/* ========== NR-INTERACTIONS — Dark / Cyber design system ========== */

:root {
  /* Surface */
  --bg-0: #07080b;
  --bg-1: #0c0e14;
  --bg-2: #11141c;
  --bg-3: #181c27;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.18);

  /* Type */
  --fg-0: #f4f5f8;
  --fg-1: #c8ccd6;
  --fg-2: #8a8f9e;
  --fg-3: #555b6c;

  /* Accent (tweakable) */
  --accent: #b6ff3c;          /* electric lime */
  --accent-soft: rgba(182, 255, 60, 0.14);
  --accent-glow: rgba(182, 255, 60, 0.45);
  --accent-fg: #07080b;

  /* Secondary accent */
  --accent-2: #5cf7ff;        /* cyan */

  /* Status */
  --ok: #6dffae;
  --warn: #ffcb47;
  --err: #ff6b6b;

  /* Typography */
  --ff-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --ff-body: "Inter", system-ui, sans-serif;
  --ff-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;

  /* Radius / motion */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 18px;
  --r-xl: 28px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
  background: var(--bg-0);
  color: var(--fg-0);
  font-family: var(--ff-body);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(182,255,60,0.08), transparent 60%),
    radial-gradient(900px 500px at 90% 30%, rgba(92,247,255,0.05), transparent 60%),
    var(--bg-0);
  overflow-x: hidden;
}

::selection { background: var(--accent); color: var(--accent-fg); }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* Mono labels */
.mono {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-2);
}
.mono--accent { color: var(--accent); }

/* Section scaffold */
.section {
  position: relative;
  padding: 120px 0;
  border-top: 1px solid var(--line);
}
.section--no-border { border-top: 0; }
.container {
  width: min(1240px, 92vw);
  margin: 0 auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-2);
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.02);
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.h1 {
  font-family: var(--ff-display);
  font-weight: 500;
  font-size: clamp(48px, 8vw, 120px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 0;
  text-wrap: balance;
}
.h2 {
  font-family: var(--ff-display);
  font-weight: 500;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin: 0;
  text-wrap: balance;
}
.h3 {
  font-family: var(--ff-display);
  font-weight: 500;
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0;
}
.lead {
  font-size: clamp(16px, 1.4vw, 20px);
  line-height: 1.55;
  color: var(--fg-1);
  max-width: 60ch;
  text-wrap: pretty;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-family: var(--ff-body);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background: var(--accent);
  color: var(--accent-fg);
  box-shadow: 0 8px 30px var(--accent-glow);
}
.btn--primary:hover {
  box-shadow: 0 12px 40px var(--accent-glow);
}
.btn--ghost {
  background: transparent;
  color: var(--fg-0);
  border-color: var(--line-strong);
}
.btn--ghost:hover {
  border-color: var(--fg-0);
}
.btn--lg { height: 56px; padding: 0 28px; font-size: 16px; }

.btn .arrow {
  width: 16px; height: 16px;
  display: inline-flex; align-items: center; justify-content: center;
  transition: transform 0.25s var(--ease);
}
.btn:hover .arrow { transform: translateX(3px); }

/* Cards */
.card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: border-color 0.25s var(--ease), transform 0.3s var(--ease), background 0.3s var(--ease);
}
.card:hover {
  border-color: var(--line-strong);
}

/* Grid noise / scanline overlay */
.grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 80%);
}

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
.reveal--delay-1 { transition-delay: 0.08s; }
.reveal--delay-2 { transition-delay: 0.16s; }
.reveal--delay-3 { transition-delay: 0.24s; }
.reveal--delay-4 { transition-delay: 0.32s; }

/* Marquee */
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* Gradient text accent */
.accent-text { color: var(--accent); }
.italic { font-style: italic; font-family: "Instrument Serif", "Times New Roman", serif; font-weight: 400; }

/* Form */
.input, .textarea {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--fg-0);
  font-family: var(--ff-body);
  font-size: 15px;
  padding: 14px 16px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.input:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-3);
}
.textarea { min-height: 120px; resize: vertical; font-family: inherit; }
.label {
  display: block;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-2);
  margin-bottom: 8px;
}

/* Scroll strip */
.scroll-strip {
  display: flex;
  gap: 60px;
  white-space: nowrap;
  animation: marquee 40s linear infinite;
}
.scroll-strip > * { flex: 0 0 auto; }