/* ===========================
   Base + Theme
   =========================== */

:root {
  --bg-body: #030816;
  --bg-hero-start: #ffb07c;
  --bg-hero-end: #ff6f61;
  --bg-ocean-start: #1f9bff;
  --bg-ocean-end: #0b68f0;
  --bg-card: #ffffff;
  --bg-footer: #030816;

  --text-main: #0b1220;
  --text-muted: #64748b;
  --text-on-dark: #e5ecff;

  --accent: #0b68f0;
  --accent-soft: rgba(11, 104, 240, 0.1);

  --radius-card: 24px;
  --radius-pill: 999px;

  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.22);
  --shadow-card: 0 10px 30px rgba(15, 23, 42, 0.14);
}

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

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter",
               "Segoe UI", sans-serif;
  color: var(--text-main);
  background: radial-gradient(circle at top, #020617 0, #020617 40%, #020617 100%);
  -webkit-font-smoothing: antialiased;
}

/* ===========================
   Layout
   =========================== */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===========================
   Header
   =========================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(2, 6, 23, 0.8);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.4);
}

.brand-name {
  font-weight: 600;
  letter-spacing: 0.03em;
  color: #e5ecff;
  font-size: 0.95rem;
}

.nav a {
  margin-left: 18px;
  font-size: 0.9rem;
  color: #cbd5f5;
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 999px;
  transition: background 0.18s ease, color 0.18s ease;
}

.nav a:hover {
  background: rgba(148, 163, 184, 0.22);
  color: #f9fafb;
}

/* ===========================
   Hero
   =========================== */

.hero {
  background: linear-gradient(160deg, var(--bg-hero-start), var(--bg-hero-end));
  color: #0f172a;
  padding: 72px 0 80px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.4rem, 3.1vw, 2.9rem);
  line-height: 1.1;
  margin: 0 0 16px;
}

.hero-tagline {
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-size: 0.75rem;
  color: rgba(15, 23, 42, 0.7);
  margin-bottom: 8px;
}

.hero-subtitle {
  font-size: 1rem;
  line-height: 1.6;
  color: rgba(15, 23, 42, 0.86);
  max-width: 32rem;
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  background: #020617;
  color: #f9fafb;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(15, 23, 42, 0.7);
  transition: transform 0.14s ease, box-shadow 0.14s ease, background 0.14s ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 45px rgba(15, 23, 42, 0.3);
  background: #02051a;
}

.button-subtitle {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  opacity: 0.7;
}

.button-title {
  font-size: 0.95rem;
  font-weight: 600;
}

.hero-note {
  margin-top: 18px;
  font-size: 0.85rem;
  color: rgba(15, 23, 42, 0.8);
  font-weight: bold; 
}

.hero-image {
  display: flex;
  justify-content: center;
}

.device-frame {
  border-radius: 40px;
  padding: 14px 10px;
  background: radial-gradient(circle at top, #ffffff 0, #f1f5f9 45%, #cbd5f5 100%);
  box-shadow: var(--shadow-soft);
  max-width: 320px;
}

.device-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 30px;
}

.device-frame.small {
  max-width: 280px;
  padding: 12px 8px;
  border-radius: 36px;
}

/* ===========================
   Features
   =========================== */

.features {
  background: radial-gradient(circle at top, #020617 0, #020617 40%, #020617 100%);
  color: var(--text-on-dark);
  padding: 72px 0 80px;
}

.features h2 {
  text-align: center;
  font-size: 1.9rem;
  margin-bottom: 12px;
}

.section-intro {
  text-align: center;
  max-width: 34rem;
  margin: 0 auto 40px;
  font-size: 0.98rem;
  color: #9ca3ff;
}

.feature-grid {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.feature-card {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 26px;
  align-items: center;
  padding: 22px 22px 22px 22px;
  border-radius: var(--radius-card);
  background: radial-gradient(circle at top left, #0b1120 0, #020617 40%, #020617 100%);
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(148, 163, 184, 0.22);
}

.feature-card.reverse {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
}

.feature-text h3 {
  margin: 0 0 6px;
  font-size: 1.2rem;
}

.feature-text p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.6;
  color: #cbd5f5;
}

.feature-image {
  display: flex;
  justify-content: center;
}

/* ===========================
   Privacy Section
   =========================== */

.privacy-callout {
  background: linear-gradient(160deg, var(--bg-ocean-start), var(--bg-ocean-end));
  color: #f9fafb;
  padding: 56px 0 60px;
}

.privacy-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.privacy-text h2 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.privacy-text p {
  margin: 0 auto 16px;
  max-width: 32rem;
  font-size: 0.98rem;
}

.privacy-links {
  display: flex;
  justify-content: center;
  gap: 10px;
  font-size: 0.9rem;
}

.privacy-links a {
  color: #e0f2fe;
  text-decoration: none;
  font-weight: 500;
}

.privacy-links a:hover {
  text-decoration: underline;
}

/* ===========================
   Footer
   =========================== */

.site-footer {
  background: radial-gradient(circle at top, #020617 0, #020617 45%, #000 100%);
  color: #9ca3c9;
  padding-top: 24px;
  padding-bottom: 18px;
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.22);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-icon {
  width: 26px;
  height: 26px;
  border-radius: 8px;
}

.footer-title {
  margin: 0;
  color: #e5ecff;
  font-weight: 600;
}

.footer-subtitle {
  margin: 0;
  font-size: 0.78rem;
  color: #9ca3c9;
}

.footer-links {
  display: flex;
  gap: 14px;
}

.footer-links a {
  color: #cbd5ff;
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 10px;
  text-align: center;
  color: #6b7280;
}

/* ===========================
   Responsiveness
   =========================== */

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero {
    padding-top: 64px;
  }

  .hero-copy {
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-subtitle,
  .hero-note {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-image {
    justify-content: center;
  }

  .feature-card,
  .feature-card.reverse {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .feature-image {
    justify-content: center;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .header-inner {
    padding: 8px 0;
  }

  .nav a {
    margin-left: 10px;
    padding-inline: 8px;
  }

  .features {
    padding-top: 56px;
  }

  .feature-card {
    padding: 18px 16px;
  }

  .device-frame.small {
    max-width: 240px;
  }
}