/* =============================================
   My Fellow AI — Pre-production Landing Page
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* --- Design Tokens --- */
:root {
  --primary: #7C9A8E;
  --primary-dark: #5F7D71;
  --accent: #D4C4A8;
  --bg: #F8F6F3;
  --surface: #FFFFFF;
  --text: #2D3436;
  --text-secondary: #636E72;
  --radius-sm: 8px;
  --transition: 0.25s ease;
  --max-width: 720px;
}

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

html {
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--primary-dark);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--primary);
}

/* --- Container --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: inherit;
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.75rem;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

/* --- Hero --- */
.hero {
  background: linear-gradient(160deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 10rem 0 8rem;
  text-align: center;
  flex: 1;
  display: flex;
  align-items: center;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-tagline {
  font-size: 1.3rem;
  opacity: 0.95;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.hero-sub {
  font-size: 1.05rem;
  opacity: 0.8;
  max-width: 80%;
  margin: 0 auto;
  line-height: 1.6;
}

.hero-sub-1 {
  margin-bottom: 1.8rem;
}

.hero-sub-2 {
  margin-bottom: 0.1rem;
}

/* --- Footer --- */
.site-footer {
  background: var(--text);
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  padding: 2rem 0;
  font-size: 0.9rem;
}

/* --- Animations --- */
.section-animate {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.section-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 767px) {
  .hero {
    padding: 6rem 0 4rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-tagline {
    font-size: 1.1rem;
  }

  .hero-sub {
    max-width: 90%;
  }
}

@media (min-width: 1024px) {
  .hero h1 {
    font-size: 3.5rem;
  }

  .hero-sub {
    max-width: 600px;
  }
}