:root {
  --bg: #0a0a0a;
  --panel: rgba(12, 12, 12, 0.78);
  --panel-strong: rgba(4, 4, 4, 0.94);
  --text: #ffffff;
  --muted: #a7a7a7;
  --soft: #6d6d6d;
  --line: rgba(255, 255, 255, 0.16);
  --accent: #0066ff;
  --cyan: #00e5ff;
  --impact: #ff2d55;
  --carbon: #1a1a1a;
  --font-sans: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;
  --ease-flow: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-cut: cubic-bezier(0.7, 0, 0.2, 1);
  --scrollbar-size: 6px;
  --scrollbar-track: rgba(255, 255, 255, 0.05);
  --scrollbar-thumb: linear-gradient(180deg, var(--accent) 0%, var(--cyan) 100%);
  --scrollbar-thumb-hover: linear-gradient(180deg, #1a7aff 0%, #4df0ff 100%);
  --scrollbar-glow: 0 0 14px rgba(0, 102, 255, 0.55);
}

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

html {
  height: 100%;
  scroll-behavior: smooth;
  background: var(--bg);
  scroll-padding-top: 92px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--scrollbar-track);
}

body {
  position: relative;
  margin: 0;
  height: 100%;
  min-height: 100%;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    var(--bg);
  background-size: 96px 96px, 96px 96px, auto;
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.55;
  letter-spacing: 0.005em;
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: -15% -15% -15% -15%;
  z-index: 0;
  background:
    radial-gradient(36% 32% at 18% 28%, rgba(0, 102, 255, 0.06), transparent 70%),
    radial-gradient(32% 28% at 82% 72%, rgba(0, 229, 255, 0.035), transparent 75%),
    radial-gradient(48% 50% at 50% 110%, rgba(0, 102, 255, 0.05), transparent 70%);
  filter: blur(20px);
  pointer-events: none;
  animation: ambientGlow 26s ease-in-out infinite;
}

*::-webkit-scrollbar {
  width: var(--scrollbar-size);
  height: var(--scrollbar-size);
}

*::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
  border-left: 1px solid rgba(255, 255, 255, 0.06);
}

*::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border: 1px solid rgba(0, 102, 255, 0.35);
  box-shadow: var(--scrollbar-glow);
  transition: background 220ms ease, box-shadow 220ms ease;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.45);
}

*::-webkit-scrollbar-corner {
  background: var(--bg);
}

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

button,
a {
  color: inherit;
}

button {
  cursor: pointer;
}

img,
video,
iframe {
  display: block;
  max-width: 100%;
}

::selection {
  background: rgba(0, 102, 255, 0.38);
  color: #fff;
}

.noise,
.scanline {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.noise {
  opacity: 0.18;
  background-image: linear-gradient(115deg, transparent, rgba(255, 255, 255, 0.04), transparent);
  mix-blend-mode: screen;
}

.scanline {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.035), transparent);
  transform: translateY(-100%);
  animation: scanline 7s linear infinite;
}

.scroll-progress {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 80;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  width: calc(var(--scroll-progress, 0) * 100%);
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  box-shadow: 0 0 22px rgba(0, 102, 255, 0.78);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.primary-btn,
.ghost-btn,
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border-radius: 0;
  border: 1px solid var(--line);
  padding: 0 18px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  line-height: 1;
  box-sizing: border-box;
  transition: transform 220ms ease, border-color 220ms ease, background 220ms ease;
}

.primary-btn {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 32px rgba(0, 102, 255, 0.32);
}

.ghost-btn,
.nav-cta {
  background: rgba(0, 0, 0, 0.18);
}

.primary-btn:hover,
.ghost-btn:hover,
.nav-cta:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 102, 255, 0.78);
}

@keyframes scanline {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(100%); }
}