
    --radius: 20px;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

/* Kills the ~300ms double-tap-zoom delay on tappable elements in mobile
   browsers without disabling pinch zoom (only double-tap). */
a, .btn { touch-action: manipulation; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: "Outfit", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

/* Hidden until landing.js confirms there's no active session, so a
   logged-in visitor never sees a flash of marketing content before
   being sent straight to the app. */
body.auth-check .site { visibility: hidden; }

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 8px; border: none; border-radius: 999px; cursor: pointer;
    font: inherit; font-weight: 700; font-size: .92rem;
    padding: 12px 22px; transition: transform .15s ease;
}
.btn:active { transform: scale(.96); }
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff; box-shadow: 0 14px 30px rgba(123, 97, 255, .28);
}
.btn-ghost { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn-lg { padding: 15px 28px; font-size: 1rem; }

/* ---------------- TOP NAV ---------------- */
.site-nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(246, 247, 252, .85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}
.site-nav .wrap {
    display: flex; align-items: center; justify-content: space-between;
    height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.2rem; }
.brand img { width: 32px; height: 32px; border-radius: 9px; }
.nav-actions { display: flex; align-items: center; gap: 10px; }

/* ---------------- HERO ---------------- */
.hero { padding: 56px 0 40px; }
.hero .wrap { display: flex; flex-direction: column; gap: 34px; align-items: center; text-align: center; }
.hero-copy { max-width: 640px; }
.eyebrow {
    display: inline-block; padding: 6px 14px; border-radius: 999px;
    background: rgba(123, 97, 255, .12); color: var(--primary);
    font-size: .8rem; font-weight: 800; letter-spacing: .02em;
    margin-bottom: 18px;
}
.hero h1 { font-size: 2.1rem; font-weight: 800; line-height: 1.15; letter-spacing: -.01em; }
.hero h1 span { color: var(--primary); }
.hero p.lede { margin-top: 16px; color: var(--muted); font-size: 1.05rem; }
.hero-ctas { margin-top: 26px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.hero-art {
    position: relative; width: 100%; max-width: 460px;
    display: flex; justify-content: center; align-items: flex-end; gap: 8px;
}
.hero-art img {
    width: 46%; border-radius: 24px;
    box-shadow: 0 24px 50px rgba(20, 20, 40, .14);
}
.hero-art img:first-child { transform: translateY(14px) rotate(-3deg); }
.hero-art img:last-child { transform: translateY(-6px) rotate(3deg); }

/* ---------------- STATS STRIP ---------------- */
.stats { padding: 8px 0 48px; }
.stats .wrap {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
    background: var(--surface); border-radius: var(--radius);
    padding: 22px 16px; box-shadow: 0 10px 30px rgba(20, 20, 40, .06);
}
.stat { text-align: center; }
.stat b { display: block; font-size: 1.4rem; font-weight: 800; color: var(--primary); }
.stat span { font-size: .78rem; color: var(--muted); font-weight: 600; }

/* ---------------- FEATURES ---------------- */
.section { padding: 48px 0; }
.section-head { text-align: center; max-width: 560px; margin: 0 auto 32px; }
.section-head h2 { font-size: 1.6rem; font-weight: 800; }
.section-head p { margin-top: 10px; color: var(--muted); }

.feature-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.feature-card {
    background: var(--surface); border-radius: var(--radius);
    padding: 22px; box-shadow: 0 8px 24px rgba(20, 20, 40, .05);
}
.feature-icon {
    width: 46px; height: 46px; border-radius: 14px;
    background: rgba(123, 97, 255, .12); color: var(--primary);
    display: grid; place-items: center; margin-bottom: 14px;
}
.feature-icon .material-symbols-rounded { font-size: 24px; }
.feature-card h3 { font-size: 1.02rem; font-weight: 700; margin-bottom: 6px; }
.feature-card p { color: var(--muted); font-size: .9rem; }

/* ---------------- FOR TEACHERS/STUDENTS ---------------- */
.audience-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.audience-card {
    background: var(--surface); border-radius: var(--radius);
    padding: 26px; box-shadow: 0 8px 24px rgba(20, 20, 40, .05);
    display: flex; flex-direction: column; gap: 14px; align-items: flex-start;
}
.audience-card img { width: 64px; height: 64px; }
.audience-card h3 { font-size: 1.15rem; font-weight: 800; }
.audience-card p { color: var(--muted); font-size: .92rem; }
.audience-card ul { margin: 4px 0 0; padding-left: 18px; color: var(--muted); font-size: .88rem; }
.audience-card li { margin-bottom: 4px; }

/* ---------------- CTA BAND ---------------- */
.cta-band {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 28px; color: #fff; text-align: center;
    padding: 42px 24px; margin: 0 20px 56px;
}
.cta-band h2 { font-size: 1.5rem; font-weight: 800; margin-bottom: 10px; }
.cta-band p { opacity: .92; margin-bottom: 22px; }
.cta-band .btn-ghost { background: #fff; color: var(--primary); border: none; }

/* ---------------- FOOTER ---------------- */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0 40px; }
.site-footer .wrap {
    display: flex; flex-direction: column; gap: 14px;
    align-items: center; text-align: center;
}
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; justify-content: center; font-size: .85rem; color: var(--muted); font-weight: 600; }
.footer-copy { font-size: .8rem; color: var(--muted); }

/* ================== DESKTOP / TABLET ================== */
@media (min-width: 860px) {
    .hero .wrap { flex-direction: row; text-align: left; align-items: center; gap: 56px; }
    .hero-copy { flex: 1; }
    .hero h1 { font-size: 2.9rem; }
    .hero p.lede { font-size: 1.15rem; }
    .hero-ctas { justify-content: flex-start; }
    .hero-art { flex: 1; max-width: none; }

    .feature-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .audience-grid { grid-template-columns: repeat(2, 1fr); gap: 22px; }
    .section-head h2 { font-size: 1.9rem; }
    .cta-band { margin: 0 auto 64px; max-width: 1080px; padding: 56px 40px; }
    .cta-band h2 { font-size: 1.9rem; }

    .site-footer .wrap { flex-direction: row; justify-content: space-between; text-align: left; }
}

/* ================== REDUCED MOTION ==================
   Mirrors the app shell (styles/global.css): users who ask the OS for
   less motion get an instant, static page — no smooth scrolling, no
   button/scale transitions. */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .btn { transition: none; }
    .btn:active { transform: none; }
}