/* Forge UI — MIT License — https://github.com/jlogan839-forge/forge-ui */

/**
 * Forge UI Kit - Core Stylesheet
 * Version: 1.2.0
 *
 * Layers:
 *   1. Forge brand tokens  - color palette, typography, radii
 *   2. Semantic aliases    - maps brand tokens to component roles
 *   3. Base reset
 *   4. Components          - button, input, select, textarea, toggle,
 *                            checkbox/radio, badge, alert, card, modal
 *   5. Site components     - nav, hero, features, stats, codeblock, footer
 *   6. Surface utilities   - forge-surface-dark/light/accent (contrast-safe)
 *   7. Spacing & layout utilities
 *   8. Reduced motion
 *
 * Usage:
 *   <link rel="stylesheet" href="forge-ui-kit.css">
 *   <script src="forge-ui-kit.js"></script>
 *
 * No build step. No framework. Works with any backend.
 */

/* --------------------------------------------------------------------
   1. FORGE BRAND TOKENS
   -------------------------------------------------------------------- */
:root {

  /* --- Neutral scale (iron to off-white) --- */
  --forge-black:     #1a1917;
  --forge-charcoal:  #2c2a27;
  --forge-iron:      #4a4844;
  --forge-ash:       #787470;
  --forge-stone:     #b8b5b0;
  --forge-chalk:     #e2dfd9;
  --forge-offwhite:  #f5f3ee;
  --forge-white:     #ffffff;

  /* --- Accent scale (forge red / ember) --- */
  --forge-deep:      #7a1e05;
  --forge-red:       #c8410a;
  --forge-ember:     #e0612a;
  --forge-glow:      #f08050;
  --forge-blush:     #fad4c0;
  --forge-tint:      #fef0e8;

  /* --- Typography --- */
  --forge-font-display: "Fraunces", "DM Serif Display", Georgia, serif;
  --forge-font-body:    "DM Sans", "Geist", system-ui, -apple-system, sans-serif;
  --forge-font-mono:    "Geist Mono", "SFMono-Regular", Consolas, monospace;

  /* --- Radii --- */
  --forge-radius-sm:  4px;
  --forge-radius-md:  8px;
  --forge-radius-lg:  12px;
  --forge-radius-xl:  16px;
  --forge-radius-pill: 100px;

  /* --- Spacing scale --- */
  --forge-space-1:  4px;
  --forge-space-2:  8px;
  --forge-space-3:  12px;
  --forge-space-4:  16px;
  --forge-space-5:  20px;
  --forge-space-6:  24px;
  --forge-space-8:  32px;
  --forge-space-10: 40px;
  --forge-space-12: 48px;

  /* --- Transitions --- */
  --forge-transition: 140ms ease;
}


/* -----------------------------------
   2. SEMANTIC ALIASES — Light mode
   Maps brand tokens → component roles.
   Override these to re-theme without touching components.
   ----------------------------------- */
:root {
  /* Backgrounds */
  --color-background-primary:   var(--forge-white);
  --color-background-secondary: var(--forge-offwhite);
  --color-background-tertiary:  var(--forge-chalk);
  --color-background-info:      #e6f1fb;
  --color-background-success:   #eaf3de;
  --color-background-warning:   var(--forge-tint);
  --color-background-danger:    #fcebeb;
  --color-background-accent:    var(--forge-tint);

  /* Text */
  --color-text-primary:   var(--forge-black);
  --color-text-secondary: var(--forge-iron);
  --color-text-tertiary:  var(--forge-ash);
  --color-text-info:      #185fa5;
  --color-text-success:   #3b6d11;
  --color-text-warning:   var(--forge-deep);
  --color-text-danger:    #a32d2d;
  --color-text-accent:    var(--forge-red);

  /* Borders */
  --color-border-tertiary:  rgba(26, 25, 23, 0.10);
  --color-border-secondary: rgba(26, 25, 23, 0.18);
  --color-border-primary:   rgba(26, 25, 23, 0.28);
  --color-border-accent:    var(--forge-ember);
  --color-border-info:      #85b7eb;
  --color-border-success:   #97c459;
  --color-border-warning:   var(--forge-glow);
  --color-border-danger:    #f09595;

