:root {
  --bg: #f6f8fb;
  --surface: rgba(255, 255, 255, 0.84);
  --surface-strong: #ffffff;
  --text: #111716;
  --muted: #64706d;
  --line: rgba(12, 26, 22, 0.09);
  --brand: #00c979;
  --brand-dark: #079460;
  --shadow: 0 18px 40px rgba(12, 26, 22, 0.12);
  --soft-shadow: 0 8px 24px rgba(12, 26, 22, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101413;
    --surface: rgba(30, 35, 34, 0.84);
    --surface-strong: #181d1c;
    --text: #f4faf7;
    --muted: #a7b2af;
    --line: rgba(255, 255, 255, 0.1);
    --brand: #25d366;
    --brand-dark: #74ebb0;
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
    --soft-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(0, 201, 121, 0.14), transparent 34rem),
    linear-gradient(180deg, var(--bg), var(--bg));
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
  width: 260px;
  background: var(--surface);
  border-right: 1px solid var(--line);
  padding: 30px 20px;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 10;
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 40px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-brand::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(0, 201, 121, 0.12);
}

.sidebar-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-nav a {
  text-decoration: none;
  color: var(--text);
  font-size: 15.5px;
  font-weight: 600;
  padding: 12px 16px;
  border-radius: 12px;
  transition: all 0.2s ease;
  display: block;
  border: 1px solid transparent;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
  background: rgba(0, 201, 121, 0.1);
  color: var(--brand-dark);
  border-color: rgba(0, 201, 121, 0.2);
}

.main-wrapper {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
}

.page {
  width: min(920px, 100%);
  margin: 0 auto;
  padding: max(22px, env(safe-area-inset-top)) 16px max(34px, env(safe-area-inset-bottom));
  flex: 1;
}

.hero {
  position: sticky;
  top: 0;
  z-index: 2;
  margin: 0 -16px 18px;
  padding: 18px 16px 16px;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  width: min(920px, 100%);
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 700;
  box-shadow: var(--soft-shadow);
}

.badge::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 5px rgba(0, 201, 121, 0.12);
}

h1 {
  margin: 14px 0 4px;
  font-size: clamp(34px, 9vw, 58px);
  line-height: 1.02;
  letter-spacing: 0;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.12);
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
}

.card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  margin-bottom: 24px;
}

.intro {
  padding: 30px 24px;
  background: linear-gradient(135deg, rgba(0, 201, 121, 0.12), transparent 58%);
  border-bottom: 1px solid var(--line);
}

.intro p {
  font-size: 18px;
  line-height: 1.5;
}

.content {
  padding: 4px 24px 30px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.feature-card {
  padding: 24px;
  border-radius: 16px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  box-shadow: var(--soft-shadow);
}

.feature-card h3 {
  margin-top: 0;
  color: var(--brand-dark);
  font-size: 19px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.feature-card h3::before {
  content: "✦";
  color: var(--brand);
}

.feature-card p {
  margin-bottom: 0;
  font-size: 15px;
  color: var(--muted);
}

h2 {
  margin: 28px 0 10px;
  padding-top: 2px;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: 0;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.12);
}

h3 {
  margin: 18px 0 8px;
  font-size: 17px;
  line-height: 1.25;
}

p {
  margin: 10px 0;
  color: var(--text);
  font-size: 15.5px;
}

.muted {
  color: var(--muted);
}

.notice {
  margin: 18px 0 0;
  padding: 14px;
  border: 1px solid rgba(0, 201, 121, 0.28);
  border-radius: 16px;
  background: rgba(0, 201, 121, 0.1);
  font-weight: 750;
}

ul, ol {
  margin: 10px 0 0;
  padding-left: 21px;
}

li {
  margin: 9px 0;
  color: var(--text);
  font-size: 15.5px;
}

.caps {
  padding: 14px;
  border-radius: 16px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  box-shadow: var(--soft-shadow);
  font-size: 14.5px;
  font-weight: 650;
}

.contact {
  display: inline-block;
  margin-top: 12px;
  padding: 14px 24px;
  border-radius: 16px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  color: var(--brand-dark);
  font-weight: 800;
  text-decoration: none;
  box-shadow: var(--soft-shadow);
  transition: transform 0.2s;
  overflow-wrap: anywhere;
}

.contact:hover {
  transform: translateY(-2px);
}

footer {
  padding: 20px 4px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 800px) {
  body {
    flex-direction: column;
  }
  
  .sidebar {
    display: none;
  }
  
  .main-wrapper {
    margin-left: 0;
  }
}

@supports not (backdrop-filter: blur(1px)) {
  .card,
  .hero,
  .badge,
  .sidebar {
    background: var(--surface-strong);
  }
}