:root {
  --bg-main: #050509;
  --bg-panel: #141420;
  --border-subtle: #2a2a3d;
  --border-light: rgba(148, 163, 184, 0.25);
  --accent: #4f9cff;
  --accent-2: #93c5fd;
  --text-main: #f5f5f7;
  --text-muted: #9ca3af;
  --radius-lg: 12px;
  --radius-md: 8px;
  --shadow-soft: 0 18px 45px rgba(0,0,0,0.65);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top, #111827 0, #020617 40%, #000 100%);
  color: var(--text-main);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
}

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

.wrap { width: min(1120px, 92%); margin: 0 auto; }

/* Top Navigation */
.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: linear-gradient(180deg, rgba(5, 5, 9, 0.98), rgba(5, 5, 9, 0.92));
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.03em;
  font-size: 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.links { display: flex; gap: 18px; color: var(--text-muted); }
.links a:hover { color: var(--text-main); }
.actions { display: flex; gap: 10px; }

/* Hero Section */
.hero { padding: 64px 0 30px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 22px;
  align-items: start;
}

@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; }
  .links { display: none; }
}

h1 {
  margin: 0 0 12px;
  font-size: 48px;
  line-height: 1.04;
  letter-spacing: -0.6px;
  font-weight: 800;
}

h2 {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 700;
}

.lead {
  margin: 0;
  color: var(--text-muted);
  font-size: 15.5px;
  line-height: 1.65;
  max-width: 62ch;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  color: var(--text-main);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease-out;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.45);
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--border-subtle);
  box-shadow: none;
}

.btn-ghost:hover {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(15, 23, 42, 0.95));
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.2);
}

.btn-wide { width: 100%; margin-top: 12px; }

.cta { display: flex; gap: 10px; margin: 18px 0 16px; flex-wrap: wrap; }

/* Trust indicators */
.trust {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 18px;
}

.trust-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  display: inline-block;
  box-shadow: 0 0 8px var(--accent);
}

.trust-sep { opacity: 0.55; }
.trust-strong { color: var(--text-main); font-weight: 800; }

/* Panels */
.panel {
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 56%),
              radial-gradient(circle at bottom right, rgba(129, 140, 248, 0.09), transparent 60%),
              var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.7);
  padding: 16px;
}

.panel-head {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 12px;
  margin-bottom: 12px;
}

.panel-title {
  font-weight: 800;
  font-size: 18px;
  color: var(--text-main);
}

.panel-sub {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 4px;
}

.panel-note {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 10px;
  text-align: center;
}

/* Form elements */
.lbl {
  display: block;
  font-size: 11px;
  color: var(--accent-2);
  margin: 10px 0 6px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.field {
  width: 100%;
  padding: 11px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(2, 6, 23, 0.9);
  color: var(--text-main);
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s ease-out, box-shadow 0.15s ease-out;
}

.field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(79, 156, 255, 0.25);
}

/* Sections */
.section {
  padding: 48px 0;
  border-top: 1px solid var(--border-subtle);
}

.section-head { margin-bottom: 16px; }
.section-head h2 { margin: 0 0 6px; }
.section-head p { margin: 0; color: var(--text-muted); }

/* Calculator Cards Grid */
.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

@media (max-width: 920px) {
  .grid3 { grid-template-columns: 1fr; }
}

.card {
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 50%),
              var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  transition: all 0.15s ease-out;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.2);
}

.card-title {
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-main);
}

.card-sub {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.6;
  flex: 1;
}

.pill {
  display: inline-block;
  margin-top: 12px;
  padding: 6px 12px;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  color: var(--accent-2);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  align-self: flex-start;
}

.card:hover .pill {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.3), rgba(79, 70, 229, 0.3));
  border-color: var(--accent);
}

/* Split layout */
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 16px;
  align-items: start;
}

@media (max-width: 920px) {
  .split { grid-template-columns: 1fr; }
}

.mini {
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 50%),
              var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 14px;
}

.mini-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 13px;
}

.mini-row:first-child { border-top: 0; }

.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

/* Footer */
.foot {
  padding: 22px 0;
  border-top: 1px solid var(--border-subtle);
}

.foot-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.foot-links { display: flex; gap: 14px; color: var(--text-muted); }
.foot-links a:hover { color: var(--text-main); }
.muted { color: var(--text-muted); font-size: 12px; }