/* ═══════════════════════════════════════════════════════════
   SENTINEL AI · base.css
   Design tokens, reset, typography, layout primitives
   ═══════════════════════════════════════════════════════════ */

/* ─── TOKENS ─────────────────────────────────────────────── */
:root {
  /* Surfaces */
  --c-void:      #04060D;
  --c-base:      #070A14;
  --c-surface:   #0A0F1E;
  --c-raised:    #0E1524;
  --c-card:      #111929;
  --c-overlay:   #161E30;

  /* Brand */
  --c-indigo:        #6366F1;
  --c-indigo-light:  #818CF8;
  --c-indigo-dim:    rgba(99,102,241,0.12);
  --c-indigo-glow:   rgba(99,102,241,0.35);
  --c-indigo-border: rgba(99,102,241,0.22);

  --c-sky:       #38BDF8;
  --c-sky-dim:   rgba(56,189,248,0.10);

  --c-violet:    #A78BFA;
  --c-emerald:   #34D399;
  --c-emerald-dim: rgba(52,211,153,0.10);

  /* Semantic */
  --c-danger:     #F43F5E;
  --c-danger-dim: rgba(244,63,94,0.12);
  --c-danger-border: rgba(244,63,94,0.28);

  --c-warn:       #F59E0B;
  --c-warn-dim:   rgba(245,158,11,0.10);

  --c-safe:       #10B981;
  --c-safe-dim:   rgba(16,185,129,0.10);
  --c-safe-border: rgba(16,185,129,0.25);

  /* Text */
  --t-1: #F0F4FF;
  --t-2: #8B9EC9;
  --t-3: #44567A;
  --t-4: #2A3654;

  /* Borders */
  --b-subtle:  rgba(255,255,255,0.05);
  --b-dim:     rgba(99,102,241,0.14);
  --b-mid:     rgba(99,102,241,0.28);
  --b-bright:  rgba(99,102,241,0.55);

  /* Radius */
  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 32px;
  --r-2xl: 48px;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(0,0,0,0.4), 0 8px 32px rgba(0,0,0,0.2);
  --shadow-raised: 0 4px 16px rgba(0,0,0,0.5), 0 24px 64px rgba(0,0,0,0.3);
  --shadow-glow-indigo: 0 0 40px rgba(99,102,241,0.3), 0 0 80px rgba(99,102,241,0.1);
  --shadow-glow-danger: 0 0 32px rgba(244,63,94,0.3);
  --shadow-glow-safe:   0 0 32px rgba(16,185,129,0.25);

  /* Neon — intensified glow layer */
  --neon-indigo:  0 0 8px rgba(99,102,241,0.6), 0 0 24px rgba(99,102,241,0.4), 0 0 48px rgba(99,102,241,0.2);
  --neon-sky:     0 0 8px rgba(56,189,248,0.6), 0 0 24px rgba(56,189,248,0.4);
  --neon-danger:  0 0 8px rgba(244,63,94,0.7), 0 0 24px rgba(244,63,94,0.45), 0 0 48px rgba(244,63,94,0.2);
  --neon-text-indigo: 0 0 12px rgba(129,140,248,0.7), 0 0 30px rgba(99,102,241,0.4);
  --neon-text-sky:    0 0 12px rgba(56,189,248,0.7), 0 0 30px rgba(56,189,248,0.4);

  /* Easing */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out:    cubic-bezier(0.16, 1, 0.30, 1);
  --ease-in-out: cubic-bezier(0.37, 0, 0.63, 1);

  /* Typography scale */
  --text-xs:   11px;
  --text-sm:   13px;
  --text-base: 15px;
  --text-md:   17px;
  --text-lg:   20px;
  --text-xl:   24px;
  --text-2xl:  32px;
  --text-3xl:  44px;
  --text-4xl:  60px;
  --text-5xl:  80px;

  /* Spacing */
  --space-section: 96px;
}

/* ─── RESET ──────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0; padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--t-1);
  background: var(--c-void);
  overflow-x: hidden;
  min-height: 100dvh;
}
img, video, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; border: none; background: none; }
a { color: inherit; text-decoration: none; }
input, textarea, select { font: inherit; }

/* ─── TYPOGRAPHY ─────────────────────────────────────────── */
.font-mono { font-family: 'JetBrains Mono', 'Fira Code', monospace; }

.display-xl {
  font-size: clamp(44px, 7vw, var(--text-5xl));
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 0.95;
}
.display-lg {
  font-size: clamp(36px, 5vw, var(--text-4xl));
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.0;
}
.display-md {
  font-size: clamp(28px, 4vw, var(--text-3xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.title-lg {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.title-md {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.015em;
}
.body-lg { font-size: var(--text-md); line-height: 1.75; color: var(--t-2); }
.body-md { font-size: var(--text-base); line-height: 1.7; color: var(--t-2); }
.body-sm { font-size: var(--text-sm); line-height: 1.6; color: var(--t-2); }

.label-upper {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
}

/* Gradient text */
.text-gradient {
  background: linear-gradient(120deg, var(--c-indigo-light) 0%, var(--c-sky) 45%, var(--c-emerald) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gradient-danger {
  background: linear-gradient(120deg, #F87171 0%, var(--c-danger) 50%, #FB923C 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── LAYOUT ─────────────────────────────────────────────── */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}
.container-sm {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 32px;
}
.section {
  padding: var(--space-section) 0;
}

/* Grid */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* Flex utilities */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-4 { gap: 4px; } .gap-8 { gap: 8px; } .gap-12 { gap: 12px; }
.gap-16 { gap: 16px; } .gap-24 { gap: 24px; } .gap-32 { gap: 32px; }

/* ─── SCROLLBAR ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--c-base); }
::-webkit-scrollbar-thumb { background: var(--c-indigo-border); border-radius: 100px; }
::-webkit-scrollbar-thumb:hover { background: var(--b-mid); }

/* ─── SELECTION ──────────────────────────────────────────── */
::selection { background: rgba(99,102,241,0.3); color: var(--t-1); }

/* ─── FOCUS ──────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--c-indigo);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ─── NOISE TEXTURE ──────────────────────────────────────── */
.noise {
  position: relative;
}
.noise::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
}

/* ─── AMBIENT BG ─────────────────────────────────────────── */
.ambient-bg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
}
.ambient-mesh {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 10% -10%, rgba(99,102,241,0.09) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 110%, rgba(56,189,248,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(167,139,250,0.04) 0%, transparent 60%);
}
.ambient-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .container-sm { padding: 0 24px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --space-section: 64px; }
  .container { padding: 0 16px; }
  .container-sm { padding: 0 16px; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}