/* Design tokens ("Frontier" system, light variant) */
:root {
  --bg: #f7f7fb;
  --bg-alt: #eef0f6;
  --panel: #ffffff;
  --border: #e2e5ee;
  --text-heading: #14162a;
  --text-body: #4b4f63;
  --text-muted: #7b7f92;
  --ember-1: #e8813a;
  --ember-2: #d6431f;
  --ember-gradient: linear-gradient(90deg, var(--ember-1), var(--ember-2));
  --on-gradient: #14162a;
  --radius: 10px;
  --max-width: 1100px;
  --font: -apple-system, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text-body);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { color: var(--text-heading); line-height: 1.25; margin: 0 0 0.5em; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 24px;
}
.section-inner.narrow { max-width: 720px; }

.wordmark { font-weight: 800; font-size: 1.1rem; color: var(--text-heading); }
.wordmark-mark {
  background: var(--ember-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 12px 22px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  text-align: center;
}
.btn-primary {
  background: var(--ember-gradient);
  color: var(--on-gradient);
  transition: filter 0.15s ease;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-small { padding: 8px 16px; font-size: 0.85rem; }

.nav {
  position: sticky;
  top: 0;
  background: rgba(247, 247, 251, 0.85);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--text-body); font-size: 0.9rem; }
.nav-links a:hover { color: var(--text-heading); }

.footer {
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer .wordmark { display: inline-block; margin-bottom: 8px; }
.footer-tagline { color: var(--text-body); }
.footer-contact a { color: var(--ember-2); }
.footer-legal { color: var(--text-muted); font-size: 0.85rem; }

@media (max-width: 640px) {
  .nav-links { display: none; }
}

.hero { padding-top: 24px; }
.hero-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 24px 64px;
  text-align: center;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.75rem;
  color: var(--ember-2);
  font-weight: 700;
  margin-bottom: 12px;
}
.hero h1 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.hero-subhead {
  color: var(--text-body);
  font-size: 1.05rem;
  margin-bottom: 28px;
}

.waitlist-form {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.waitlist-form[hidden] { display: none; }
.waitlist-form input[type="text"] {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-heading);
  padding: 12px 14px;
  font-size: 0.95rem;
  min-width: 260px;
  flex: 1 1 260px;
  max-width: 340px;
}
.waitlist-form input[type="text"]:focus {
  outline: 2px solid var(--ember-2);
  outline-offset: 1px;
}

.form-error {
  color: var(--ember-2);
  font-size: 0.85rem;
  margin-bottom: 8px;
}
.form-success {
  color: var(--text-heading);
  font-weight: 600;
  margin-bottom: 8px;
}

.surface-strip {
  display: flex;
  gap: 10px;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 28px 0 12px;
  flex-wrap: wrap;
}
.stat-line {
  color: var(--text-body);
  font-size: 0.95rem;
}
.stat-line strong { color: var(--text-heading); }

@media (max-width: 640px) {
  .hero h1 { font-size: 1.8rem; }
  .waitlist-form input[type="text"] { max-width: 100%; }
}

.problem { background: var(--bg-alt); text-align: center; }
.problem h2 { font-size: 1.6rem; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.step {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.step-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--ember-gradient);
  color: var(--on-gradient);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.step p { color: var(--text-body); font-size: 0.92rem; margin-bottom: 0; }

@media (max-width: 1024px) {
  .steps { grid-template-columns: 1fr; }
}

.creative-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.creative-card {
  margin: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.creative-card img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: contain;
  background: var(--bg-alt);
}
.creative-card figcaption {
  padding: 14px 16px;
  color: var(--text-body);
  font-size: 0.88rem;
}

@media (max-width: 1024px) {
  .creative-grid { grid-template-columns: 1fr; }
}

.section-subhead { color: var(--text-body); margin-top: -8px; margin-bottom: 32px; }
.surface-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.surface-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.surface-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  background: var(--ember-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.surface-example { color: var(--text-body); font-size: 0.9rem; margin-bottom: 6px; }
.surface-formats { color: var(--text-muted); font-size: 0.8rem; margin-bottom: 0; }

@media (max-width: 1024px) {
  .surface-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .surface-grid { grid-template-columns: 1fr; }
}

.performance { background: var(--bg-alt); text-align: center; }
.performance h2 { font-size: 1.6rem; }
.performance-stat {
  margin-top: 24px;
  padding: 16px 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-body);
}
.performance-stat strong { color: var(--text-heading); }

.waitlist-cta { text-align: center; }
.waitlist-cta h2 { font-size: 1.8rem; }
.waitlist-form-large { margin-top: 24px; }

.accordion { margin-top: 24px; }
.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: var(--panel);
  overflow: hidden;
}
.accordion-trigger {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-heading);
  font-size: 0.98rem;
  font-weight: 600;
  text-align: left;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}
.accordion-icon {
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--ember-2);
  border-bottom: 2px solid var(--ember-2);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  flex-shrink: 0;
  margin-left: 12px;
}
.accordion-trigger[aria-expanded="true"] .accordion-icon { transform: rotate(-135deg); }
.accordion-panel { padding: 0 20px 18px; color: var(--text-body); font-size: 0.92rem; }
.accordion-panel p { margin: 0; }

[data-fade-in] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
[data-fade-in].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 640px) {
  .section-inner { padding: 48px 20px; }
  .waitlist-cta h2 { font-size: 1.5rem; }
  .performance h2 { font-size: 1.35rem; }
}