  /* Typography aliases */
  --ui-font:    var(--forge-font-body);
  --ui-mono:    var(--forge-font-mono);
  --font-sans:  var(--forge-font-body);
  --font-serif: var(--forge-font-display);
  --font-mono:  var(--forge-font-mono);

  /* Radius aliases */
  --ui-radius-sm: var(--forge-radius-sm);
  --ui-radius-md: var(--forge-radius-md);
  --ui-radius-lg: var(--forge-radius-lg);
  --ui-radius-xl: var(--forge-radius-xl);
  --border-radius-md: var(--forge-radius-md);
  --border-radius-lg: var(--forge-radius-lg);
  --border-radius-xl: var(--forge-radius-xl);

  /* Internal shorthand */
  --ui-transition: var(--forge-transition);
  --c-bg:      var(--color-background-primary);
  --c-bg2:     var(--color-background-secondary);
  --c-bg3:     var(--color-background-tertiary);
  --c-text:    var(--color-text-primary);
  --c-text2:   var(--color-text-secondary);
  --c-text3:   var(--color-text-tertiary);
  --c-border:  var(--color-border-tertiary);
  --c-border2: var(--color-border-secondary);
  --c-border3: var(--color-border-primary);
  --c-accent:  var(--forge-red);
  --c-info:    var(--color-text-info);
  --c-success: var(--color-text-success);
  --c-warn:    var(--color-text-warning);
  --c-danger:  var(--color-text-danger);
  --c-bg-info:    var(--color-background-info);
  --c-bg-success: var(--color-background-success);
  --c-bg-warn:    var(--color-background-warning);
  --c-bg-danger:  var(--color-background-danger);
  --c-bg-accent:  var(--color-background-accent);
}

/* Dark mode overrides */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background-primary:   var(--forge-charcoal);
    --color-background-secondary: var(--forge-iron);
    --color-background-tertiary:  var(--forge-black);
    --color-background-info:      #042c53;
    --color-background-success:   #173404;
    --color-background-warning:   var(--forge-deep);
    --color-background-danger:    #501313;
    --color-background-accent:    var(--forge-deep);

    --color-text-primary:   var(--forge-offwhite);
    --color-text-secondary: var(--forge-chalk);
    --color-text-tertiary:  var(--forge-stone);
    --color-text-info:      #85b7eb;
    --color-text-success:   #97c459;
    --color-text-warning:   var(--forge-glow);
    --color-text-danger:    #f09595;
    --color-text-accent:    var(--forge-ember);

    --color-border-tertiary:  rgba(245, 243, 238, 0.10);
    --color-border-secondary: rgba(245, 243, 238, 0.18);
    --color-border-primary:   rgba(245, 243, 238, 0.28);
    --color-border-accent:    var(--forge-red);
  }
}


/* --------------------------------------------------------------------
   3. BASE RESET
   -------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--ui-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background-color: var(--c-bg3);
  margin: 0;
}


/* --------------------------------------------------------------------
   4. TYPOGRAPHY HELPERS
   -------------------------------------------------------------------- */

.forge-display {
  font-family: var(--forge-font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--c-text);
}

.forge-display-lg { font-size: clamp(36px, 6vw, 64px); }
.forge-display-md { font-size: clamp(28px, 4vw, 44px); }
.forge-display-sm { font-size: clamp(22px, 3vw, 32px); }

.forge-heading {
  font-family: var(--forge-font-body);
  font-weight: 500;
  line-height: 1.3;
  color: var(--c-text);
}

.forge-body {
  font-family: var(--forge-font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text2);
}

.forge-caption {
  font-family: var(--forge-font-body);
  font-size: 13px;
  color: var(--c-text3);
}

.forge-code {
  font-family: var(--forge-font-mono);
  font-size: 13px;
  background: var(--c-bg2);
  border: 0.5px solid var(--c-border);
  padding: 2px 6px;
  border-radius: var(--ui-radius-sm);
  color: var(--c-text);
}

.forge-label {
  font-family: var(--forge-font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--c-text3);
}

