/* Zentro marketing homepage styles (mobile-first) */

:root {
  --bg: #ffffff;
  --text: #0b0e14;
  --muted: #3b4350;
  --brand-start: #00ffc6;
  --brand-end: #00a3ff;
  --brand: #0bbbd6; /* mid tone */
  --surface: #f6f8fb;
  --border: #e5eaf0;
  --focus: #0b8fff;
  --shadow: 0 1px 2px rgba(0,0,0,0.05), 0 6px 24px rgba(0,0,0,0.05);
}

/* Reset-ish */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.container {
  width: 100%;
  max-width: 960px;
  margin-inline: auto;
  padding: 16px;
}

.page { display: block; }

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  display: block;
  width: 32px; height: 32px;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.brand-name {
  font-weight: 700;
  font-size: 18px;
}

.site-nav { display: flex; align-items: center; gap: 8px; }

/* Hero */
.hero {
  padding-block: 32px;
  text-align: left;
}

.hero h1 {
  margin: 0 0 8px 0;
  font-size: 40px;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.subhead {
  margin: 0 0 16px 0;
  color: var(--muted);
  font-size: 18px;
}

.hero-cta { margin-top: 8px; }

/* Buttons */
.btn {
  --pad-y: 10px; --pad-x: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: var(--pad-y) var(--pad-x);
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  line-height: 1;
  transition: transform .06s ease, background .2s ease, box-shadow .2s ease, border-color .2s ease;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.btn-primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--brand-start), var(--brand-end));
  color: #003046;
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn[disabled], .btn[aria-disabled="true"] {
  opacity: .6;
  cursor: not-allowed;
}

.btn-lg { --pad-y: 14px; --pad-x: 18px; font-size: 16px; }

/* Features */
.features { padding-block: 24px; }

.feature-grid {
  list-style: none; margin: 0; padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.feature-card h3 {
  margin: 0 0 6px 0;
  font-size: 18px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
}

/* Coming soon */
.coming-soon { padding-block: 24px; }
.coming-soon h2 { margin: 0 0 8px 0; font-size: 20px; }
.badge-row { display: flex; gap: 8px; margin-top: 8px; }

/* Footer */
.site-footer {
  padding-block: 24px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

.footer-link { color: inherit; text-decoration: none; }
.footer-link:hover { text-decoration: underline; }

/* Larger screens */
@media (min-width: 768px) {
  .hero { padding-block: 56px; }
  .hero h1 { font-size: 56px; }
  .subhead { font-size: 20px; }

  .feature-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}