/* ==========================================================================
   CCY4202: Ethical Hacking Labs — Base Design System
   ========================================================================== */

/* Design Tokens & Theme Variables */
:root {
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Share Tech Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  --line-height-tight: 1.25;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Layout */
  --header-height: 4rem;
  --sidebar-width: 300px;
  --toc-width: 240px;
  --content-max-width: 1100px;

  /* Transitions */
  --trans-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --trans-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --trans-bounce: 300ms cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Terminal Traffic Lights */
  --terminal-red: #ff5f56;
  --terminal-yellow: #ffbd2e;
  --terminal-green: #27c93f;
}

/* ==========================================================================
   Theme: Terminal Dark (Default - "Mr. Robot" / Hacker HUD)
   ========================================================================== */
:root,
[data-theme="dark"] {
  color-scheme: dark;

  /* Surfaces */
  --color-bg: #0a0c10;
  --color-bg-alt: #0d1117;
  --color-surface: #161b22;
  --color-surface-hover: #1f242c;
  --color-surface-active: #242b35;
  --color-border: #30363d;
  --color-border-subtle: #21262d;

  /* Typography */
  --color-text-primary: #f0f6fc;
  --color-text-secondary: #8b949e;
  --color-text-muted: #6e7681;

  /* Cybersecurity Palette */
  --color-accent: #00ff66;              /* Hacker Neon Green */
  --color-accent-soft: rgba(0, 255, 102, 0.12);
  --color-accent-border: rgba(0, 255, 102, 0.35);
  --color-accent-glow: rgba(0, 255, 102, 0.25);

  --color-cyan: #00e5ff;                /* Terminal Cyan */
  --color-cyan-soft: rgba(0, 229, 255, 0.12);
  
  --color-warn: #ffb000;                /* Matrix Amber */
  --color-warn-soft: rgba(255, 176, 0, 0.12);
  
  --color-danger: #ff4444;              /* Exploit Red */
  --color-danger-soft: rgba(255, 68, 68, 0.14);

  --color-purple: #a371f7;              /* Exploitation Purple */
  --color-purple-soft: rgba(163, 113, 247, 0.14);

  /* Code / Terminal */
  --terminal-bg: #050709;
  --terminal-header-bg: #11151c;
  --terminal-border: #21262d;
  --terminal-text: #5af78e;
  --terminal-prompt: #00e5ff;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(0, 255, 102, 0.2);
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   Theme: Classroom Light Mode (High Contrast for Projectors)
   ========================================================================== */
[data-theme="light"] {
  color-scheme: light;

  /* Surfaces */
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fa;
  --color-surface: #ffffff;
  --color-surface-hover: #f3f4f6;
  --color-surface-active: #e5e7eb;
  --color-border: #d0d7de;
  --color-border-subtle: #e1e4e8;

  /* Typography */
  --color-text-primary: #1f2328;        /* Obsidian text for deep contrast */
  --color-text-secondary: #424a53;
  --color-text-muted: #57606a;

  /* High-Contrast Accents */
  --color-accent: #0969da;              /* Cobalt blue */
  --color-accent-soft: rgba(9, 105, 218, 0.1);
  --color-accent-border: rgba(9, 105, 218, 0.35);
  --color-accent-glow: rgba(9, 105, 218, 0.15);

  --color-cyan: #0284c7;
  --color-cyan-soft: rgba(2, 132, 199, 0.1);

  --color-warn: #9a6700;
  --color-warn-soft: rgba(154, 103, 0, 0.12);

  --color-danger: #cf222e;
  --color-danger-soft: rgba(207, 34, 46, 0.1);

  --color-purple: #8250df;
  --color-purple-soft: rgba(130, 80, 223, 0.12);

  /* Code / Terminal */
  --terminal-bg: #1b1f24;
  --terminal-header-bg: #24292f;
  --terminal-border: #32383f;
  --terminal-text: #7ee787;
  --terminal-prompt: #58a6ff;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(31, 35, 40, 0.12);
  --shadow-md: 0 6px 18px rgba(31, 35, 40, 0.1);
  --shadow-glow: 0 0 12px rgba(9, 105, 218, 0.15);
  --shadow-card: 0 2px 10px rgba(31, 35, 40, 0.08);
}

/* ==========================================================================
   Accessibility Feature: Projector View Mode (.projector-mode)
   Boosts font sizes (18px+ base), boldens weights, thickens borders
   ========================================================================== */
body.projector-mode {
  --font-size-xs: 0.95rem;
  --font-size-sm: 1.05rem;
  --font-size-base: 1.18rem;            /* 18.8px base */
  --font-size-lg: 1.32rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 1.85rem;
  --font-size-3xl: 2.3rem;
  --font-size-4xl: 2.85rem;

  font-weight: 500;
}

body.projector-mode p,
body.projector-mode li,
body.projector-mode summary {
  font-size: var(--font-size-base);
  line-height: 1.7;
}

body.projector-mode h1,
body.projector-mode h2,
body.projector-mode h3 {
  font-weight: 800;
  letter-spacing: -0.01em;
}

body.projector-mode code,
body.projector-mode pre {
  font-size: 1.12rem;
  font-weight: 600;
}

body.projector-mode .terminal-window {
  border-width: 2px !important;
}

body.projector-mode .quiz-card,
body.projector-mode .lab-card,
body.projector-mode .callout {
  border-width: 2px !important;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1.5rem);
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--trans-normal), color var(--trans-normal);
}

/* Native Elements */
a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--trans-fast), text-shadow var(--trans-fast);
}

a:hover {
  text-decoration: underline;
  text-shadow: 0 0 8px var(--color-accent-glow);
}

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

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

code, kbd, samp, pre {
  font-family: var(--font-mono);
}

code {
  font-size: 0.9em;
  padding: 0.15em 0.35em;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-hover);
  color: var(--color-accent);
  border: 1px solid var(--color-border-subtle);
}

/* Focus styles (WCAG 2.2 AA) */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}