/* Tendo landing page — single static stylesheet, no framework, no JS deps. */

* {
  box-sizing: border-box;
}
:root {
  --bg: #ffffff;
  --bg-soft: #f6f6f7;
  --ink: #0e0f10;
  --ink-soft: #4a5057;
  --line: #e3e5e7;
  --accent: #0e0f10;
  --accent-ink: #ffffff;
  --radius: 10px;
  --maxw: 1080px;
}
html,
body {
  margin: 0;
  padding: 0;
  color: var(--ink);
  background: var(--bg);
  font-family:
    -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  z-index: 10;
}
nav {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
}
.brand {
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  margin-left: 24px;
  font-size: 14px;
}
.nav-links a:hover {
  color: var(--ink);
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 72px 0;
  border-bottom: 1px solid var(--line);
}
section:last-of-type {
  border-bottom: none;
}

.hero {
  text-align: center;
  padding: 96px 0 88px;
}
.hero h1 {
  font-size: clamp(36px, 5.5vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  font-weight: 700;
}
.hero h1 br {
  display: none;
}
@media (min-width: 720px) {
  .hero h1 br {
    display: inline;
  }
}
.lede {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 auto 28px;
}
.cta {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  padding: 14px 22px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  transition: transform 80ms ease;
}
.cta:hover {
  transform: translateY(-1px);
}
.cta-meta {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 14px;
}

h2 {
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.01em;
  margin: 0 0 32px;
  font-weight: 700;
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding-left: 0;
  list-style: none;
  counter-reset: step;
}
@media (min-width: 720px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}
.steps li {
  position: relative;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px 24px;
  counter-increment: step;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 24px;
  background: var(--ink);
  color: var(--accent-ink);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
}
.steps strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  color: var(--ink);
}
.steps li {
  color: var(--ink-soft);
  font-size: 14.5px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 720px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  letter-spacing: -0.005em;
}
.card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14.5px;
}

.price-card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 480px;
}
.price-amount {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.price-amount span {
  font-size: 16px;
  font-weight: 400;
  color: var(--ink-soft);
}
.price-list {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--ink-soft);
  font-size: 14.5px;
}
.price-list li {
  margin-bottom: 6px;
}

#waitlist form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 480px;
}
#waitlist input {
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  font-size: 15px;
  font-family: inherit;
  background: white;
}
#waitlist input:focus {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
#waitlist button {
  padding: 12px 18px;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: opacity 80ms ease;
}
#waitlist button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.form-msg {
  margin-top: 12px;
  font-size: 14px;
  min-height: 20px;
}
.form-msg.success {
  color: #2e7d4f;
}
.form-msg.error {
  color: #b3261e;
}

footer {
  border-top: 1px solid var(--line);
  margin-top: 32px;
}
.footer-row {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 13.5px;
  color: var(--ink-soft);
}
.footer-row a {
  color: var(--ink-soft);
  text-decoration: none;
}
.footer-row a:hover {
  color: var(--ink);
}