:root {
  --bg-start: #0a1216;
  --bg-mid: #0e1c23;
  --bg-end: #070d15;
  --bg-glow-1: rgba(34, 211, 182, 0.22);
  --bg-glow-2: rgba(139, 92, 246, 0.16);
  --bg-grid: rgba(232, 240, 255, 0.03);
  --surface: rgba(13, 22, 28, 0.78);
  --surface-alt: rgba(14, 24, 30, 0.64);
  --card-radius: 22px;
  --card-cap-height: 5px;
  --card-cap: linear-gradient(90deg, rgba(34, 211, 182, 0.9), rgba(139, 92, 246, 0.9));
  --card-bg: linear-gradient(180deg, rgba(16, 22, 30, 0.96), rgba(9, 13, 19, 0.98));
  --card-shadow: 0 24px 60px rgba(4, 8, 12, 0.45);
  --text-primary: #e7ecef;
  --text-secondary: #a7b3bc;
  --text-tertiary: #82909a;
  --accent-teal: #22d3b6;
  --accent-blue: #60a5fa;
  --accent-purple: #8b5cf6;
  --accent-rose: #f472b6;
  --border-soft: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --focus-ring: rgba(96, 165, 250, 0.8);
  --menu-surface: rgba(12, 20, 26, 0.94);
  --menu-border: rgba(255, 255, 255, 0.08);
}

* {
  margin: 0;
  padding: 0;
}

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

html {
  font-size: 16px;
  background-color: var(--bg-end);
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  background:
    radial-gradient(circle at 18% -10%, var(--bg-glow-1) 0%, rgba(34, 211, 182, 0) 52%),
    radial-gradient(circle at 82% -12%, var(--bg-glow-2) 0%, rgba(139, 92, 246, 0) 48%),
    linear-gradient(180deg, var(--bg-start) 0%, var(--bg-mid) 46%, var(--bg-end) 100%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
}

button {
  font: inherit;
  color: inherit;
}

main {
  padding: 76px 24px 92px;
}

.container {
  width: min(1120px, 100%);
  margin-inline: auto;
  padding-inline: 24px;
}

.page-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  gap: 96px;
}

.page-shell > section + section {
  margin-top: 0;
}

.section-title {
  margin-bottom: 28px;
  font-size: clamp(1.1rem, 0.6rem + 1vw, 1.35rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 16px;
}

.section-title .hicon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: rgba(148, 163, 184, 0.16);
}

.section-title .hicon svg {
  width: 22px;
  height: 22px;
  stroke: rgba(226, 232, 240, 0.92);
}

.prose-tight {
  max-width: 820px;
  margin: 0 auto;
  color: var(--text-secondary);
  display: grid;
  gap: 28px;
}

.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 1200;
  backdrop-filter: blur(18px);
  background: rgba(6, 12, 18, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 4px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.logo {
  width: 46px;
  height: auto;
}

.header-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
}

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

.btn-login {
  padding: 3px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 500;
  transition: all 0.25s ease;
}

.btn-login:hover {
  border-color: rgba(96, 165, 250, 0.7);
  color: #f8fafc;
  box-shadow: 0 8px 18px rgba(96, 165, 250, 0.15);
}

.btn-login:focus-visible {
  border-color: var(--focus-ring);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.22);
}

.hamburger {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
  transition: all 0.25s ease;
}

.hamburger svg {
  width: 18px;
  height: 18px;
  stroke: rgba(226, 232, 240, 0.9);
  stroke-width: 1.8;
  stroke-linecap: round;
}

.hamburger:hover,
.hamburger[aria-expanded="true"] {
  border-color: rgba(96, 165, 250, 0.5);
  color: #fff;
  box-shadow: 0 10px 30px rgba(96, 165, 250, 0.18);
  background: rgba(96, 165, 250, 0.08);
}

body.open {
  overflow: hidden;
}

#backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 10, 14, 0.72);
  backdrop-filter: blur(14px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 900;
}

