/* EduSpark — Purple gradient + glassmorphism EdTech */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --purple-start: #6366f1;
  --purple-end: #8b5cf6;
  --purple-dark: #4f46e5;
  --text: #1e1b4b;
  --text-muted: #64748b;
  --glass-bg: rgba(255, 255, 255, 0.18);
  --glass-border: rgba(255, 255, 255, 0.35);
  --white: #ffffff;
  --surface: #f8fafc;
  --radius: 16px;
  --shadow: 0 8px 32px rgba(99, 102, 241, 0.15);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max: 1180px;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  line-height: 1.65;
  background: var(--surface);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--purple-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

.skip-link {
  position: absolute; top: -100px; left: 1rem; z-index: 9999;
  background: var(--purple-dark); color: #fff; padding: .75rem 1rem; border-radius: 8px;
}
.skip-link:focus { top: 1rem; }

/* Header */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(99,102,241,.1);
  transition: box-shadow .25s;
}
.header.is-scrolled { box-shadow: 0 4px 24px rgba(99,102,241,.12); }
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 1rem;
}
.logo {
  display: flex; align-items: center; gap: .6rem;
  font-weight: 700; font-size: 1.15rem; color: var(--text); text-decoration: none;
}
.logo__icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--purple-start), var(--purple-end));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: .75rem; font-weight: 800;
}
.nav__list { display: flex; gap: 1.5rem; list-style: none; }
.nav__link { color: var(--text-muted); font-size: .925rem; font-weight: 500; text-decoration: none; }
.nav__link:hover { color: var(--purple-dark); text-decoration: none; }
.header__actions { display: flex; align-items: center; gap: .75rem; }
.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: .5rem;
}
.menu-toggle__bar { width: 24px; height: 2px; background: var(--text); border-radius: 2px; }
.mobile-nav {
  display: none; position: fixed; inset: 72px 0 0; background: #fff;
  padding: 1.5rem; overflow-y: auto; z-index: 99;
}
.mobile-nav.is-open { display: block; }
.mobile-nav__list { list-style: none; }
.mobile-nav__link {
  display: block; padding: .85rem 0; font-size: 1.05rem;
  color: var(--text); border-bottom: 1px solid #e2e8f0; text-decoration: none;
}
.mobile-nav__actions { margin-top: 1.5rem; display: flex; flex-direction: column; gap: .75rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .65rem 1.25rem; border-radius: 10px; font-weight: 600;
  font-size: .925rem; border: 2px solid transparent; cursor: pointer;
  text-decoration: none; transition: transform .15s, box-shadow .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--primary {
  background: linear-gradient(135deg, var(--purple-start), var(--purple-end));
  color: #fff; box-shadow: 0 4px 16px rgba(99,102,241,.35);
}
.btn--outline {
  background: transparent; border-color: rgba(99,102,241,.4); color: var(--purple-dark);
}
.btn--lg { padding: .85rem 1.75rem; font-size: 1rem; }
.btn--glass {
  background: var(--glass-bg); border-color: var(--glass-border);
  color: #fff; backdrop-filter: blur(8px);
}

/* Hero split-screen */
.hero {
  padding: 120px 0 80px;
  background: linear-gradient(135deg, var(--purple-start) 0%, var(--purple-end) 55%, #a78bfa 100%);
  color: #fff; overflow: hidden; position: relative;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,.12) 0%, transparent 50%);
  pointer-events: none;
}
.hero__grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem;
  align-items: center; position: relative;
}
.hero__badge {
  display: inline-block; padding: .4rem 1rem; border-radius: 999px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px); font-size: .85rem; margin-bottom: 1.25rem;
}
.hero h1 { font-size: clamp(1.85rem, 4vw, 2.75rem); line-height: 1.2; margin-bottom: 1rem; font-weight: 800; }
.hero__subtitle { font-size: 1.05rem; opacity: .92; margin-bottom: 1.75rem; max-width: 520px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 2rem; }
.hero__trust { display: flex; flex-wrap: wrap; gap: 1.25rem; }
.hero__trust-item {
  display: flex; align-items: center; gap: .5rem; font-size: .875rem; opacity: .9;
}
.hero__trust-icon { width: 18px; height: 18px; flex-shrink: 0; }
.hero__visual { position: relative; }
.hero__figure { border-radius: var(--radius); overflow: hidden; box-shadow: 0 24px 64px rgba(0,0,0,.25); }
.hero__caption { font-size: .75rem; opacity: .75; margin-top: .5rem; text-align: center; }

