*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink: #0d0d0d;
  --bg: #fafafa;
  --primary: #0d0d0d;
  --text2: #6b6b6b;
  --line: #e8e8e8;
  --radius: 16px;
  --font: 'Manrope', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* NAV */
.nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 40px;
  background: rgba(250,250,250,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.logo { font-size: 18px; font-weight: 800; text-decoration: none; color: var(--ink); letter-spacing: -0.5px; }
.logo span { color: var(--text2); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { text-decoration: none; color: var(--text2); font-size: 15px; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--ink); }
.btn-nav {
  padding: 8px 20px;
  background: var(--ink); color: #fff;
  border-radius: 100px; font-size: 14px; font-weight: 700;
  transition: opacity .2s;
}
.btn-nav:hover { opacity: .8; color: #fff; }

/* HERO */
.hero {
  min-height: 92vh;
  display: flex; align-items: center;
  padding: 80px 40px 40px;
  overflow: hidden;
}
.hero-inner { max-width: 1100px; margin: 0 auto; width: 100%; }
.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: #f0f0f0; border-radius: 100px;
  font-size: 13px; font-weight: 600; color: var(--text2);
  margin-bottom: 24px;
}
h1 {
  font-size: clamp(52px, 8vw, 96px);
  font-weight: 800; line-height: 1.0;
  letter-spacing: -3px;
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 18px; color: var(--text2);
  max-width: 480px; line-height: 1.6;
  margin-bottom: 40px;
}
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 64px; }
.btn-primary {
  padding: 14px 28px;
  background: var(--ink); color: #fff;
  border-radius: 100px; text-decoration: none;
  font-size: 16px; font-weight: 700;
  transition: opacity .2s;
}
.btn-primary:hover { opacity: .8; }
.btn-ghost {
  padding: 14px 28px;
  border: 1.5px solid var(--line); border-radius: 100px;
  text-decoration: none; color: var(--ink);
  font-size: 16px; font-weight: 600;
  transition: border-color .2s;
}
.btn-ghost:hover { border-color: var(--ink); }

/* PHONE MOCKUP */
.hero-preview { display: flex; justify-content: flex-start; }
.phone-mockup {
  width: 280px; height: 560px;
  background: var(--ink); border-radius: 40px;
  padding: 12px;
  box-shadow: 0 40px 80px rgba(0,0,0,.18), 0 0 0 1px rgba(0,0,0,.08);
}
.phone-screen {
  width: 100%; height: 100%;
  background: #fff; border-radius: 30px;
  overflow: hidden;
}
.phone-screen iframe {
  width: 375px; height: 812px;
  border: none;
  transform: scale(0.7117); transform-origin: top left;
  pointer-events: none;
}

/* FEATURES */
.features {
  padding: 100px 40px;
  background: #fff;
  border-top: 1px solid var(--line);
}
.features h2 {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800; letter-spacing: -1.5px;
  margin-bottom: 56px;
  max-width: 1100px; margin-left: auto; margin-right: auto;
}
.feature-grid {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  padding: 32px;
  border: 1px solid var(--line); border-radius: var(--radius);
  transition: border-color .2s, transform .2s;
}
.feature-card:hover { border-color: #ccc; transform: translateY(-2px); }
.feature-icon { font-size: 28px; margin-bottom: 16px; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { color: var(--text2); font-size: 15px; line-height: 1.6; }

/* APP SECTION */
.app {
  padding: 100px 40px;
  background: var(--ink); color: #fff;
}
.app-inner { max-width: 1100px; margin: 0 auto; }
.app-text h2 {
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 800; letter-spacing: -2px;
  margin-bottom: 16px;
}
.app-text p { font-size: 18px; color: rgba(255,255,255,.6); margin-bottom: 36px; max-width: 480px; }
.app-buttons { display: flex; gap: 12px; flex-wrap: wrap; }
.store-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  background: rgba(255,255,255,.1); color: #fff;
  border-radius: 12px; text-decoration: none;
  font-size: 15px; font-weight: 600;
  border: 1px solid rgba(255,255,255,.15);
  transition: background .2s;
}
.store-btn:hover { background: rgba(255,255,255,.18); }
.store-btn-outline { background: transparent; }

/* FOOTER */
.footer {
  padding: 40px;
  border-top: 1px solid var(--line);
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 16px;
}
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { text-decoration: none; color: var(--text2); font-size: 14px; transition: color .2s; }
.footer-links a:hover { color: var(--ink); }
.footer-copy { color: var(--text2); font-size: 13px; }

/* RESPONSIVE */
@media (max-width: 640px) {
  .nav { padding: 16px 20px; }
  .hero { padding: 60px 20px 40px; }
  h1 { letter-spacing: -2px; }
  .features, .app, .footer { padding: 64px 20px; }
  .phone-mockup { width: 240px; height: 480px; }
  .phone-screen iframe { transform: scale(0.61); }
}