/* =============================================================
   VoltaEdge Algo by Datareco — Design System
   ============================================================= */

:root {
  /* Neutrals */
  --bg: #0A0A0B;
  --bg-1: #101012;
  --bg-2: #16161A;
  --bg-3: #1C1C21;
  --border: #23232A;
  --border-strong: #2E2E36;
  --text: #F5F5F7;
  --text-2: #B4B4BE;
  --text-3: #7A7A85;
  --text-4: #4E4E58;

  /* Accent — Volt */
  --volt: #E5FF3A;
  --volt-dim: #B8CC2E;
  --volt-glow: rgba(229, 255, 58, 0.15);

  /* Signal */
  --up: #3DDC97;
  --down: #FF5C5C;
  --info: #6EA8FF;

  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', ui-monospace, Menlo, monospace;

  /* Spacing rhythm */
  --gutter: clamp(20px, 4vw, 48px);
  --section-pad: clamp(80px, 10vw, 140px);
  --max-w: 1240px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--volt); color: #000; }

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

/* Layout */
.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: var(--section-pad) 0; position: relative; }
.section-tight { padding: clamp(48px, 6vw, 80px) 0; }

/* Type scale */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--volt);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--volt);
}

h1, h2, h3, h4 { font-weight: 500; letter-spacing: -0.03em; line-height: 1.05; }

.h-display {
  font-size: clamp(44px, 7.5vw, 96px);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.98;
}
.h-section {
  font-size: clamp(32px, 4.5vw, 56px);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.02;
  max-width: 22ch;
}
.h-3 {
  font-size: clamp(22px, 2.2vw, 28px);
  font-weight: 500;
  letter-spacing: -0.02em;
}

.body-lg {
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.5;
  color: var(--text-2);
  max-width: 60ch;
}

.mono { font-family: var(--font-mono); font-feature-settings: "tnum" 1, "zero" 1; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 20px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary { background: var(--volt); color: #000; }
.btn-primary:hover { background: #F0FF66; transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--text-3); background: var(--bg-2); }
.btn-arrow { transition: transform .2s ease; }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* Nav */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 16px 0;
  backdrop-filter: blur(16px);
  background: rgba(10, 10, 11, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.nav-left { display: flex; align-items: center; gap: 24px; }
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.015em;
}
.nav-brand-sep { color: var(--text-4); font-weight: 300; }
.nav-brand-parent { color: var(--text-3); font-size: 12.5px; font-family: var(--font-mono); }
.nav-brand-product { color: var(--text); display: flex; align-items: center; gap: 6px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  font-size: 13.5px;
  color: var(--text-3);
  transition: color .15s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-cta { display: flex; gap: 10px; align-items: center; }

/* Card */
.card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  transition: border-color .2s ease;
}
.card:hover { border-color: var(--border-strong); }

/* Divider */
.hr {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border) 20%, var(--border) 80%, transparent);
  border: 0;
}

/* Grain / dot bg */
.dot-bg {
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: 0 0;
}

/* Utility */
.txt-2 { color: var(--text-2); }
.txt-3 { color: var(--text-3); }
.txt-volt { color: var(--volt); }
.txt-up { color: var(--up); }
.txt-down { color: var(--down); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 0.02em;
}
.pill-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--up);
  box-shadow: 0 0 8px var(--up);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Focus */
*:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Variation switcher */
.variant-switch {
  position: fixed;
  bottom: 20px; right: 20px;
  z-index: 200;
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
  border-radius: 100px;
  padding: 5px;
  display: flex;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}
.variant-switch a {
  padding: 8px 14px;
  border-radius: 100px;
  color: var(--text-3);
  transition: all .15s ease;
  letter-spacing: 0.02em;
}
.variant-switch a.active {
  background: var(--volt);
  color: #000;
}
.variant-switch a:not(.active):hover { color: var(--text); }

/* Scroll animations helper */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

/* Mobile */
@media (max-width: 800px) {
  .nav-links { display: none; }
}