/* Floating glass cards on hero */
.hero__floats { position: absolute; inset: 0; pointer-events: none; }
.float-card {
  position: absolute; padding: .85rem 1.1rem; border-radius: 12px;
  background: rgba(255,255,255,.22); border: 1px solid rgba(255,255,255,.4);
  backdrop-filter: blur(14px); font-size: .8rem; box-shadow: var(--shadow);
  animation: float 4s ease-in-out infinite;
}
.float-card--1 { top: 10%; right: -5%; animation-delay: 0s; }
.float-card--2 { bottom: 20%; left: -8%; animation-delay: 1s; }
.float-card--3 { top: 45%; right: 5%; animation-delay: 2s; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* Sections */
.section { padding: 5rem 0; }
.section--alt { background: #fff; }
.section__header { text-align: center; max-width: 680px; margin: 0 auto 3rem; }
.section__label {
  display: inline-block; font-size: .75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .12em; color: var(--purple-start); margin-bottom: .75rem;
}
.section__header h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: .75rem; }
.section__desc { color: var(--text-muted); }

/* Trust */
.trust__grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 2.5rem; align-items: start; }
.trust__stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.trust__stat {
  padding: 1.25rem; border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(99,102,241,.08), rgba(139,92,246,.06));
  border: 1px solid rgba(99,102,241,.12); text-align: center;
}
.trust__stat-value { font-size: 1.75rem; font-weight: 800; color: var(--purple-dark); }
.trust__stat-label { font-size: .85rem; color: var(--text-muted); margin-top: .25rem; }
.trust__placeholder { font-size: .7rem; color: #94a3b8; margin-top: .35rem; }
.usecase-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.usecase-card { border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow); }
.usecase-card img { aspect-ratio: 3/2; object-fit: cover; width: 100%; }
.usecase-card figcaption { padding: .65rem .85rem; font-size: .85rem; font-weight: 600; }
.trust__reviews { display: flex; flex-direction: column; gap: 1rem; }
.trust__review {
  padding: 1.25rem; border-radius: var(--radius);
  background: rgba(255,255,255,.7); border: 1px solid rgba(99,102,241,.1);
  backdrop-filter: blur(8px);
}
.trust__review-text { font-style: italic; margin-bottom: .5rem; }
.trust__review-meta { font-size: .8rem; color: var(--text-muted); }

/* Features — glass cards floating grid */
.features__grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.5rem;
}
.feature-card {
  padding: 1.75rem; border-radius: var(--radius);
  background: rgba(255,255,255,.65); border: 1px solid rgba(99,102,241,.15);
  backdrop-filter: blur(12px); box-shadow: var(--shadow);
  transition: transform .2s, box-shadow .2s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(99,102,241,.2); }
.feature-card__icon { font-size: 1.75rem; margin-bottom: .75rem; }
.feature-card__title { font-size: 1.05rem; margin-bottom: .5rem; font-weight: 700; }
.feature-card__desc { font-size: .9rem; color: var(--text-muted); }

/* Steps */
.steps { display: flex; flex-direction: column; gap: 1.5rem; max-width: 720px; margin: 0 auto; }
.step {
  display: flex; gap: 1.25rem; padding: 1.5rem; border-radius: var(--radius);
  background: #fff; border: 1px solid rgba(99,102,241,.12); box-shadow: var(--shadow);
}
.step__number {
  width: 44px; height: 44px; border-radius: 12px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--purple-start), var(--purple-end));
  color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800;
}
.step__title { font-size: 1.05rem; margin-bottom: .35rem; }
.step__desc { font-size: .9rem; color: var(--text-muted); }

/* Benefits */
.benefits__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.benefit-item {
  display: flex; gap: 1rem; padding: 1.25rem; border-radius: var(--radius);
  background: #fff; border: 1px solid #e2e8f0;
}
.benefit-item__check { width: 24px; height: 24px; color: var(--purple-start); flex-shrink: 0; margin-top: .15rem; }
.benefit-item__title { font-size: 1rem; margin-bottom: .35rem; }
.benefit-item__desc { font-size: .875rem; color: var(--text-muted); }

/* Comparison */
.comparison-table-wrapper { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); }
.comparison-table { width: 100%; border-collapse: collapse; background: #fff; font-size: .925rem; }
.comparison-table th, .comparison-table td { padding: 1rem 1.25rem; text-align: left; border-bottom: 1px solid #e2e8f0; }
.comparison-table th { background: linear-gradient(135deg, var(--purple-start), var(--purple-end)); color: #fff; }
.comparison-table .col-highlight { background: rgba(99,102,241,.06); font-weight: 600; }
.comparison-note { font-size: .8rem; color: var(--text-muted); margin-top: 1rem; }

