/* Tech Buddy — senior-friendly design system
   Large type, high contrast, big tap targets, calm colors. */

:root {
  --blue: #1E40AF;
  --blue-dark: #1E3A8A;
  --blue-light: #DBEAFE;
  --amber: #F59E0B;
  --amber-dark: #D97706;
  --green: #059669;
  --ink: #111827;
  --gray-700: #374151;
  --gray-500: #6B7280;
  --gray-200: #E5E7EB;
  --gray-100: #F3F4F6;
  --bg: #FFFFFF;
  --bg-soft: #FAFBFC;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(17,24,39,.06), 0 1px 3px rgba(17,24,39,.08);
  --shadow-md: 0 4px 12px rgba(17,24,39,.08), 0 2px 4px rgba(17,24,39,.06);
  --shadow-lg: 0 18px 40px rgba(17,24,39,.12);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 19px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--blue-dark); }

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Top bar / phone strip ---------- */
.topbar {
  background: var(--blue);
  color: #fff;
  font-weight: 600;
  text-align: center;
  padding: 10px 16px;
  font-size: 16px;
}
.topbar a { color: #fff; text-decoration: none; }
.topbar .phone { font-size: 18px; }

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.96);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--gray-200);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 22px; color: var(--ink);
  text-decoration: none;
}
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  display: grid; place-items: center; color: #fff; font-weight: 800;
  box-shadow: var(--shadow-sm);
}
.nav-links {
  display: flex; gap: 22px; align-items: center;
}
.nav-links a {
  color: var(--gray-700); text-decoration: none; font-weight: 600; font-size: 17px;
}
.nav-links a:hover { color: var(--blue); }
.nav-cta { margin-left: 10px; }

.menu-toggle {
  display: none;
  background: none; border: 2px solid var(--gray-200);
  border-radius: 10px; padding: 8px 12px; cursor: pointer;
  font-size: 18px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 16px 26px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .08s ease, box-shadow .15s ease, background .15s ease;
  line-height: 1;
}
.btn-primary {
  background: var(--blue); color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { background: var(--blue-dark); color:#fff; }
.btn-amber {
  background: var(--amber); color: #1F2937;
  box-shadow: var(--shadow-md);
}
.btn-amber:hover { background: var(--amber-dark); color:#fff; }
.btn-outline {
  background: #fff; color: var(--blue); border-color: var(--blue);
}
.btn-outline:hover { background: var(--blue-light); }
.btn-lg { padding: 20px 30px; font-size: 20px; }
.btn-block { display:block; width: 100%; text-align:center; }
.btn:active { transform: translateY(1px); }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1200px 500px at 80% -10%, var(--blue-light), transparent 60%),
    linear-gradient(180deg, #fff 0%, var(--bg-soft) 100%);
  padding: 64px 0 80px;
}
.hero-grid {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center;
}
.eyebrow {
  display: inline-block;
  background: var(--blue-light); color: var(--blue-dark);
  padding: 8px 14px; border-radius: 999px; font-weight: 700; font-size: 14px;
  letter-spacing: .04em; text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(38px, 5.2vw, 60px);
  line-height: 1.05; margin: 18px 0 18px; letter-spacing: -.01em;
}
.hero h1 .accent { color: var(--blue); }
.hero p.lead {
  font-size: 22px; color: var(--gray-700); margin: 0 0 28px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-trust {
  margin-top: 26px; display: flex; gap: 22px; flex-wrap: wrap;
  color: var(--gray-700); font-weight: 600;
}
.hero-trust span::before { content: "✓ "; color: var(--green); font-weight: 800; }

.hero-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 28px; box-shadow: var(--shadow-lg);
}
.hero-card h3 { margin: 0 0 6px; font-size: 22px; }
.hero-card .price-row {
  display:flex; justify-content:space-between; padding: 14px 0;
  border-bottom: 1px dashed var(--gray-200); font-size: 18px;
}
.hero-card .price-row:last-of-type { border-bottom: none; }
.hero-card .price { font-weight: 800; color: var(--blue); }
.hero-card .note { color: var(--gray-500); font-size: 15px; margin-top: 10px; }

/* ---------- Section ---------- */
section { padding: 72px 0; }
section.alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 44px; }
.section-head h2 {
  font-size: clamp(30px, 3.6vw, 42px); margin: 0 0 12px; letter-spacing: -.01em;
}
.section-head p { color: var(--gray-700); font-size: 19px; margin: 0; }

/* ---------- Problem strip ---------- */
.problem {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.problem-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm);
}
.problem-card .num {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--blue-light); color: var(--blue-dark);
  display: grid; place-items: center; font-weight: 800; margin-bottom: 10px;
}
.problem-card h3 { margin: 0 0 6px; font-size: 19px; }
.problem-card p { margin: 0; color: var(--gray-700); }

/* ---------- Services grid ---------- */
.services {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.svc {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 22px; transition: transform .12s ease, box-shadow .12s ease, border-color .12s;
}
.svc:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--blue-light); }
.svc-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--blue-light); color: var(--blue-dark);
  display: grid; place-items: center; font-size: 24px; margin-bottom: 12px;
}
.svc h3 { margin: 0 0 6px; font-size: 19px; }
.svc p { margin: 0; color: var(--gray-700); font-size: 17px; }

