/* ═══════════════════════════════════════════════
   Chatsey Care — Landing Page
   BTS Innovations LLC © 2026
   ═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
  --text: #1E1B2E;
  --text-secondary: #6B7280;
  --bg: #FFFFFF;
  --bg2: #F7F7FB;
  --bg-warm: #FDF8F4;
  --bg-cool: #F0F4FA;
  --bg-soft: #F7F7FB;
  --accent: #2563EB;
  --accent-light: #EFF6FF;
  --accent-mid: rgba(37,99,235,.15);
  --card: #FFFFFF;
  --border: #E5E7EB;
  --radius: 16px;
  --shadow: 0 2px 4px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06), 0 1px 0 rgba(255,255,255,.8) inset;
  --shadow-hover: 0 8px 32px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06), 0 1px 0 rgba(255,255,255,.8) inset;
  --transition: .25s cubic-bezier(.4,0,.2,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: 60px; display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(0,0,0,.06);
  transition: background .3s;
}
.nav-logo {
  font-size: 18px; font-weight: 700; color: var(--text); text-decoration: none;
  letter-spacing: -.01em;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a {
  font-size: 14px; font-weight: 500; color: var(--text-secondary);
  text-decoration: none; transition: color .2s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 8px 20px !important; background: var(--text); color: #fff !important;
  border-radius: 980px; font-weight: 600;
  transition: transform .2s, opacity .2s;
}
.nav-cta:hover { transform: translateY(-1px); opacity: .85; }
.mobile-menu { display: none; background: none; border: none; font-size: 22px; cursor: pointer; }

/* ── HERO ── */
.hero {
  position: relative;
  display: flex; align-items: flex-end; justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 0;
}
.hero img.hero-bg {
  width: 100%; height: auto; display: block;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg,
    rgba(10,8,30,.0) 0%,
    rgba(10,8,30,.05) 40%,
    rgba(10,8,30,.4) 72%,
    rgba(10,8,30,.65) 100%
  );
}
.hero-content {
  position: absolute; top: 55%; left: 0; right: 0; z-index: 2;
  max-width: 720px; margin: 0 auto; padding: 0 24px;
}
.hero h1 {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800; line-height: 1.08; letter-spacing: -.04em;
  color: #fff;
}
.hero-sub {
  font-size: 17px; line-height: 1.65; color: rgba(255,255,255,.8);
  max-width: 520px; margin: 24px auto 40px;
}
.hero-buttons { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
.app-store-badge img { transition: opacity .2s; }
.app-store-badge:hover img { opacity: .85; }

/* ── TRUST BAR ── */
.trust-bar-section { padding: 40px 24px; background: var(--bg); border-bottom: 1px solid var(--border); }
.trust-grid {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 28px;
  max-width: 800px; margin: 0 auto;
}
.trust-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 500; color: var(--text-secondary);
}
.trust-dot { width: 4px; height: 4px; border-radius: 50%; flex-shrink: 0; background: var(--text-secondary); opacity: .35; }

/* ── COMMON ── */
section { padding: 100px 24px; }
.inner { max-width: 1080px; margin: 0 auto; }
.eyebrow {
  font-size: 12px; font-weight: 700; color: var(--accent);
  letter-spacing: .1em; text-transform: uppercase; margin-bottom: 10px;
}
h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800; letter-spacing: -.03em; line-height: 1.15;
  margin-bottom: 12px;
}
.sub { font-size: 16px; color: var(--text-secondary); line-height: 1.6; max-width: 520px; }

/* ── SKILLS ── */
.features { background: var(--bg); }
.skill-categories {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px; margin-top: 48px;
}
.skill-cat {
  background: var(--bg-warm); border: none;
  border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow);
  opacity: 0; transform: translateY(16px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.skill-cat.visible { opacity: 1; transform: translateY(0); transition: opacity .4s, transform .4s; }
.skill-cat:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.skill-cat:nth-child(even) { background: var(--bg-cool); }
.skill-cat:nth-child(3n) { background: var(--bg-soft); }
.cat-header {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 16px; padding-bottom: 12px;
  border-bottom: 1px solid rgba(0,0,0,.06);
}
.cat-header h3 { flex: 1; font-size: 16px; font-weight: 700; }
.cat-count {
  background: var(--accent-mid); color: var(--accent);
  padding: 3px 10px; border-radius: 980px; font-size: 12px; font-weight: 700;
}
.skill-list { list-style: none; }
.skill-list li {
  padding: 7px 0; font-size: 14px; font-weight: 500; color: var(--text);
  padding-left: 4px;
}
.skill-list li + li { border-top: 1px solid rgba(0,0,0,.04); }
.skill-list li::before {
  content: ''; display: inline-block;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); margin-right: 12px; vertical-align: middle;
  opacity: .4;
}