/* Accent color helpers */
.forge-accent         { color: var(--forge-red); }
.forge-accent-bg      { background: var(--forge-red); color: var(--forge-offwhite); }
.forge-accent-subtle  { background: var(--forge-tint); color: var(--forge-deep); }


/* --------------------------------------------------------------------
   5. LAYOUT HELPERS
   -------------------------------------------------------------------- */

.forge-container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--forge-space-6);
}

.forge-container-sm {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--forge-space-6);
}

.forge-section {
  padding: var(--forge-space-12) 0;
}

.forge-divider {
  border: none;
  border-top: 0.5px solid var(--c-border);
  margin: var(--forge-space-6) 0;
}


/* --------------------------------------------------------------------
   6. BUTTON  - .ui-btn
   -------------------------------------------------------------------- */
.ui-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 18px;
  height: 38px;
  border-radius: var(--ui-radius-md);
  font-family: var(--ui-font);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 0.5px solid var(--c-border2);
  background: transparent;
  color: var(--c-text);
  transition:
    background var(--ui-transition),
    border-color var(--ui-transition),
    opacity var(--ui-transition),
    transform var(--ui-transition);
  text-decoration: none;
  position: relative;
  white-space: nowrap;
  user-select: none;
  letter-spacing: 0.01em;
}
.ui-btn:hover:not(:disabled) {
  background: var(--c-bg2);
  border-color: var(--c-border3);
}
.ui-btn:active:not(:disabled) { transform: scale(0.98); }
.ui-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--forge-blush);
}
.ui-btn:disabled,
.ui-btn[aria-disabled="true"] {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* Variants */
.ui-btn-primary {
  background: var(--forge-black);
  color: var(--forge-offwhite);
  border-color: transparent;
}
.ui-btn-primary:hover:not(:disabled) {
  background: var(--forge-charcoal);
  opacity: 1;
}

.ui-btn-accent {
  background: var(--forge-red);
  color: var(--forge-offwhite);
  border-color: transparent;
}
.ui-btn-accent:hover:not(:disabled) {
  background: var(--forge-ember);
  opacity: 1;
}

.ui-btn-danger {
  color: var(--c-danger);
  border-color: var(--c-bg-danger);
}
.ui-btn-danger:hover:not(:disabled) {
  background: var(--c-bg-danger);
}

.ui-btn-ghost {
  border-color: transparent;
}
.ui-btn-ghost:hover:not(:disabled) {
  background: var(--c-bg2);
  border-color: transparent;
}

/* Sizes */
.ui-btn-sm  { height: 30px; padding: 0 12px; font-size: 13px; border-radius: var(--ui-radius-sm); }
.ui-btn-lg  { height: 46px; padding: 0 24px; font-size: 15px; }

/* Square icon button */
.ui-btn-icon         { width: 38px; padding: 0; }
.ui-btn-icon.ui-btn-sm { width: 30px; }
.ui-btn-icon.ui-btn-lg { width: 46px; }

/* Loading state */
.ui-btn-loading { pointer-events: none; }
.ui-btn-loading .btn-label { opacity: 0; }
.ui-btn-loading::after {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: ui-spin 0.6s linear infinite;
}
@keyframes ui-spin { to { transform: rotate(360deg); } }


/* --------------------------------------------------------------------
   7. FORM FIELD  — .ui-field, .ui-label
   -------------------------------------------------------------------- */
.ui-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.ui-label {
  font-family: var(--ui-font);
  font-size: 13px;
  font-weight: 500;
  color: var(--c-text2);
  display: flex;
  align-items: center;
  gap: 4px;
}
.ui-label .required {
  color: var(--c-danger);
  font-size: 12px;
}

.ui-helper {
  font-family: var(--ui-font);
  font-size: 12px;
  color: var(--c-text3);
}
.ui-error-msg {
  font-family: var(--ui-font);
  font-size: 12px;
  color: var(--c-danger);
  display: none;
}
.ui-error-msg.visible { display: block; }


