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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #16161f;
  --text-primary: #e8e8ed;
  --text-secondary: #9494a0;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --border: #1e1e2a;
  --radius: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

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

img {
  max-width: 100%;
  display: block;
}

/* ---- NAV ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
}

.nav-logo svg {
  width: 28px;
  height: 28px;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* hamburger open state */
.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li a {
    display: block;
    padding: 14px 24px;
  }
}

/* ---- SECTIONS ---- */
section {
  padding: 96px 24px;
}

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

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 560px;
  line-height: 1.7;
}

/* ---- HERO ---- */
.hero {
  padding-top: 160px;
  padding-bottom: 96px;
  text-align: center;
}

.hero-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 28px;
  color: var(--accent);
}

.hero h1 {
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.app-store-badge {
  display: inline-block;
  transition: opacity 0.2s;
}

.app-store-badge:hover {
  opacity: 0.85;
}

.app-store-badge svg {
  height: 54px;
  width: auto;
}

/* ---- FEATURES ---- */
.features {
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  color: var(--accent);
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ---- SECURITY ---- */
.security-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.security-item {
  display: flex;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.security-item svg {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--accent);
  margin-top: 2px;
}

.security-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.security-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

@media (max-width: 700px) {
  .security-grid {
    grid-template-columns: 1fr;
  }
}

/* ---- PREMIUM ---- */
.premium {
  background: var(--bg-secondary);
}

.premium-card {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(99, 102, 241, 0.03));
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius);
  padding: 48px;
  margin-top: 48px;
  display: flex;
  gap: 48px;
  align-items: center;
}

.premium-content {
  flex: 1;
}

.premium-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.premium-content > p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}

.premium-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.premium-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
}

.premium-features svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
  flex-shrink: 0;
}

.premium-side {
  font-size: 5rem;
  line-height: 1;
  opacity: 0.15;
}

@media (max-width: 700px) {
  .premium-card {
    flex-direction: column;
    padding: 32px 24px;
    gap: 24px;
  }

  .premium-side {
    display: none;
  }
}

/* ---- DOWNLOAD ---- */
.download {
  text-align: center;
}

.download .section-subtitle {
  margin: 0 auto 36px;
}

/* ---- FOOTER ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: var(--text-primary);
}

@media (max-width: 560px) {
  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ---- ANIMATIONS ---- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- PRIVACY PAGE ---- */
.privacy-page {
  padding-top: 128px;
  padding-bottom: 64px;
}

.privacy-page h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 8px;
}

.privacy-page .last-updated {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 48px;
}

.privacy-page h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 12px;
}

.privacy-page p,
.privacy-page ul {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.privacy-page ul {
  padding-left: 24px;
}

.privacy-page li {
  margin-bottom: 8px;
}