#backdrop.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.menu-panel {
  position: fixed;
  top: 64px;
  right: 24px;
  width: min(360px, calc(100% - 32px));
  max-height: calc(100vh - 140px);
  background: var(--menu-surface);
  border: 1px solid var(--menu-border);
  border-radius: 28px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  transform: translateY(-16px);
  opacity: 0;
  visibility: hidden;
  overflow-y: auto;
  box-shadow: 0 28px 60px rgba(4, 10, 14, 0.48);
  transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
  z-index: 950;
}

.menu-panel.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.menu-label {
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.68rem;
  color: rgba(226, 232, 240, 0.74);
}

.menu-close {
  border: none;
  background: transparent;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(226, 232, 240, 0.6);
  cursor: pointer;
  padding: 4px 6px;
  transition: color 0.2s ease;
}

.menu-close:hover {
  color: var(--text-primary);
}

.menu-list {
  display: grid;
  gap: 6px;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 12px;
  border-radius: 18px;
  color: rgba(226, 232, 240, 0.86);
  font-size: 1.05rem;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.menu-item:hover,
.menu-item:focus-visible {
  background: rgba(96, 165, 250, 0.1);
  color: #f9fbff;
  transform: translateX(3px);
}

.menu-item[aria-current="page"] {
  background: rgba(96, 165, 250, 0.12);
  color: #f9fbff;
  border: 1px solid rgba(96, 165, 250, 0.24);
}

.menu-icon {
  width: 26px;
  height: 26px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-icon svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke: currentColor;
}

.hero {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  background: linear-gradient(140deg, rgba(11, 20, 27, 0.95) 0%, rgba(10, 17, 24, 0.9) 100%);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: clamp(48px, 8vw, 72px) clamp(28px, 6vw, 64px);
  text-align: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px),
    linear-gradient(0deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: 0.35;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(96, 165, 250, 0.22) 0%, rgba(96, 165, 250, 0) 60%),
    radial-gradient(circle at 15% 80%, rgba(34, 211, 182, 0.18) 0%, rgba(34, 211, 182, 0) 58%);
  opacity: 0.85;
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(720px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.hero-compact {
  padding-block: clamp(44px, 7vw, 60px);
}

.hero-title {
  margin: 0;
  font-size: clamp(2.2rem, 8vw, 3.4rem);
  font-weight: 700;
  line-height: 1.05;
  background: linear-gradient(120deg, rgba(233, 244, 255, 0.98) 0%, rgba(148, 197, 255, 0.9) 35%, rgba(166, 113, 255, 0.84) 65%, rgba(209, 250, 229, 0.72) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  margin: 0;
  color: var(--text-secondary);
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.15rem);
  line-height: 1.55;
}

.feature-grid,
.feature-steps {
  display: grid;
  gap: 24px;
}

.feature-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.feature-steps {
  list-style: none;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  padding: 0;
  margin: 0;
}

.card {
  --card-accent: var(--accent-teal);
  --card-accent-soft: rgba(34, 211, 182, 0.12);
  --card-cap-gradient: var(--card-cap);
  position: relative;
  border-radius: var(--card-radius);
  background: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: var(--card-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.04), inset 0 -28px 38px rgba(4, 8, 12, 0.55);
  color: var(--text-secondary);
  overflow: hidden;
  list-style: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: var(--card-cap-height);
  background: var(--card-cap-gradient);
  border-top-left-radius: var(--card-radius);
  border-top-right-radius: var(--card-radius);
}

.card::after {
  content: "";
  position: absolute;
  top: var(--card-cap-height);
  left: 1px;
  right: 1px;
  bottom: 1px;
  border-radius: calc(var(--card-radius) - 1px);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 38%);
  opacity: 0.6;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 28px 60px rgba(10, 20, 30, 0.55);
}

.card-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 100%;
  padding: calc(22px + var(--card-cap-height)) 28px 32px;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--card-accent) 0%, rgba(255, 255, 255, 0.06) 100%);
  box-shadow: 0 14px 28px rgba(8, 18, 24, 0.4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #f8fafc;
  margin-bottom: 8px;
  flex-shrink: 0;
}

