:root {
  --bg: #050816;
  --bg-alt: #0d1020;
  --bg-elevated: #111827;
  --border-subtle: rgba(148, 163, 184, 0.3);
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.16);
  --accent-strong: rgba(56, 189, 248, 0.24);
  --accent-secondary: #a855f7;
  --text: #e5e7eb;
  --text-dim: #9ca3af;
  --text-muted: #6b7280;
  --radius-lg: 1.5rem;
  --radius-md: 0.9rem;
  --radius-sm: 0.6rem;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.7);
  --shadow-subtle: 0 12px 25px rgba(15, 23, 42, 0.6);
  --max-width: 1100px;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: radial-gradient(circle at top, #020617 0, #020617 35%, #020617 100%);
  color: var(--text);
  line-height: 1.5;
}

/* Layout helpers */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4.5rem 0;
}

.section-alt {
  background: linear-gradient(
      135deg,
      rgba(56, 189, 248, 0.04),
      rgba(168, 85, 247, 0.03)
    ),
    radial-gradient(circle at top, rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.95));
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: linear-gradient(
      to bottom,
      rgba(15, 23, 42, 0.9),
      rgba(15, 23, 42, 0.75),
      transparent
    );
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  width: 36px;
  height: 36px;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 600;
  letter-spacing: 0.03em;
  font-size: 0.98rem;
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  font-size: 0.9rem;
}

.nav a {
  text-decoration: none;
  color: var(--text-dim);
  transition: color 0.18s ease, transform 0.18s ease;
}

.nav a:hover {
  color: var(--accent);
  transform: translateY(-1px);
}

.nav-cta {
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.4);
  background: radial-gradient(
    circle at top left,
    rgba(56, 189, 248, 0.3),
    rgba(15, 23, 42, 0.9)
  );
  color: #e0f2fe !important;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.9);
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex-direction: column;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  background: #e5e7eb;
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* Hero */
.hero {
  padding: 3.2rem 0 4.5rem;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 55%),
    radial-gradient(circle at top right, rgba(168, 85, 247, 0.12), transparent 60%),
    radial-gradient(circle at bottom, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 1));
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2rem, 2.7vw, 2.7rem);
  line-height: 1.15;
  margin: 0 0 1rem;
}

.hero-subtitle {
  margin: 0 0 1.5rem;
  color: var(--text-dim);
  font-size: 0.98rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.3rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease,
    border-color 0.15s ease;
}

.btn-primary {
  background: radial-gradient(
    circle at top left,
    #38bdf8,
    #0ea5e9,
    #0369a1
  );
  color: white;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 50px rgba(8, 47, 73, 0.85);
}

.btn-secondary {
  background: rgba(15, 23, 42, 0.8);
  border-color: rgba(148, 163, 184, 0.6);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: rgba(56, 189, 248, 0.7);
  background: rgba(15, 23, 42, 0.95);
  transform: translateY(-1px);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill {
  font-size: 0.75rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.75);
  color: var(--text-muted);
}

/* Hero visual */
.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  width: 100%;
  max-width: 420px;
  border-radius: var(--radius-lg);
  padding: 1.15rem;
  background: radial-gradient(
      circle at top,
      rgba(148, 163, 184, 0.14),
      transparent
    ),
    linear-gradient(
      135deg,
      rgba(15, 23, 42, 0.95),
      rgba(17, 24, 39, 0.97),
      rgba(15, 23, 42, 1)
    );
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.hero-illustration {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.hero-terminal {
  margin-top: 0.4rem;
  border-radius: var(--radius-md);
  background: #020617;
  border: 1px solid rgba(15, 23, 42, 0.9);
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.78rem;
}

.term-header {
  display: flex;
  align-items: center;
  padding: 0.35rem 0.6rem;
  gap: 0.25rem;
  background: linear-gradient(to right, #020617, #030712);
  border-bottom: 1px solid rgba(15, 23, 42, 0.95);
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
}

.dot.red {
  background: #f97373;
}

.dot.yellow {
  background: #facc15;
}

.dot.green {
  background: #4ade80;
}

.term-title {
  margin-left: 0.4rem;
  color: var(--text-muted);
}

.term-body {
  margin: 0;
  padding: 0.7rem 0.8rem 0.9rem;
  background: radial-gradient(circle at top left, #020617, #020617);
  color: #e5e7eb;
  white-space: pre-wrap;
}

/* Sections */
.section h2 {
  font-size: 1.5rem;
  margin-top: 0;
  margin-bottom: 0.8rem;
}

.section-intro {
  max-width: 650px;
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 1.7rem;
}

.grid {
  display: grid;
  gap: 1.4rem;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: rgba(15, 23, 42, 0.9);
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.3);
  padding: 1.1rem 1.1rem 1.15rem;
  box-shadow: var(--shadow-subtle);
  font-size: 0.9rem;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
  font-size: 1rem;
}

.card p {
  margin: 0;
  color: var(--text-dim);
}

/* Features */
.features-grid .feature {
  background: radial-gradient(
      circle at top left,
      rgba(56, 189, 248, 0.08),
      transparent
    ),
    rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: var(--radius-md);
  padding: 1rem 1.05rem 1.1rem;
  box-shadow: var(--shadow-subtle);
}

.feature-icon {
  font-size: 1.3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  margin-bottom: 0.5rem;
  background: var(--accent-soft);
}

/* How it works */
.how-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  align-items: start;
}

.how-steps ol {
  margin: 0;
  padding-left: 1.3rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.how-steps li + li {
  margin-top: 0.7rem;
}

.how-diagram img {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.diagram-caption {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Usage */
.usage-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.4rem;
}

.usage-step h3 {
  margin-top: 0;
  font-size: 0.98rem;
}

.usage-step pre {
  margin: 0.4rem 0 0;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-md);
  background: #020617;
  border: 1px solid rgba(30, 64, 175, 0.8);
  font-size: 0.78rem;
  overflow-x: auto;
}

.usage-note {
  margin-top: 1.5rem;
  font-size: 0.86rem;
  color: var(--text-muted);
}

/* FAQ */
.faq details {
  background: rgba(15, 23, 42, 0.92);
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 0.85rem 1rem;
  margin-bottom: 0.8rem;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.93rem;
  font-weight: 500;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "▾";
  float: right;
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: transform 0.15s ease;
}

.faq details[open] summary::after {
  transform: rotate(-180deg);
}

.faq p {
  margin-top: 0.5rem;
  font-size: 0.86rem;
  color: var(--text-dim);
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  padding: 1.4rem 0 1.6rem;
  background: radial-gradient(circle at top, #020617, #020617);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-logo {
  margin-right: 0.5rem;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.footer-left,
.footer-right {
  display: flex;
  align-items: center;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .usage-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .header-inner {
    padding: 0.7rem 0;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: absolute;
    inset: 100% 0 auto;
    display: none;
    flex-direction: column;
    padding: 0.6rem 1.5rem 0.9rem;
    background: rgba(15, 23, 42, 0.98);
    border-bottom: 1px solid rgba(148, 163, 184, 0.3);
  }

  .nav.open {
    display: flex;
  }

  .nav-cta {
    margin-top: 0.3rem;
  }

  .grid-3,
  .usage-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero {
    padding-top: 2.5rem;
  }

  .hero-copy h1 {
    font-size: 1.7rem;
  }

  .card,
  .features-grid .feature,
  .faq details {
    padding: 0.9rem 0.9rem 1rem;
  }

  .usage-step pre {
    font-size: 0.76rem;
  }
}