* {
  box-sizing: border-box;
}
:root {
  --bg: #ffffff;
  --bg-alt: #f1f5f9;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #4f46e5;
  --primary-light: #818cf8;
  --primary-dark: #3730a3;
  --secondary: #0ea5e9;
  --accent: #f59e0b;
  --card: #ffffff;
  --border: #e2e8f0;
  --green: #10b981;
  --radius: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}
.brand .logo-img {
  height: 26px;
  width: auto;
}
.brand .name {
  letter-spacing: -0.3px;
}
.top-nav {
  display: flex;
  gap: 24px;
  align-items: center;
}
.top-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  position: relative;
  transition: color var(--transition);
}
.top-nav a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition);
}
.top-nav a:hover {
  color: var(--text);
}
.top-nav a:hover::after {
  width: 100%;
}
.top-nav .btn-outline {
  all: unset;
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: all var(--transition);
}
.top-nav .btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(79, 70, 229, 0.04);
}

/* --- Hero --- */
.hero {
  text-align: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #eef2ff 0%, #ffffff 50%, #ffffff 100%);
}
.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 20% 50%, rgba(79, 70, 229, 0.06) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(14, 165, 233, 0.04) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 80%, rgba(245, 158, 11, 0.03) 0%, transparent 50%);
  animation: heroBg 20s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes heroBg {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-2%, 2%) rotate(3deg); }
}
.hero .container {
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.15;
  margin: 0 0 16px;
  color: var(--text);
}
.hero .sub {
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  margin: 0 0 16px;
}
.hero .desc {
  max-width: 680px;
  margin: 0 auto 36px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}
.cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.hero-logo {
  height: 100px;
  width: auto;
  margin: 16px auto 0;
  display: block;
  opacity: 0.6;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
}
.btn-accent {
  background: linear-gradient(135deg, var(--green), #059669);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}
.btn-accent:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.35);
}
.btn-accent:active {
  transform: translateY(0);
}
.btn-secondary {
  background: var(--secondary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}
.btn-secondary:hover {
  background: #0284c7;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
}
.btn-outline {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(79, 70, 229, 0.04);
}
.btn-icon {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* --- Badges --- */
.badges {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.badges span {
  background: rgba(79, 70, 229, 0.06);
  border: 1px solid rgba(79, 70, 229, 0.15);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}

/* --- Sections --- */
.section {
  padding: 80px 0;
  background: var(--bg);
}
.section.alt {
  background: var(--bg-alt);
}
.section h2 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin: 0 0 12px;
  position: relative;
}
.section > .container > h2 {
  text-align: center;
}
.section > .container > h2::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  background: var(--primary);
  border-radius: 4px;
  margin: 12px auto 0;
}
.section > .container > .desc {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--muted);
  font-size: 17px;
}

/* --- Grid & Cards --- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(79, 70, 229, 0.2);
}
.card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 600;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}
.card-icon {
  font-size: 30px;
  margin-bottom: 12px;
  color: var(--primary);
  display: block;
}



/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
  background: var(--bg-alt);
}
.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.site-footer .copy {
  color: var(--muted);
  font-size: 13px;
}
.site-footer .copy a {
  color: var(--primary);
  text-decoration: none;
  margin-left: 10px;
  font-weight: 500;
  transition: color var(--transition);
}
.site-footer .copy a:hover {
  color: var(--primary-dark);
}

/* --- Blog cards --- */
.home-blog {
  background: var(--bg-alt);
}
.home-blog-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.blog-card-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.blog-card {
  display: block;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}
.blog-card h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
}
.blog-card .desc {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 14px;
}

/* --- Steps (used in blog posts) --- */
.steps {
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.7;
}
.steps li {
  margin-bottom: 8px;
}
.tips {
  margin-top: 20px;
  padding: 16px 20px;
  background: rgba(79, 70, 229, 0.04);
  border: 1px solid rgba(79, 70, 229, 0.12);
  border-radius: 12px;
  color: var(--muted);
  font-size: 14px;
}

/* --- Download section --- */
.download .steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.step {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.step ol {
  margin: 6px 0 0 18px;
  color: var(--muted);
}

/* --- Utilities --- */
.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background: rgba(0, 0, 0, 0.04);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 13px;
}
.alert {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 24px 0;
  color: #b45309;
  font-size: 14px;
}
.alert strong {
  color: #92400e;
}
.screenshot {
  width: 100%;
  max-width: 640px;
  display: block;
  margin: 12px auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

/* --- Support page --- */
.support-list {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}
.support-list strong {
  color: var(--text);
}
.support-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.support-card p {
  margin: 8px 0;
  color: var(--muted);
  font-size: 14px;
}
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.support-meta {
  color: var(--muted);
  font-size: 13px;
  margin-top: 12px;
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .top-nav {
    gap: 16px;
  }
  .top-nav a {
    font-size: 13px;
  }
  .section {
    padding: 60px 0;
  }
  .hero {
    padding: 80px 0 60px;
  }
  .hero .desc {
    font-size: 16px;
  }
}
@media (max-width: 640px) {
  .top-nav {
    gap: 10px;
  }
  .top-nav a:not(.btn-outline) {
    display: none;
  }
  .section {
    padding: 48px 0;
  }
  .section h2 {
    font-size: 24px;
  }
  .grid {
    gap: 16px;
  }
  .card {
    padding: 20px;
  }
  .home-blog-head {
    align-items: flex-start;
  }
  .blog-card {
    padding: 18px;
  }
}
@media (max-width: 480px) {
  .hero h1 {
    font-size: 28px;
  }
  .btn {
    padding: 12px 18px;
    font-size: 14px;
  }
}