/* ─────────────────────────────────────────────────────────────────────────
   Techzad Inc. — studio page
   Mirrors the Sidekick site's surface-tier system + Inter typography for
   visual consistency across the org's properties, but with a more
   monochrome / sophisticated palette (parent studio, not product brand).
   ───────────────────────────────────────────────────────────────────────── */

:root {
  /* Surface tier */
  --surface-base: #F5F6F7;
  --surface-low: #EFF1F2;
  --surface: #FFFFFF;
  --surface-container: #E6E8EA;
  --surface-high: #E0E3E4;
  --surface-highest: #DADDDF;

  /* Text */
  --on-surface: #1A1D1E;
  --on-surface-variant: #595C5D;
  --outline: #757778;
  --outline-variant: #ABADAE;

  /* Brand — Techzad uses a refined warm-neutral accent
     instead of Sidekick's hero blue. Distinct but related. */
  --primary: #1A1D1E;
  --primary-soft: #2C2F30;
  --accent: #C29A4D;  /* warm gold for the gradient text only */

  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Radius + spacing */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;
  --r-full: 9999px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface-base: #0E1112;
    --surface-low: #16191A;
    --surface: #202425;
    --surface-container: #1A1D1E;
    --surface-high: #24272A;
    --surface-highest: #2E3133;
    --on-surface: #E8EAEB;
    --on-surface-variant: #ABADAE;
    --outline: #898B8C;
    --outline-variant: #595C5D;
    --primary: #E8EAEB;
    --primary-soft: #C6C9CA;
    --accent: #E0BC7A;
  }
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--on-surface);
  background: var(--surface-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Nav ──────────────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--surface-base) 92%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid color-mix(in srgb, var(--outline-variant) 25%, transparent);
}
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.wordmark {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  font-weight: 500;
  color: var(--on-surface-variant);
}
.nav-links a:hover { color: var(--on-surface); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--r-full);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 18px;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}
.btn-ghost-sm {
  padding: 8px 14px;
  font-size: 13px;
  border-color: var(--outline-variant);
  color: var(--on-surface);
}
.btn-ghost-sm:hover {
  background: var(--surface);
  border-color: var(--outline);
}
.btn-link {
  padding: 0;
  border-radius: 0;
  color: var(--on-surface-variant);
  font-weight: 500;
}
.btn-link:hover { color: var(--on-surface); }

/* ─── Hero ──────────────────────────────────────────────────────────── */
.hero {
  padding: 96px 0 80px;
}
.hero-inner {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--on-surface-variant);
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  padding: 6px 14px;
  border-radius: var(--r-full);
  margin-bottom: 28px;
  letter-spacing: 0.01em;
}
.hero h1 {
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
  color: var(--on-surface);
}
.grad-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-sub {
  font-size: 18px;
  color: var(--on-surface-variant);
  margin: 0 auto 32px;
  max-width: 540px;
  line-height: 1.55;
}
.hero-trust {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--on-surface-variant);
  align-items: center;
  justify-content: center;
}

/* ─── Section primitives ──────────────────────────────────────────── */
.section-title {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--on-surface);
  margin: 0 0 8px;
}
.section-sub {
  font-size: 16px;
  color: var(--on-surface-variant);
  margin: 0 0 40px;
}

/* ─── Services ──────────────────────────────────────────────────────── */
.services { padding: 64px 0 32px; }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.service-card {
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--r-xl);
  padding: 28px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.service-card:hover {
  border-color: var(--outline);
  transform: translateY(-2px);
}
.service-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.service-icon svg { width: 22px; height: 22px; }
.service-card h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
  color: var(--on-surface);
}
.service-card p {
  font-size: 14.5px;
  color: var(--on-surface-variant);
  margin: 0;
  line-height: 1.6;
}

/* ─── Work ──────────────────────────────────────────────────────────── */
.work { padding: 64px 0; }
.product-card {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--r-xl);
  padding: 28px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.product-card:hover {
  border-color: var(--outline);
  transform: translateY(-2px);
}
.product-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, #0846ED 0%, #1A73E8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.product-mark {
  font-weight: 800;
  font-size: 20px;
  color: #fff;
  letter-spacing: -0.02em;
}
.product-body { flex: 1; }
.product-meta {
  margin-bottom: 6px;
}
.product-status {
  font-size: 11px;
  font-weight: 600;
  color: var(--on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.product-body h3 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  color: var(--on-surface);
}
.product-body p {
  font-size: 15px;
  color: var(--on-surface-variant);
  margin: 0 0 14px;
  line-height: 1.6;
}
.product-links {
  display: flex;
  gap: 20px;
}

/* ─── About ─────────────────────────────────────────────────────────── */
.about { padding: 64px 0 96px; }
.about-inner { max-width: 720px; }
.about p {
  font-size: 16px;
  color: var(--on-surface-variant);
  margin: 0 0 16px;
  line-height: 1.7;
}

/* ─── Contact ──────────────────────────────────────────────────────── */
.contact {
  padding: 80px 0 96px;
  background: var(--surface-low);
  border-top: 1px solid var(--outline-variant);
  border-bottom: 1px solid var(--outline-variant);
}
.contact-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}
.contact h2 {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--on-surface);
  margin: 0 0 12px;
}
.contact p {
  font-size: 16px;
  color: var(--on-surface-variant);
  margin: 0 0 28px;
}

.btn-primary {
  background: var(--primary);
  color: var(--surface);
  border: 1px solid var(--primary);
  padding: 14px 24px;
  font-size: 15px;
}
.btn-primary:hover {
  background: var(--primary-soft);
  border-color: var(--primary-soft);
}
.arrow {
  display: inline-block;
  transition: transform 0.15s ease;
}
.btn-primary:hover .arrow {
  transform: translateX(2px);
}

@media (prefers-color-scheme: dark) {
  .btn-primary {
    color: var(--surface-base);
  }
}

/* ─── Footer ──────────────────────────────────────────────────────── */
.footer {
  padding: 32px 0 48px;
  border-top: 1px solid var(--outline-variant);
  background: var(--surface-low);
}
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-meta {
  font-size: 12px;
  color: var(--on-surface-variant);
}
.footer-links {
  display: flex;
  gap: 24px;
  font-size: 13px;
  color: var(--on-surface-variant);
}
.footer-links a:hover { color: var(--on-surface); }

/* ─── Mobile ──────────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .services-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-links { gap: 18px; }
  .nav-links a:not(.btn) { display: none; }
  .hero { padding: 64px 0 56px; }
  .hero-trust { gap: 6px; font-size: 12px; }
  .services { padding: 56px 0 24px; }
  .service-card { padding: 22px; }
  .product-card {
    flex-direction: column;
    padding: 22px;
    gap: 18px;
  }
  .contact { padding: 64px 0 80px; }
  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }
}