/* === DESIGN TOKENS === */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing (4px base) */
  --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;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'JetBrains Mono', 'Fira Code', monospace;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
}

/* === DARK MODE (DEFAULT) === */
:root, [data-theme="dark"] {
  --color-bg: #0a0a0f;
  --color-surface: #12121a;
  --color-surface-2: #1a1a25;
  --color-surface-offset: #0f0f18;
  --color-surface-offset-2: #161622;
  --color-surface-dynamic: #1e1e2a;
  --color-divider: #2a2a3a;
  --color-border: #333348;
  --color-text: #e0e0e8;
  --color-text-muted: #8888a0;
  --color-text-faint: #555570;
  --color-text-inverse: #0a0a0f;
  --color-primary: #00ff88;
  --color-primary-hover: #00cc6e;
  --color-primary-active: #00aa5a;
  --color-primary-highlight: rgba(0,255,136,0.1);
  --color-error: #ff3366;
  --color-error-hover: #dd2255;
  --color-error-active: #bb1144;
  --color-error-highlight: rgba(255,51,102,0.1);
  --color-warning: #ffaa00;
  --color-success: #00ff88;
  --color-blue: #00d4ff;
}

/* === LIGHT MODE === */
[data-theme="light"] {
  --color-bg: #f0f0f5;
  --color-surface: #ffffff;
  --color-surface-2: #f8f8fc;
  --color-surface-offset: #e8e8f0;
  --color-surface-offset-2: #f0f0f8;
  --color-surface-dynamic: #e0e0ea;
  --color-divider: #d0d0dc;
  --color-border: #c0c0d0;
  --color-text: #1a1a2e;
  --color-text-muted: #606078;
  --color-text-faint: #9090a8;
  --color-text-inverse: #f0f0f5;
  --color-primary: #008844;
  --color-primary-hover: #006633;
  --color-primary-active: #005528;
  --color-error: #cc2255;
  --color-warning: #cc8800;
  --color-success: #008844;
  --color-blue: #0099cc;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg: #f0f0f5;
    --color-surface: #ffffff;
    --color-surface-2: #f8f8fc;
    --color-surface-offset: #e8e8f0;
    --color-surface-offset-2: #f0f0f8;
    --color-surface-dynamic: #e0e0ea;
    --color-divider: #d0d0dc;
    --color-border: #c0c0d0;
    --color-text: #1a1a2e;
    --color-text-muted: #606078;
    --color-text-faint: #9090a8;
    --color-text-inverse: #f0f0f5;
    --color-primary: #008844;
    --color-primary-hover: #006633;
    --color-primary-active: #005528;
    --color-error: #cc2255;
    --color-warning: #cc8800;
    --color-success: #008844;
    --color-blue: #0099cc;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  }
}

/* === BASE RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body, sans-serif);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: rgba(0,255,136,0.25);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@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;
  }
}

button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role="button"], [role="link"], input, textarea, select {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}