/* ---------- Pricing ---------- */
.pricing {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.plan {
  background: #fff; border: 2px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 30px; text-align: left; position: relative;
  display: flex; flex-direction: column;
}
.plan h3 { margin: 0 0 8px; font-size: 24px; }
.plan .price {
  font-size: 46px; font-weight: 800; color: var(--ink); margin: 6px 0 4px;
}
.plan .price small { font-size: 18px; color: var(--gray-500); font-weight: 600; }
.plan .blurb { color: var(--gray-700); margin: 0 0 18px; }
.plan ul { list-style: none; padding: 0; margin: 0 0 24px; }
.plan li { padding: 8px 0; padding-left: 28px; position: relative; }
.plan li::before {
  content: "✓"; position: absolute; left: 0; top: 8px;
  color: var(--green); font-weight: 800;
}
.plan .btn { margin-top: auto; }
.plan.featured {
  border-color: var(--blue);
  box-shadow: 0 20px 50px rgba(30,64,175,.18);
  transform: translateY(-6px);
}
.plan.featured .ribbon {
  position: absolute; top: -14px; right: 24px;
  background: var(--amber); color: #1F2937;
  padding: 6px 12px; border-radius: 999px; font-weight: 800; font-size: 14px;
  letter-spacing: .04em; text-transform: uppercase;
}

/* ---------- Testimonials ---------- */
.testimonials { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.quote {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm);
}
.stars { color: var(--amber); font-size: 20px; letter-spacing: 2px; margin-bottom: 10px; }
.quote p { font-size: 18px; line-height: 1.55; margin: 0 0 14px; }
.quote .who { color: var(--gray-700); font-weight: 700; }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: #fff; border-radius: var(--radius-lg); padding: 48px;
  display: grid; grid-template-columns: 1.4fr auto; gap: 28px; align-items: center;
}
.cta-banner h2 { margin: 0 0 8px; font-size: 32px; color: #fff; }
.cta-banner p { margin: 0; font-size: 19px; color: #DBEAFE; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }
details.faq {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 18px 22px; margin-bottom: 12px;
}
details.faq summary {
  font-weight: 700; font-size: 19px; cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+"; font-size: 26px; color: var(--blue); font-weight: 800;
  transition: transform .2s ease;
}
details.faq[open] summary::after { content: "−"; }
details.faq .a {
  margin-top: 12px; color: var(--gray-700); font-size: 18px;
}

/* ---------- Forms ---------- */
.form {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow-md); max-width: 720px; margin: 0 auto;
}
.field { margin-bottom: 18px; }
.field label {
  display: block; font-weight: 700; margin-bottom: 6px; font-size: 17px;
}
.field input, .field select, .field textarea {
  width: 100%; padding: 14px 16px; font-size: 18px; font-family: inherit;
  border: 2px solid var(--gray-200); border-radius: 12px; background: #fff;
  transition: border-color .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue);
}
.field .help { color: var(--gray-500); font-size: 15px; margin-top: 4px; }
.field.row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field.row > div { margin: 0; }
.checkbox {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 12px; border: 2px solid var(--gray-200); border-radius: 12px;
  cursor: pointer;
}
.checkbox input { width: 22px; height: 22px; margin-top: 2px; flex: 0 0 auto; }
.checkbox-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* ---------- Trust strip ---------- */
.trust-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center;
}
.trust-item .ico {
  width: 56px; height: 56px; border-radius: 14px; margin: 0 auto 10px;
  background: var(--blue-light); color: var(--blue-dark);
  display: grid; place-items: center; font-size: 26px;
}
.trust-item h4 { margin: 0 0 4px; font-size: 18px; }
.trust-item p { margin: 0; color: var(--gray-700); font-size: 16px; }

/* ---------- About / safety ---------- */
.about-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center;
}
.about-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 30px; box-shadow: var(--shadow-md);
}
.about-card ul { padding-left: 20px; }
.about-card li { padding: 4px 0; }

/* ---------- Footer ---------- */
.footer {
  background: #0F172A; color: #CBD5E1; padding: 48px 0 32px; margin-top: 60px;
}
.footer a { color: #93C5FD; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px;
}
.footer h5 { color: #fff; margin: 0 0 12px; font-size: 16px; text-transform: uppercase; letter-spacing: .06em; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { padding: 4px 0; }
.footer .legal {
  border-top: 1px solid #1E293B; margin-top: 32px; padding-top: 18px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  color: #94A3B8; font-size: 15px;
}

/* ---------- Utility ---------- */
.center { text-align: center; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.hidden { display: none !important; }
.success-box {
  background: #ECFDF5; border: 2px solid #A7F3D0; color: #065F46;
  padding: 20px; border-radius: 12px; font-weight: 600;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  body { font-size: 18px; }
  .hero { padding: 40px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .problem, .services, .pricing, .testimonials, .trust-strip, .about-grid, .footer-grid {
    grid-template-columns: 1fr;
  }
  .services { grid-template-columns: 1fr 1fr; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 12px 24px 18px; gap: 14px;
    border-bottom: 1px solid var(--gray-200);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; border-bottom: 1px solid var(--gray-100); }
  .nav-cta { margin: 8px 0 0; text-align: center; }
  .menu-toggle { display: inline-block; }
  .cta-banner { grid-template-columns: 1fr; text-align: center; padding: 32px; }
  .plan.featured { transform: none; }
  .field.row { grid-template-columns: 1fr; }
  .checkbox-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .services { grid-template-columns: 1fr; }
  .hero p.lead { font-size: 19px; }
  .topbar { font-size: 15px; }
}

/* ---------- Print ---------- */
@media print {
  .header, .topbar, .footer, .nav, .hero-ctas, .cta-banner { display: none; }
  body { font-size: 14px; }
  section { padding: 12px 0; }
}