/* --------------------------------------------------------------------
   8. INPUT  - .ui-input
   -------------------------------------------------------------------- */
.ui-input {
  width: 100%;
  height: 38px;
  padding: 0 12px;
  border-radius: var(--ui-radius-md);
  border: 0.5px solid var(--c-border2);
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--ui-font);
  font-size: 14px;
  transition: border-color var(--ui-transition), box-shadow var(--ui-transition);
  outline: none;
  appearance: none;
}
.ui-input::placeholder { color: var(--c-text3); }
.ui-input:hover        { border-color: var(--c-border3); }
.ui-input:focus {
  border-color: var(--forge-red);
  box-shadow: 0 0 0 3px var(--forge-blush);
}
.ui-input[aria-invalid="true"],
.ui-input.ui-input-error {
  border-color: var(--c-danger);
}
.ui-input[aria-invalid="true"]:focus,
.ui-input.ui-input-error:focus {
  box-shadow: 0 0 0 3px var(--c-bg-danger);
}
.ui-input:disabled { opacity: 0.5; cursor: not-allowed; }


/* --------------------------------------------------------------------
   9. TEXTAREA  - .ui-textarea
   -------------------------------------------------------------------- */
.ui-textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--ui-radius-md);
  border: 0.5px solid var(--c-border2);
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--ui-font);
  font-size: 14px;
  resize: vertical;
  min-height: 88px;
  outline: none;
  transition: border-color var(--ui-transition), box-shadow var(--ui-transition);
}
.ui-textarea::placeholder { color: var(--c-text3); }
.ui-textarea:hover { border-color: var(--c-border3); }
.ui-textarea:focus {
  border-color: var(--forge-red);
  box-shadow: 0 0 0 3px var(--forge-blush);
}


/* --------------------------------------------------------------------
   10. SELECT  -- .ui-select + .ui-select-wrap
   -------------------------------------------------------------------- */
.ui-select-wrap {
  position: relative;
  width: 100%;
}
.ui-select {
  width: 100%;
  height: 38px;
  padding: 0 32px 0 12px;
  border-radius: var(--ui-radius-md);
  border: 0.5px solid var(--c-border2);
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--ui-font);
  font-size: 14px;
  appearance: none;
  outline: none;
  cursor: pointer;
  transition: border-color var(--ui-transition), box-shadow var(--ui-transition);
}
.ui-select:hover { border-color: var(--c-border3); }
.ui-select:focus {
  border-color: var(--forge-red);
  box-shadow: 0 0 0 3px var(--forge-blush);
}
.ui-select-arrow {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--c-text3);
}


/* --------------------------------------------------------------------
   11. CHECKBOX & RADIO  -- .ui-check-label
   -------------------------------------------------------------------- */
.ui-check-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.ui-check-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--ui-font);
  font-size: 14px;
  cursor: pointer;
  user-select: none;
}
.ui-check-label input[type="checkbox"],
.ui-check-label input[type="radio"] {
  width: 16px;
  height: 16px;
  accent-color: var(--forge-red);
  cursor: pointer;
  flex-shrink: 0;
}
.ui-check-label input:focus-visible {
  outline: 2px solid var(--forge-red);
  outline-offset: 2px;
  border-radius: 3px;
}


/* --------------------------------------------------------------------
   12. TOGGLE  -- .ui-toggle-wrap
   -------------------------------------------------------------------- */
.ui-toggle-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
  font-family: var(--ui-font);
  font-size: 14px;
}
.ui-toggle-track {
  position: relative;
  width: 36px; height: 20px;
  border-radius: 10px;
  background: var(--c-border2);
  transition: background 200ms;
  flex-shrink: 0;
}
.ui-toggle-track.on { background: var(--forge-red); }
.ui-toggle-knob {
  position: absolute;
  top: 3px; left: 3px;
  width: 14px; height: 14px;
  background: white;
  border-radius: 50%;
  transition: transform 200ms;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.ui-toggle-track.on .ui-toggle-knob { transform: translateX(16px); }
.ui-toggle-wrap:focus-visible .ui-toggle-track {
  box-shadow: 0 0 0 3px var(--forge-blush);
}


