/* ==========================================================================
   AideLearn – Official Website Stylesheet
   Company name is a PLACEHOLDER: search for "AideLearn Technology Ltd."
   and replace it with your real company name everywhere.
   ========================================================================== */

:root {
  --primary: #2f6bff;
  --primary-dark: #1e4fd0;
  --accent: #ffb020;
  --ink: #1c2434;
  --muted: #5a6474;
  --bg: #ffffff;
  --bg-soft: #f4f7ff;
  --border: #e3e9f4;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(28, 36, 52, 0.08);
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: min(1100px, 92%); margin: 0 auto; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }

.brand .logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), #6ea4ff);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 1.05rem;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
  text-decoration: none;
}

.nav-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 9px 20px;
  border-radius: 999px;
  font-weight: 600;
  transition: background 0.2s;
}
.nav-cta:hover { background: var(--primary-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--ink);
}

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(47, 107, 255, 0.12), transparent 60%),
    radial-gradient(700px 400px at 0% 110%, rgba(255, 176, 32, 0.14), transparent 60%),
    var(--bg-soft);
  padding: 96px 0 90px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4.2vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.hero h1 .highlight { color: var(--primary); }

.hero p.lead {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 34em;
  margin-bottom: 30px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  transition: transform 0.15s, background 0.2s, box-shadow 0.2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }

.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(47, 107, 255, 0.28); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { border: 1.5px solid var(--border); color: var(--ink); background: #fff; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

/* Hero art (pure CSS illustration) */
.hero-art {
  position: relative;
  aspect-ratio: 1;
  max-width: 420px;
  margin: 0 auto;
}

.blob {
  position: absolute;
  border-radius: 32% 68% 55% 45% / 48% 35% 65% 52%;
  background: linear-gradient(135deg, var(--primary), #7db0ff);
  opacity: 0.12;
  inset: 0;
  animation: float 7s ease-in-out infinite;
}

.card-float {
  position: absolute;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 20px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: float 6s ease-in-out infinite;
}

.card-float .emoji { font-size: 1.6rem; }
.card-float small { display: block; font-weight: 400; color: var(--muted); font-size: 0.8rem; }

.card-a { top: 8%; left: 2%; animation-delay: 0.4s; }
.card-b { top: 40%; right: -4%; animation-delay: 1.2s; }
.card-c { bottom: 4%; left: 12%; animation-delay: 2s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* ---------- Sections ---------- */
.section { padding: 84px 0; }
.section.soft { background: var(--bg-soft); }

.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -0.01em; margin-bottom: 12px; }
.section-head p { color: var(--muted); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }

.feature {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

.feature .icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  background: var(--bg-soft);
  margin-bottom: 16px;
}

.feature h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature p { color: var(--muted); font-size: 0.95rem; }

/* ---------- App showcase ---------- */
.app-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.app-showcase h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: 14px; }
.app-showcase p { color: var(--muted); margin-bottom: 18px; }

.checklist { list-style: none; margin-bottom: 26px; }
.checklist li {
  padding-left: 30px;
  position: relative;
  color: var(--muted);
  margin-bottom: 10px;
  font-size: 0.98rem;
}
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(47, 107, 255, 0.12);
  color: var(--primary);
  font-size: 0.75rem;
  display: grid;
  place-items: center;
  top: 4px;
}

.phone-mock {
  width: min(270px, 100%);
  margin: 0 auto;
  border-radius: 40px;
  border: 10px solid var(--ink);
  background: linear-gradient(180deg, #eaf1ff, #ffffff);
  box-shadow: var(--shadow);
  padding: 26px 20px 30px;
  text-align: center;
}
.phone-mock .screen-icon { font-size: 3rem; margin-bottom: 12px; }
.phone-mock h4 { margin-bottom: 6px; }
.phone-mock p { font-size: 0.85rem; color: var(--muted); }
.phone-mock .app-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 18px;
}
.phone-mock .app-tile {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 6px;
  font-size: 0.72rem;
  font-weight: 600;
}
.phone-mock .app-tile span { display: block; font-size: 1.3rem; margin-bottom: 6px; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 22px;
  padding: 52px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 { font-size: 1.6rem; margin-bottom: 8px; }
.cta-band p { opacity: 0.85; }
.cta-band .btn { background: #fff; color: var(--primary); }

/* ---------- Legal / content pages ---------- */
.page-head {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  padding: 56px 0;
  margin-bottom: 56px;
}
.page-head h1 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); margin-bottom: 8px; }
.page-head p { color: var(--muted); }

.legal h2 { font-size: 1.15rem; margin: 34px 0 10px; }
.legal p, .legal li { color: var(--muted); font-size: 0.96rem; }
.legal ul { padding-left: 22px; margin-bottom: 12px; }
.legal .updated { font-size: 0.85rem; color: #98a2b3; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }

.info-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  gap: 16px;
  margin-bottom: 18px;
}
.info-card .icon { font-size: 1.4rem; }
.info-card h3 { font-size: 1rem; margin-bottom: 4px; }
.info-card p { color: var(--muted); font-size: 0.92rem; }

.contact-form label { display: block; font-weight: 600; font-size: 0.88rem; margin: 16px 0 6px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.15s;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
}
.contact-form .btn { margin-top: 22px; border: none; cursor: pointer; font-family: inherit; }

.form-note { font-size: 0.85rem; color: #98a2b3; margin-top: 12px; }

/* ---------- Footer ---------- */
.site-footer {
  background: #101521;
  color: #aab3c5;
  padding: 60px 0 28px;
  margin-top: 84px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.site-footer .brand { color: #fff; }
.site-footer .brand .logo-mark { background: linear-gradient(135deg, var(--primary), #6ea4ff); }

.site-footer p { font-size: 0.9rem; max-width: 34em; }
.site-footer h4 { color: #fff; font-size: 0.95rem; margin-bottom: 14px; }
.site-footer ul { list-style: none; }
.site-footer ul a { color: #aab3c5; font-size: 0.9rem; }
.site-footer ul a:hover { color: #fff; text-decoration: none; }

.footer-bottom {
  border-top: 1px solid #232b3c;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: #77839a;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-inner, .app-showcase, .contact-grid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero { padding: 64px 0; }
  .hero-art { display: none; }
}

@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }

  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 4vw 18px;
    display: none;
    box-shadow: 0 12px 24px rgba(28, 36, 52, 0.08);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; border-bottom: 1px dashed var(--border); }
  .nav-links li:last-child a { border-bottom: none; }

  .cta-band { padding: 36px 26px; }
  .section { padding: 60px 0; }
}