/* ============================================
   THE FALSE POSITIVE — Design System
   by vaLak | Death Note × Cybersecurity
   L's Official Color Palette
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cinzel+Decorative:wght@400;700;900&family=Cinzel:wght@400;500;600;700&family=Crimson+Pro:ital,wght@0,300;0,400;0,600;1,300;1,400&family=JetBrains+Mono:wght@300;400;500;700&display=swap');

/* ── CSS Variables — L's Palette ───────────── */
:root {
  /* ── Backgrounds ──────────────────────────── */
  /* #1A1D1A — near black (L's darkest shadow) */
  --bg-primary:    #1A1D1A;
  /* #2A2D2F — dark charcoal (panels, cards) */
  --bg-secondary:  #2A2D2F;
  --bg-tertiary:   #2A2D2F;
  /* Slightly lifted surface */
  --bg-elevated:   #323639;
  --bg-hover:      #3b4044;

  /* ── Accent — #436671 (L's teal jeans) ───── */
  --red:           #436671;
  --red-bright:    #5b8da1;
  --red-dim:       #2c4a57;
  --red-ghost:     rgba(67, 102, 113, 0.10);
  --red-glow:      rgba(67, 102, 113, 0.30);
  --red-glow-soft: rgba(67, 102, 113, 0.12);

  /* ── Text — L's beige & cool white ─────────  */
  /* #E1E9E8 — cool off-white (L's shirt) */
  --white:         #E1E9E8;
  /* #DAD3C9 — warm beige (L's skin, parchment) */
  --off-white:     #DAD3C9;
  /* #47494B — medium gray muted text */
  --silver:        #9eaaad;
  --muted:         #60696e;

  /* ── Borders ─────────────────────────────── */
  --border:        #323639;
  --border-red:    rgba(67, 102, 113, 0.35);
  --border-light:  #3d4247;

  /* Typography */
  --font-display:  'Cinzel Decorative', serif;
  --font-heading:  'Cinzel', serif;
  --font-body:     'Crimson Pro', Georgia, serif;
  --font-mono:     'JetBrains Mono', 'Courier New', monospace;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Sizing */
  --sidebar-width:    260px;
  --toc-width:        220px;
  --content-max:      760px;
  --nav-height:       56px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-mid:    250ms ease;
  --transition-slow:   400ms ease;

  /* Shadows */
  --shadow-red:    0 0 20px var(--red-glow), 0 0 60px var(--red-glow-soft);
  --shadow-card:   0 4px 24px rgba(26,29,26,0.9), 0 2px 8px rgba(67,102,113,0.08);
  --shadow-panel:  0 8px 40px rgba(26,29,26,0.95), 0 0 20px rgba(67,102,113,0.06);
}

/* ── Reset & Base ──────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--off-white);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Scrollbar ─────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--red-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--red); }

/* ── Typography ────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--white);
  line-height: 1.2;
  letter-spacing: 0.04em;
}

h1 { font-size: 2.4rem; font-weight: 700; }
h2 { font-size: 1.7rem; font-weight: 600; }
h3 { font-size: 1.3rem; font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 500; }

p { margin-bottom: 1rem; }

a {
  color: var(--red-bright);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--white); }

strong { color: var(--white); font-weight: 600; }
em { color: var(--silver); font-style: italic; }

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-elevated);
  color: var(--red-bright);
  padding: 0.15em 0.45em;
  border-radius: 3px;
  border: 1px solid var(--border);
}

pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-red);
  border-left: 3px solid var(--red);
  border-radius: 4px;
  padding: var(--space-md) var(--space-lg);
  overflow-x: auto;
  margin: var(--space-lg) 0;
  line-height: 1.6;
}

pre code {
  background: transparent;
  border: none;
  color: var(--off-white);
  padding: 0;
  font-size: 1em;
}

hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--red-dim), transparent);
  margin: var(--space-xl) 0;
}

ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: 0.25rem; }

/* ── Selection ─────────────────────────────── */
::selection {
  background: var(--red-dim);
  color: var(--white);
}

/* ── Buttons ───────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.75rem 2rem;
  border-radius: 2px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-mid);
  text-decoration: none;
}

.btn-primary {
  background: var(--red);
  color: var(--white);
  box-shadow: 0 0 0 0 var(--red-glow);
}
.btn-primary:hover {
  background: var(--red-bright);
  color: var(--white);
  box-shadow: var(--shadow-red);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--off-white);
  border: 1px solid var(--border-light);
}
.btn-ghost:hover {
  border-color: var(--red);
  color: var(--white);
  background: var(--red-ghost);
}

/* ── Callout / Alert Boxes ─────────────────── */
.callout {
  border-left: 3px solid var(--red);
  background: var(--red-ghost);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 4px 4px 0;
  margin: var(--space-lg) 0;
  font-family: var(--font-body);
}

.callout-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--red-bright);
  margin-bottom: var(--space-sm);
}

.callout-warning {
  border-color: #ff6600;
  background: rgba(255, 102, 0, 0.08);
}
.callout-warning .callout-title { color: #ff8833; }

.callout-note {
  border-color: var(--silver);
  background: rgba(170,170,170,0.06);
}
.callout-note .callout-title { color: var(--silver); }

.callout-l {
  border-color: var(--white);
  background: rgba(255,255,255,0.04);
  font-style: italic;
}
.callout-l .callout-title {
  color: var(--white);
  font-style: normal;
}

/* ── Tag / Badge ───────────────────────────── */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2em 0.6em;
  border-radius: 2px;
  border: 1px solid var(--border-red);
  color: var(--red-bright);
  background: var(--red-ghost);
}

/* ── Utility ───────────────────────────────── */
.text-red     { color: var(--red-bright); }
.text-muted   { color: var(--muted); }
.text-silver  { color: var(--silver); }
.text-mono    { font-family: var(--font-mono); }
.text-center  { text-align: center; }

.glow-red {
  text-shadow: 0 0 10px var(--red-glow), 0 0 30px var(--red-glow-soft);
}

/* ── Animations ────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-red {
  0%, 100% { box-shadow: 0 0 0 0 var(--red-glow); }
  50%       { box-shadow: 0 0 20px 4px var(--red-glow); }
}

@keyframes flicker {
  0%, 100% { opacity: 1; }
  92%       { opacity: 1; }
  93%       { opacity: 0.7; }
  94%       { opacity: 1; }
  96%       { opacity: 0.85; }
  97%       { opacity: 1; }
}

@keyframes ink-spread {
  0%   { clip-path: circle(0% at 50% 50%); opacity: 1; }
  100% { clip-path: circle(150% at 50% 50%); opacity: 0; }
}

@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.fade-in { animation: fadeIn 0.6s ease forwards; }
.flicker  { animation: flicker 8s infinite; }

/* ── Base ───────────────────────────────────── */
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 2rem);
}