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

:root {
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-200: #bbf7d0;
  --green-300: #86efac;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --green-800: #166534;
  --green-900: #14532d;

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  --white: #ffffff;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.6;
}

/* ─── Navigation ─── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-100);
}

.nav__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--gray-900);
}

.nav__brand-icon {
  width: 32px;
  height: 32px;
  background: var(--green-600);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.1rem;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav__link {
  text-decoration: none;
  color: var(--gray-600);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}

.nav__link:hover {
  color: var(--green-600);
  background: var(--green-50);
}

.nav__cta {
  background: var(--green-600);
  color: white !important;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.nav__cta:hover {
  background: var(--green-700) !important;
}

/* ─── Hero ─── */

.hero {
  padding: 140px 24px 80px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--green-50);
  color: var(--green-700);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
  border: 1px solid var(--green-200);
}

.hero__headline {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero__headline span {
  background: linear-gradient(135deg, var(--green-500), var(--green-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  font-size: 1.15rem;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn--primary {
  background: var(--green-600);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  background: var(--green-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.btn--secondary:hover {
  background: var(--gray-200);
  transform: translateY(-2px);
}

.hero__pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--gray-600);
}

.hero__pill strong {
  color: var(--green-600);
}

.hero__pill-wrap {
  margin-top: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* ─── Sections ─── */

.section {
  padding: 96px 24px;
}

.section--gray {
  background: var(--gray-50);
}

.section__inner {
  max-width: 1120px;
  margin: 0 auto;
}

.section__label {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--green-600);
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section__sub {
  font-size: 1.08rem;
  color: var(--gray-500);
  max-width: 600px;
  line-height: 1.7;
}

/* ─── Features ─── */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 24px;
  margin-top: 56px;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.25s;
}

.feature-card:hover {
  border-color: var(--green-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}

.feature-card__icon--1 { background: #eff6ff; }
.feature-card__icon--2 { background: #f0fdf4; }
.feature-card__icon--3 { background: #fefce8; }
.feature-card__icon--4 { background: #fdf2f8; }
.feature-card__icon--5 { background: #f5f3ff; }

.feature-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card__desc {
  color: var(--gray-500);
  font-size: 0.94rem;
  line-height: 1.7;
}

/* ─── Privacy ─── */

.privacy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.privacy-card {
  text-align: center;
  padding: 36px 24px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--gray-100);
}

.privacy-card__icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
  display: block;
}

.privacy-card__title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.privacy-card__desc {
  color: var(--gray-500);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ─── Platforms ─── */

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  margin-top: 40px;
}

.platform-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  background: var(--white);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
  color: var(--gray-700);
}

.platform-chip:hover {
  border-color: var(--green-300);
  box-shadow: var(--shadow);
}

.platform-chip--active {
  border-color: var(--green-300);
  background: var(--green-50);
}

.platform-chip--coming {
  color: var(--gray-400);
  border-color: var(--gray-200);
}

.platform-chip--coming span {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--gray-400);
  margin-left: 4px;
}

/* ─── Model Support ─── */

.model-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.model-tag {
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--white);
  border: 1px solid var(--gray-200);
  color: var(--gray-600);
  transition: all 0.2s;
}

.model-tag:hover {
  border-color: var(--green-300);
  color: var(--green-700);
  background: var(--green-50);
}

/* ─── Footer ─── */

.footer {
  border-top: 1px solid var(--gray-100);
  padding: 48px 24px;
  text-align: center;
}

.footer__text {
  color: var(--gray-500);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer__divider {
  width: 40px;
  height: 2px;
  background: var(--green-200);
  margin: 16px auto;
  border-radius: 2px;
}

/* ─── Responsive ─── */

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

  .hero { padding: 120px 20px 60px; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; justify-content: center; }

  .section { padding: 64px 20px; }

  .features { grid-template-columns: 1fr; }

  .platforms-grid { grid-template-columns: repeat(2, 1fr); }
}