:root {
  --bg: #0f1220;
  --surface: #171b2e;
  --text: #eef1f8;
  --muted: #a6adc8;
  --accent: #25d366; /* WhatsApp green */
  --accent-strong: #1eb257;
  --border: #2a3050;
  --radius: 12px;
  --max-width: 760px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family:
    system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at 20% -10%, #1b2140 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  padding: 1.5rem clamp(1rem, 4vw, 2.5rem);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: var(--accent);
  color: #08130b;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-name {
  font-size: 1.1rem;
}

main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 3.5rem) clamp(1rem, 4vw, 2.5rem);
}

.hero {
  text-align: left;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

h1 {
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.1;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.lede {
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  color: var(--muted);
  max-width: 48ch;
  margin: 0 0 2rem;
}

.signup {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.signup input {
  flex: 1 1 260px;
  min-width: 0;
  padding: 0.85rem 1rem;
  font-size: 1rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.signup input::placeholder {
  color: #6b7398;
}

.signup input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.signup button {
  flex: 0 0 auto;
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
  font-weight: 700;
  color: #08130b;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s ease;
}

.signup button:hover {
  background: var(--accent-strong);
}

.signup button:disabled {
  opacity: 0.6;
  cursor: progress;
}

.form-status {
  flex: 1 1 100%;
  margin: 0.25rem 0 0;
  font-size: 0.95rem;
  min-height: 1.4rem;
}

.form-status.is-error {
  color: #ff8a8a;
}

.form-status.is-success {
  color: var(--accent);
}

.fine-print {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.features {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-top: 3.5rem;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.feature h2 {
  font-size: 1.05rem;
  margin: 0 0 0.4rem;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  padding: 2rem clamp(1rem, 4vw, 2.5rem);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

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