/* FAQ */
.faq__list { max-width: 760px; margin: 0 auto; }
.faq__item { border-bottom: 1px solid #e2e8f0; }
.faq__question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 1.15rem 0; background: none; border: none; cursor: pointer;
  font-size: 1rem; font-weight: 600; text-align: left; color: var(--text); gap: 1rem;
}
.faq__icon { width: 20px; height: 20px; flex-shrink: 0; transition: transform .25s; color: var(--purple-start); }
.faq__item.is-open .faq__icon { transform: rotate(180deg); }
.faq__answer { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq__item.is-open .faq__answer { max-height: 600px; }
.faq__answer p { padding-bottom: 1.15rem; color: var(--text-muted); font-size: .925rem; }

/* About */
.about__grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 2.5rem; align-items: start; }
.about__figure { border-radius: var(--radius); overflow: hidden; margin-bottom: 1.25rem; box-shadow: var(--shadow); }
.about__caption { font-size: .8rem; color: var(--text-muted); margin-top: .5rem; }
.about__content p { margin-bottom: 1rem; color: var(--text-muted); }
.about__values { display: flex; flex-direction: column; gap: 1rem; }
.about__value {
  padding: 1.25rem; border-radius: var(--radius);
  background: rgba(99,102,241,.06); border: 1px solid rgba(99,102,241,.12);
}
.about__value h3 { font-size: 1rem; margin-bottom: .35rem; color: var(--purple-dark); }

/* CTA */
.cta-banner {
  padding: 4rem 0; text-align: center;
  background: linear-gradient(135deg, var(--purple-start), var(--purple-end)); color: #fff;
}
.cta-banner h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: .75rem; }
.cta-banner__desc { opacity: .9; margin-bottom: 1.5rem; max-width: 560px; margin-left: auto; margin-right: auto; }

/* Contact */
.contact__grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 2.5rem; }
.contact__item { margin-bottom: 1.5rem; }
.contact__item h3 { font-size: .95rem; margin-bottom: .35rem; color: var(--purple-dark); }
.contact-form {
  padding: 2rem; border-radius: var(--radius);
  background: rgba(255,255,255,.8); border: 1px solid rgba(99,102,241,.15);
  backdrop-filter: blur(10px); box-shadow: var(--shadow);
}
.form-group { margin-bottom: 1.15rem; }
.form-group label { display: block; font-size: .875rem; font-weight: 600; margin-bottom: .4rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: .75rem 1rem; border: 1px solid #cbd5e1;
  border-radius: 10px; font-family: inherit; font-size: .925rem;
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: .8rem; color: var(--text-muted); margin-bottom: 1rem; }
.form-success {
  display: none; padding: 1rem; border-radius: 10px; margin-bottom: 1rem;
  background: rgba(99,102,241,.1); border: 1px solid rgba(99,102,241,.25); color: var(--purple-dark);
}
.form-success.is-visible { display: block; }

/* Footer */
.footer { background: #1e1b4b; color: rgba(255,255,255,.8); padding: 3.5rem 0 2rem; }
.footer .logo { color: #fff; }
.footer__grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 2.5rem; }
.footer__brand p { font-size: .875rem; margin-top: .75rem; opacity: .75; }
.footer__col h4 { color: #fff; font-size: .9rem; margin-bottom: .85rem; }
.footer__links { list-style: none; }
.footer__links li { margin-bottom: .5rem; }
.footer__links a { color: rgba(255,255,255,.7); font-size: .875rem; text-decoration: none; }
.footer__links a:hover { color: #fff; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 1.5rem; }
.footer__bottom p { font-size: .8rem; opacity: .7; margin-bottom: .5rem; }
.footer__legal { font-size: .75rem; opacity: .6; line-height: 1.6; }

/* Legal pages */
.legal-page { padding: 120px 0 4rem; max-width: 760px; margin: 0 auto; }
.legal-page h1 { font-size: 2rem; margin-bottom: .5rem; }
.legal-updated { color: var(--text-muted); font-size: .875rem; margin-bottom: 2rem; }
.legal-page h2 { font-size: 1.2rem; margin: 2rem 0 .75rem; color: var(--purple-dark); }
.legal-page p, .legal-page li { color: var(--text-muted); margin-bottom: .75rem; }
.legal-page ul { padding-left: 1.25rem; }

@media (max-width: 960px) {
  .nav { display: none; }
  .menu-toggle { display: flex; }
  .hero__grid, .trust__grid, .about__grid, .contact__grid, .benefits__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .float-card { display: none; }
}
@media (max-width: 600px) {
  .trust__stats, .usecase-gallery { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .header__actions .btn--outline { display: none; }
}