/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #fafaf9;
  --color-surface: #ffffff;
  --color-text: #1c1917;
  --color-text-muted: #57534e;
  --color-primary: #16a34a;
  --color-primary-dark: #15803d;
  --color-primary-light: #dcfce7;
  --color-accent: #eab308;
  --color-border: #e7e5e4;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1100px;
  --radius: 8px;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

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

/* ===== Header / Nav ===== */
header {
  position: sticky;
  top: 0;
  background: rgba(250, 250, 249, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.15rem;
}

.logo-icon {
  font-size: 1.5rem;
}

.nav-cta {
  display: inline-block;
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.nav-cta:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

/* ===== Hero ===== */
.hero {
  padding: 100px 0 80px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.hero-accent {
  color: var(--color-primary);
}

.hero-subtitle {
  max-width: 600px;
  margin: 0 auto 40px;
  font-size: 1.2rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== Features ===== */
.features {
  padding: 80px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.features h2,
.how-it-works h2,
.waitlist h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 48px;
  letter-spacing: -0.01em;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.feature-card {
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-bg);
  transition: box-shadow 0.2s;
}

.feature-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* ===== How it works ===== */
.how-it-works {
  padding: 80px 0;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 40px;
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 800;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ===== Waitlist ===== */
.waitlist {
  padding: 80px 0 100px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.waitlist-subtitle {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

.waitlist-form {
  max-width: 440px;
  margin: 0 auto;
  text-align: left;
}

.form-fields {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form-group input[type="text"],
.form-group input[type="email"] {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.15s;
  font-family: var(--font-sans);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus {
  border-color: var(--color-primary);
}

.form-group-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.form-group-checkbox input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--color-primary);
}

.form-group-checkbox label {
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.btn-full {
  width: 100%;
  text-align: center;
}

.form-note {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
}

.form-error {
  margin-top: 12px;
  font-size: 0.9rem;
  color: #dc2626;
  text-align: center;
}

.waitlist-success p {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  padding: 16px;
  background: var(--color-primary-light);
  border-radius: var(--radius);
}

/* ===== Footer ===== */
footer {
  padding: 32px 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .hero {
    padding: 64px 0 48px;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .features,
  .how-it-works,
  .waitlist {
    padding: 56px 0;
  }

  .form-row {
    flex-direction: column;
  }

  .form-row .btn {
    width: 100%;
  }
}