/* ── ACADEMY ── */
.academy { background: var(--bg-warm); }
.course-categories {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px; margin-top: 48px;
}
.course-cat {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  box-shadow: var(--shadow);
  opacity: 0; transform: translateY(16px);
  transition: transform var(--transition);
}
.course-cat.visible { opacity: 1; transform: translateY(0); transition: opacity .4s, transform .4s; }
.course-cat:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.course-cat h4 {
  font-size: 15px; font-weight: 700; margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.cc-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.cc-count {
  margin-left: auto; background: var(--accent-mid); color: var(--accent);
  padding: 2px 8px; border-radius: 980px; font-size: 11px; font-weight: 700;
}
.course-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.course-chips span {
  padding: 6px 14px; background: var(--bg-warm); border-radius: 980px;
  font-size: 12px; font-weight: 500; color: var(--text);
  border: 1px solid rgba(0,0,0,.06); transition: background .2s;
}
.course-chips span:hover { background: var(--accent-light); }

/* ── DEVICES ── */
.devices { background: var(--bg-cool); }
.device-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-top: 48px;
}
.device-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 20px; text-align: center;
  box-shadow: var(--shadow);
  opacity: 0; transform: translateY(16px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.device-card.visible { opacity: 1; transform: translateY(0); transition: opacity .4s, transform .4s; }
.device-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.device-icon-wrap {
  width: 48px; height: 48px; margin: 0 auto 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-light); border-radius: 12px; color: var(--accent);
}
.device-svg { width: 22px; height: 22px; }
.device-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.device-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }

/* ── FRAMEWORKS ── */
.frameworks {
  background: var(--bg-soft); color: var(--text);
  padding: 80px 24px;
}
.frameworks .eyebrow { color: var(--accent); }
.frameworks h2 { color: var(--text); }
.fw-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px; margin-top: 40px;
}
.fw-group {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  box-shadow: var(--shadow);
  opacity: 0; transform: translateY(16px);
}
.fw-group.visible { opacity: 1; transform: translateY(0); transition: opacity .4s, transform .4s; }
.fw-group h4 { font-size: 14px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.fw-chips { display: flex; flex-wrap: wrap; gap: 0; }
.fw-chips span {
  font-size: 12px; font-weight: 500; color: var(--text-secondary);
  padding: 0;
}
.fw-chips span::after { content: ' · '; color: rgba(0,0,0,.15); }
.fw-chips span:last-child::after { content: ''; }

/* ── AI SECTION ── */
.ai-section { background: var(--bg); }
.ai-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; margin-top: 48px;
}
.ai-card {
  background: var(--bg-cool); border: none;
  border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow);
  opacity: 0; transform: translateY(16px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.ai-card.visible { opacity: 1; transform: translateY(0); transition: opacity .4s, transform .4s; }
.ai-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.ai-card:nth-child(even) { background: var(--bg-warm); }
.ai-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.ai-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.55; }

/* ── CREATE YOUR COMPANION ── */
.companion-create {
  background: linear-gradient(160deg, #F0E6FF 0%, #E8F4FD 50%, #FDF2F0 100%);
  text-align: center;
}
.companion-steps {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 20px; margin-top: 48px;
}
.companion-step {
  background: var(--card);
  border-radius: var(--radius); padding: 32px 20px;
  box-shadow: var(--shadow);
  position: relative;
  opacity: 0; transform: translateY(16px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.companion-step.visible { opacity: 1; transform: translateY(0); transition: opacity .4s, transform .4s; }
.companion-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.step-number {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #8B5CF6);
  color: #fff; font-size: 13px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.step-icon { font-size: 40px; margin-bottom: 14px; }
.companion-step h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.companion-step p { font-size: 13px; color: var(--text-secondary); line-height: 1.55; text-align: center; }

/* ── SAFETY ── */
.safety { background: var(--bg-warm); }
.safety-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-top: 48px;
}
.safety-item {
  background: var(--card); border: none;
  border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow);
  opacity: 0; transform: translateY(16px);
  transition: transform var(--transition);
  position: relative; overflow: hidden;
}
.safety-item::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), #60A5FA);
}
.safety-item.visible { opacity: 1; transform: translateY(0); transition: opacity .4s, transform .4s; }
.safety-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.safety-item p { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }

/* ── BONUS ── */
.bonus { background: var(--bg); }
.bonus-grid {
  columns: 3; column-gap: 16px; margin-top: 48px;
}
.bonus-item {
  background: var(--bg-soft); border: none;
  border-radius: 14px; padding: 16px 18px; margin-bottom: 14px;
  break-inside: avoid;
  font-size: 13px; line-height: 1.55; color: var(--text);
  opacity: 0; transform: translateY(8px);
  box-shadow: 0 1px 4px rgba(0,0,0,.03);
}
.bonus-item.visible { opacity: 1; transform: translateY(0); transition: opacity .3s, transform .3s; }
.bonus-item strong { font-weight: 700; }

