/* ============================================================
   CodingClub — Midnight Workshop Design System v2
   tokens.css
   Import this file once at the root of your project.
   Never use raw hex values in component files — always
   reference these custom properties by name.
   ============================================================ */

:root {

  /* ── Backgrounds ───────────────────────────────────────── */
  --color-void:    #0D1117; /* Main page background          */
  --color-panel:   #161B22; /* Cards and panels              */
  --color-surface: #21262D; /* Elevated elements, code blocks */

  /* ── Text ──────────────────────────────────────────────── */
  --color-text-primary: #E6EDF3; /* Headings                 */
  --color-text-body:    #C9D1D9; /* Body copy                */
  --color-text-muted:   #8B949E; /* Labels, meta, secondary  */
  --color-text-subtle:  #484F58; /* Placeholder text         */

  /* ── Borders ───────────────────────────────────────────── */
  --color-border-default: #30363D; /* Cards, inputs          */
  --color-border-subtle:  #21262D; /* Dividers               */

  /* ── Accent palette ────────────────────────────────────── */
  --color-spark:     #9966FF; /* Primary · links · focus     */
  --color-spark-dim: #2D1B69; /* Purple tints and fills      */
  --color-bit:       #DA1F3D; /* micro:bit red · energy      */
  --color-connector: #D4AA00; /* Edge connector gold         */
  --color-circuit:   #4CBFE6; /* Secondary · teal            */
  --color-go:        #3FB950; /* Success · enrol CTA         */
  --color-amber:     #D29922; /* Warning                     */
  --color-ember:     #F85149; /* Error · danger              */

  /* ── MakeCode block palette ────────────────────────────── */
  /* Use for labelling course topics and curriculum content   */
  --color-block-basic:     #1E90FF;
  --color-block-input:     #D4AA00;
  --color-block-variables: #9966FF;
  --color-block-math:      #3FB950;
  --color-block-logic:     #4CBFE6;
  --color-block-radio:     #E30FC0;
  --color-block-music:     #DF6E2B;
  --color-block-led:       #DA1F3D;

  /* ── Spacing scale (base unit: 4px) ────────────────────── */
  --space-xs:  4px;  /* Tight inline gaps                    */
  --space-sm:  8px;  /* Icon-to-label                        */
  --space-md:  12px; /* List item gaps                       */
  --space-lg:  16px; /* Card internal padding                */
  --space-xl:  24px; /* Section padding · card gaps          */
  --space-2xl: 32px; /* Between components                   */
  --space-3xl: 48px; /* Major layout gaps · poster safe zone */
  --space-4xl: 64px; /* Hero padding · page margins          */

  /* ── Border radius ─────────────────────────────────────── */
  --radius-sm:   4px;    /* Badges, small chips               */
  --radius-md:   8px;    /* Buttons, inputs                   */
  --radius-lg:   12px;   /* Cards                             */
  --radius-xl:   16px;   /* Modals, large containers          */
  --radius-pill: 9999px; /* Tags, pills                       */

  /* ── Typography ────────────────────────────────────────── */
  --font-heading: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* Type scale */
  --text-poster:  clamp(64px, 10vw, 96px);
  --text-display: clamp(36px, 6vw, 48px);
  --text-h1:      clamp(26px, 4vw, 32px);
  --text-h2:      24px;
  --text-h3:      18px;
  --text-body:    16px;
  --text-small:   13px;
  --text-eyebrow: 11px;

  /* Line heights */
  --leading-tight:  1.1;
  --leading-snug:   1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;

  /* Letter spacing */
  --tracking-tight:   -0.02em;
  --tracking-snug:    -0.01em;
  --tracking-normal:  0;
  --tracking-wide:    0.06em;
  --tracking-wider:   0.08em;
}

/* ── Base styles ─────────────────────────────────────────── */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background-color: var(--color-void);
  color: var(--color-text-body);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-relaxed);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
}

h1 { font-size: var(--text-h1); letter-spacing: var(--tracking-snug); font-weight: 700; }
h2 { font-size: var(--text-h2); font-weight: 600; }
h3 { font-size: var(--text-h3); font-weight: 600; }

a { color: var(--color-spark); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  color: var(--color-spark);
  background: var(--color-panel);
  border-radius: var(--radius-sm);
}

code { padding: 2px 6px; }

pre {
  padding: var(--space-xl);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

/* ── Utility classes ─────────────────────────────────────── */

.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 500;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.15s ease;
  border-radius: var(--radius-md);
}
.btn:hover { opacity: 0.88; }
.btn:active { opacity: 0.75; }

.btn-sm  { font-size: 12px; padding: 5px 12px; border-radius: var(--radius-sm); }
.btn-md  { font-size: 13px; padding: 8px 16px; }
.btn-lg  { font-size: 15px; padding: 12px 24px; border-radius: 10px; }

.btn-primary     { background: var(--color-spark);   color: #fff; }
.btn-success     { background: var(--color-go);       color: var(--color-void); }
.btn-energy      { background: var(--color-bit);      color: #fff; }
.btn-secondary   { background: transparent; color: var(--color-spark); border: 1px solid var(--color-border-default); }
.btn-outline     { background: transparent; color: var(--color-text-primary); border: 1px solid var(--color-border-default); }
.btn-ghost       { background: transparent; color: var(--color-text-body); }
.btn-destructive { background: var(--color-ember);    color: #fff; }

/* Cards */
.card {
  background: var(--color-panel);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}
.badge-spark   { background: rgba(153,102,255,0.15); color: var(--color-spark); }
.badge-bit     { background: rgba(218, 31, 61,0.15); color: var(--color-bit); }
.badge-go      { background: rgba( 63,185, 80,0.15); color: var(--color-go); }
.badge-circuit { background: rgba( 76,191,230,0.15); color: var(--color-circuit); }
.badge-amber   { background: rgba(210,153, 34,0.15); color: var(--color-amber); }
.badge-muted   { background: var(--color-surface);   color: var(--color-text-muted); }

/* LED dot matrix motif */
.led-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 3px;
  width: fit-content;
}
.led {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-surface);
}
.led.on { background: var(--color-bit); }

/* Eyebrow label */
.eyebrow {
  font-size: var(--text-eyebrow);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* Form inputs */
.input {
  background: var(--color-panel);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-body);
  padding: 10px 14px;
  width: 100%;
  outline: none;
  transition: border-color 0.15s ease;
}
.input:focus { border-color: var(--color-spark); }
.input::placeholder { color: var(--color-text-subtle); }

/* Progress bar */
.progress-track {
  background: var(--color-surface);
  height: 6px;
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: var(--radius-pill);
  background: var(--color-spark);
}