:root {
  --bg: #f3f8fc;
  --bg-elev: #ffffff;
  --bg-ink: #0b1f37;
  --bg-ink-soft: #112c4d;
  --text: #10253f;
  --text-muted: #4d6078;
  --line: #d2deea;
  --teal: #0ea5a3;
  --teal-dark: #0b7f80;
  --cyan: #1d9bd1;
  --accent: #1f7ae0;
  --danger: #d14545;
  --success: #1f9d65;
  --shadow: 0 18px 40px rgba(12, 28, 53, 0.12);
}

html.dark {
  --bg: #071221;
  --bg-elev: #0c1e35;
  --bg-ink: #050d18;
  --bg-ink-soft: #0a1730;
  --text: #e8f1fb;
  --text-muted: #93aac6;
  --line: #274768;
  --teal: #2dd4bf;
  --teal-dark: #10b4a4;
  --cyan: #43b8e8;
  --accent: #60a5fa;
  --danger: #f87171;
  --success: #34d399;
  --shadow: 0 18px 42px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 10% 10%, rgba(29, 155, 209, 0.12), transparent 36%),
    radial-gradient(circle at 90% 90%, rgba(14, 165, 163, 0.14), transparent 34%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  letter-spacing: 0.01em;
}

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

.site-shell {
  width: min(1220px, 92vw);
  margin: 0 auto;
}

.nav-shell {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--line);
}

.nav-link {
  color: var(--text-muted);
  font-weight: 600;
  transition: 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--teal);
}

.glass-card {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-elev) 94%, transparent);
  box-shadow: var(--shadow);
  border-radius: 18px;
}

.hero-panel {
  background: linear-gradient(150deg, var(--bg-ink) 0%, var(--bg-ink-soft) 40%, #134566 100%);
  color: #e9f5ff;
  border-radius: 24px;
  overflow: hidden;
  position: relative;
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: -60% auto auto 55%;
  width: 540px;
  height: 540px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(45, 212, 191, 0.3), transparent 65%);
}

.metric-counter {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  background: color-mix(in srgb, var(--bg-elev) 96%, transparent);
}

.kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--teal);
  font-weight: 700;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.table-enterprise {
  width: 100%;
  border-collapse: collapse;
  min-width: 900px;
}

.table-enterprise th,
.table-enterprise td {
  padding: 0.8rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.table-enterprise th {
  background: color-mix(in srgb, var(--bg-elev) 70%, var(--bg-ink) 30%);
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  padding: 0.3rem 0.8rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.tco-progress {
  width: 100%;
  height: 10px;
  background: color-mix(in srgb, var(--bg-elev) 82%, var(--bg-ink) 18%);
  border-radius: 999px;
  overflow: hidden;
}

.tco-progress > span {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--teal), var(--cyan));
}

.fade-rise {
  animation: riseIn 0.5s ease both;
}

@keyframes riseIn {
  from {
    transform: translateY(12px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.footnote {
  color: var(--text-muted);
  font-size: 0.8rem;
}

#backToTop {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 0;
  color: white;
  background: linear-gradient(120deg, var(--teal), var(--accent));
  box-shadow: var(--shadow);
  display: none;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.blog-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  background: color-mix(in srgb, var(--bg-elev) 95%, transparent);
}

input,
select,
textarea,
button {
  font-family: inherit;
}

.form-control {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  background: color-mix(in srgb, var(--bg-elev) 95%, transparent);
  color: var(--text);
}

.btn-primary {
  border: 0;
  border-radius: 10px;
  padding: 0.7rem 1rem;
  color: white;
  font-weight: 700;
  background: linear-gradient(120deg, var(--teal), var(--accent));
}

.btn-secondary {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.7rem 1rem;
  color: var(--text);
  background: color-mix(in srgb, var(--bg-elev) 96%, transparent);
}

footer {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
}

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