:root {
  --bg: #07131e;
  --panel: rgba(11, 24, 38, 0.76);
  --line: rgba(156, 186, 212, 0.22);
  --text: #f2f7fb;
  --muted: #9cbad4;
  --accent: #2ed66f;
  --accent-2: #1db7a4;
  --accent-dark: #0d7e56;
  --button-text: #021109;
  --ghost-bg: rgba(12, 29, 46, 0.68);
}

:root[data-theme="light"] {
  --bg: #edf4fb;
  --panel: rgba(255, 255, 255, 0.84);
  --line: rgba(46, 90, 120, 0.2);
  --text: #0f2a3c;
  --muted: #46667d;
  --accent: #0fbe62;
  --accent-2: #1e9caa;
  --accent-dark: #0c7e56;
  --button-text: #ffffff;
  --ghost-bg: rgba(230, 241, 250, 0.82);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Avenir Next", "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--text);
  background: var(--bg);
}

a {
  color: inherit;
}

.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 600px at 8% -12%, rgba(46, 214, 111, 0.26), transparent 65%),
    radial-gradient(900px 550px at 104% 0%, rgba(29, 183, 164, 0.24), transparent 62%),
    linear-gradient(160deg, #06111b 0%, #081a2a 50%, #0b1420 100%);
}

:root[data-theme="light"] .bg-layer {
  background:
    radial-gradient(1200px 600px at 8% -12%, rgba(46, 214, 111, 0.18), transparent 65%),
    radial-gradient(900px 550px at 104% 0%, rgba(29, 183, 164, 0.14), transparent 62%),
    linear-gradient(160deg, #f6fbff 0%, #eef6fd 46%, #e4f0fb 100%);
}

.shell {
  width: min(1040px, calc(100% - 2rem));
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  text-decoration: none;
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
}

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

.right-controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.control-btn,
.control-select {
  border: 1px solid var(--line);
  background: var(--ghost-bg);
  color: var(--text);
  border-radius: 10px;
  padding: 0.5rem 0.75rem;
  font-weight: 600;
  font-size: 0.92rem;
}

.control-btn {
  cursor: pointer;
  min-width: 128px;
}

.control-select {
  cursor: pointer;
}

.hero,
.content {
  margin-top: 1rem;
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  backdrop-filter: blur(8px);
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
}

h1 {
  margin: 0.5rem 0 0;
  line-height: 1.12;
  font-size: clamp(2rem, 4.8vw, 3.1rem);
}

h2 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--muted);
  max-width: 62ch;
  line-height: 1.6;
}

.cta-row {
  margin-top: 1.4rem;
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 700;
  padding: 0.72rem 1.1rem;
  border: 1px solid transparent;
}

.btn-primary {
  color: var(--button-text);
  background: linear-gradient(90deg, var(--accent) 0%, #7bf0ab 100%);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: var(--ghost-bg);
}

.grid {
  margin-top: 1rem;
  margin-bottom: 2rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  padding: 1.2rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(10, 27, 43, 0.75);
}

:root[data-theme="light"] .card {
  background: rgba(255, 255, 255, 0.9);
}

.card p {
  color: var(--muted);
  line-height: 1.5;
}

.link {
  text-decoration: none;
  color: #8ef6bc;
  font-weight: 700;
}

:root[data-theme="light"] .link {
  color: #0b8f5a;
}

.link:hover {
  color: #c8ffe2;
}

:root[data-theme="light"] .link:hover {
  color: #11a365;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
}

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

.footer {
  padding: 0.8rem 0 2rem;
}

.list {
  display: grid;
  gap: 0.8rem;
  padding-left: 1.2rem;
}

.list li {
  color: var(--muted);
  line-height: 1.5;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 960px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .right-controls {
    width: 100%;
    justify-content: flex-start;
  }
}

@media (max-width: 860px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .content {
    padding: 1.2rem;
  }
}