.card-icon svg {
  width: 28px;
  height: 28px;
  stroke: #f8fafc;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.card-title {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-body {
  color: var(--text-secondary);
}

.card-body + .card-body {
  margin-top: 8px;
}

.card-bullets {
  margin: 0;
  padding: 0;
  list-style: none;
}

.card-bullets li {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  line-height: 1.55;
  margin: 0.35rem 0;
}

.card-bullets li::before {
  content: "→";
  flex: 0 0 auto;
  color: var(--card-accent);
  font-weight: 600;
  opacity: 0.95;
  line-height: 1.1;
}

.card-cta {
  margin-top: auto;
  font-weight: 600;
  color: var(--card-accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s ease, transform 0.2s ease;
  align-self: flex-start;
}

.card-cta::after {
  content: "→";
  font-size: 0.95rem;
  transition: transform 0.2s ease;
}

.card-cta:hover {
  color: #ffffff;
  transform: translateX(3px);
}

.card-cta:hover::after {
  transform: translateX(4px);
}

.card-cta:focus-visible {
  outline: 2px solid var(--card-accent);
  outline-offset: 3px;
}

.card[data-accent="teal"] {
  --card-accent: var(--accent-teal);
  --card-accent-soft: rgba(34, 211, 182, 0.12);
  --card-cap-gradient: linear-gradient(90deg, rgba(34, 211, 182, 0.95), rgba(96, 165, 250, 0.85));
}

.card[data-accent="purple"] {
  --card-accent: var(--accent-purple);
  --card-accent-soft: rgba(139, 92, 246, 0.12);
  --card-cap-gradient: linear-gradient(90deg, rgba(139, 92, 246, 0.95), rgba(96, 165, 250, 0.85));
}

.card[data-accent="blue"] {
  --card-accent: var(--accent-blue);
  --card-accent-soft: rgba(96, 165, 250, 0.14);
  --card-cap-gradient: linear-gradient(90deg, rgba(96, 165, 250, 0.92), rgba(148, 113, 255, 0.85));
}

.card[data-accent="rose"] {
  --card-accent: var(--accent-rose);
  --card-accent-soft: rgba(244, 114, 182, 0.16);
  --card-cap-gradient: linear-gradient(90deg, rgba(244, 114, 182, 0.95), rgba(96, 165, 250, 0.75));
}

.card[data-layout="compact"] .card-inner {
  padding: calc(16px + var(--card-cap-height)) 22px 24px;
  gap: 14px;
}

.card[data-layout="compact"] .card-title {
  font-size: 1.05rem;
}

.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(6, 12, 18, 0.72);
  padding: 64px 24px 48px;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 36px;
  align-items: center;
  margin-bottom: 18px;
}

.footer-info .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: rgba(96, 165, 250, 0.12);
  color: rgba(226, 232, 240, 0.9);
}

.footer-info .icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.footer-info .text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.footer-info .text a {
  color: inherit;
  transition: color 0.2s ease;
}

.footer-info .text a:hover {
  color: #f8fafc;
}

footer address {
  font-style: normal;
}

.footer-bottom {
  color: rgba(148, 163, 184, 0.6);
  font-size: 0.9rem;
  text-align: center;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

@media (max-width: 900px) {
  .header-title {
    display: none;
  }

  .header-inner {
    padding: 4px 14px;
  }

  .menu-panel {
    right: 18px;
  }
}

@media (max-width: 640px) {
  main {
    padding: 70px 16px 72px;
  }

  .container {
    padding-inline: 16px;
  }

  .page-shell {
    width: min(100%, calc(100% - 16px));
    gap: 72px;
  }

  .hero {
    border-radius: 22px;
  }

  .hero-title {
    font-size: clamp(1.95rem, 8vw, 2.8rem);
  }

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

  .feature-steps {
    grid-template-columns: 1fr;
  }

  .menu-panel {
    top: 60px;
    width: min(94vw, 320px);
    padding: 22px;
    border-radius: 24px;
  }

  .menu-item {
    font-size: 1rem;
  }
}

@media (min-width: 960px) {
  .feature-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}