/* ── PRICING ── */
.pricing { background: var(--bg-cool); }
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px; align-items: start;
}
.price-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px 28px; text-align: center;
  box-shadow: var(--shadow);
  opacity: 0; transform: translateY(16px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.price-card.visible { opacity: 1; transform: translateY(0); transition: opacity .4s, transform .4s; }
.price-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.price-card.featured {
  border: 2px solid var(--accent);
  box-shadow: 0 8px 40px rgba(37,99,235,.12);
  transform: scale(1.03);
}
.price-card.featured.visible { transform: scale(1.03); }
.price-card.featured:hover { transform: scale(1.03) translateY(-3px); }
.price-tag {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--accent); margin-bottom: 6px;
}
.price-card h4 { font-size: 20px; font-weight: 800; margin-bottom: 4px; }
.price-amount {
  font-size: 36px; font-weight: 900; letter-spacing: -.03em; margin-bottom: 20px;
}
.price-amount span { font-size: 14px; font-weight: 500; color: var(--text-secondary); }
.price-features { list-style: none; text-align: left; margin-bottom: 24px; }
.price-features li {
  padding: 7px 0; font-size: 13px; font-weight: 500;
  padding-left: 4px;
}
.price-features li + li { border-top: 1px solid rgba(0,0,0,.04); }
.price-features li::before {
  content: ''; display: inline-block;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); margin-right: 10px; vertical-align: middle;
  opacity: .4;
}
.btn-outline {
  padding: 12px 28px; background: var(--bg-cool); color: var(--text);
  border-radius: 980px; font-size: 14px; font-weight: 600;
  text-decoration: none; display: inline-block;
  border: 1px solid var(--border); transition: all .2s;
}
.btn-outline:hover { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }
.btn-fill {
  padding: 12px 28px; background: var(--accent); color: #fff;
  border-radius: 980px; font-size: 14px; font-weight: 600;
  text-decoration: none; display: inline-block;
  border: none; cursor: pointer; transition: all .2s;
}
.btn-fill:hover { opacity: .9; transform: translateY(-1px); }

/* Compare */
.compare-box {
  margin-top: 56px; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px; overflow-x: auto;
  box-shadow: var(--shadow);
}
.compare-box h4 { font-size: 18px; font-weight: 800; margin-bottom: 16px; text-align: center; }
.compare-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.compare-table th {
  padding: 10px 14px; font-weight: 700; text-align: center;
  border-bottom: 2px solid var(--border); font-size: 14px;
}
.compare-table th:first-child { text-align: left; }
.compare-table td {
  padding: 10px 14px; text-align: center;
  border-bottom: 1px solid rgba(0,0,0,.04);
}
.compare-table td:first-child { text-align: left; font-weight: 600; }
.compare-table .highlight { color: var(--accent); font-weight: 700; }

/* ── CTA ── */
.cta {
  text-align: center; padding: 100px 24px;
  background: linear-gradient(160deg, var(--bg-cool) 0%, var(--bg-warm) 100%);
  color: var(--text);
}
.cta h2 { color: var(--text); font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
.cta-note { font-size: 12px; color: var(--text-secondary); margin-top: 28px; line-height: 1.6; }

/* ── FOOTER ── */
footer { background: #FAFAFA; color: var(--text-secondary); padding: 56px 24px 28px; border-top: 1px solid var(--border); }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px; max-width: 1080px; margin: 0 auto;
}
.footer-logo { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.footer-sub { font-size: 12px; line-height: 1.6; }
footer h5 {
  font-size: 11px; font-weight: 700; color: rgba(0,0,0,.3);
  text-transform: uppercase; letter-spacing: .08em; margin-bottom: 10px;
}
footer a {
  display: block; font-size: 13px; color: var(--text-secondary);
  text-decoration: none; margin-bottom: 6px; transition: color .2s;
}
footer a:hover { color: var(--text); }
.footer-bottom {
  text-align: center; font-size: 11px; color: rgba(0,0,0,.25);
  margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border);
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .device-grid, .safety-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid, .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .companion-steps { grid-template-columns: repeat(2, 1fr); }
  .bonus-grid { columns: 2; }
}

@media (max-width: 768px) {
  nav { padding: 0 20px; }
  .nav-links {
    display: none; position: fixed; top: 60px; left: 0; right: 0;
    background: #fff; padding: 20px; flex-direction: column; gap: 14px;
    box-shadow: 0 8px 24px rgba(0,0,0,.08);
  }
  .nav-links.open { display: flex; }
  .mobile-menu { display: block; }
  .hero h1 { font-size: 2.2rem; }
  .skill-categories, .course-categories, .device-grid, .ai-grid,
  .safety-grid, .fw-grid, .pricing-grid, .companion-steps { grid-template-columns: 1fr; }
  .bonus-grid { columns: 1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  section { padding: 64px 20px; }
}