/* --------------------------------------------------------------------
   13. BADGE  -- .ui-badge
   -------------------------------------------------------------------- */
.ui-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--forge-radius-pill);
  font-family: var(--ui-font);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.5;
  white-space: nowrap;
}
.ui-badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.ui-badge-default { background: var(--c-bg2); color: var(--c-text2); border: 0.5px solid var(--c-border); }
.ui-badge-accent  { background: var(--forge-tint); color: var(--forge-deep); }
.ui-badge-info    { background: var(--c-bg-info);    color: var(--c-info); }
.ui-badge-success { background: var(--c-bg-success); color: var(--c-success); }
.ui-badge-warn    { background: var(--c-bg-warn);    color: var(--c-warn); }
.ui-badge-danger  { background: var(--c-bg-danger);  color: var(--c-danger); }


/* --------------------------------------------------------------------
   14. ALERT  -- .ui-alert
   -------------------------------------------------------------------- */
.ui-alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--ui-radius-md);
  border-left: 3px solid;
  font-family: var(--ui-font);
  font-size: 14px;
}
.ui-alert-icon  { font-size: 16px; line-height: 1.4; flex-shrink: 0; }
.ui-alert-body  { flex: 1; min-width: 0; }
.ui-alert-title { font-weight: 500; margin-bottom: 2px; }
.ui-alert-desc  { font-size: 13px; opacity: 0.85; margin: 0; }
.ui-alert-close {
  background: none; border: none; cursor: pointer;
  color: inherit; opacity: 0.6; padding: 0;
  font-size: 14px; line-height: 1;
  align-self: flex-start; margin-left: 4px;
  border-radius: 3px;
}
.ui-alert-close:hover { opacity: 1; }
.ui-alert-close:focus-visible { outline: 2px solid currentColor; outline-offset: 2px; }

.ui-alert-accent  { background: var(--forge-tint);  color: var(--forge-deep);  border-color: var(--forge-red); }
.ui-alert-info    { background: var(--c-bg-info);    color: var(--c-info);    border-color: var(--c-info); }
.ui-alert-success { background: var(--c-bg-success); color: var(--c-success); border-color: var(--c-success); }
.ui-alert-warn    { background: var(--c-bg-warn);    color: var(--c-warn);    border-color: var(--c-warn); }
.ui-alert-danger  { background: var(--c-bg-danger);  color: var(--c-danger);  border-color: var(--c-danger); }


/* --------------------------------------------------------------------
   15. CARD  -- .ui-card
   -------------------------------------------------------------------- */
.ui-card {
  background: var(--c-bg);
  border: 0.5px solid var(--c-border);
  border-radius: var(--ui-radius-lg);
  overflow: hidden;
  font-family: var(--ui-font);
}
.ui-card-header {
  padding: 14px 16px 12px;
  border-bottom: 0.5px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.ui-card-title    { font-size: 14px; font-weight: 500; color: var(--c-text); }
.ui-card-subtitle { font-size: 12px; color: var(--c-text2); margin-top: 2px; }
.ui-card-body     { padding: 16px; }
.ui-card-footer {
  padding: 12px 16px;
  border-top: 0.5px solid var(--c-border);
  background: var(--c-bg2);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

/* Accent-topped card variant */
.ui-card-accent { border-top: 2px solid var(--forge-red); }


/* --------------------------------------------------------------------
   16. MODAL  — .ui-modal-backdrop + .ui-modal
   -------------------------------------------------------------------- */
.ui-modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(26, 25, 23, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}
.ui-modal-backdrop.open { display: flex; }
.ui-modal {
  background: var(--c-bg);
  border-radius: var(--ui-radius-xl);
  border: 0.5px solid var(--c-border);
  width: 100%; max-width: 440px;
  box-shadow: 0 8px 40px rgba(26, 25, 23, 0.18);
  animation: ui-modal-in 160ms ease;
  font-family: var(--ui-font);
}
@keyframes ui-modal-in {
  from { opacity: 0; transform: scale(0.96) translateY(8px); }
  to   { opacity: 1; transform: none; }
}
.ui-modal-header {
  padding: 18px 20px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 0.5px solid var(--c-border);
}
.ui-modal-title { font-size: 15px; font-weight: 500; color: var(--c-text); }
.ui-modal-close {
  background: none; border: none; cursor: pointer;
  color: var(--c-text2); padding: 4px; border-radius: 4px;
  font-size: 16px; line-height: 1;
  transition: color var(--ui-transition);
}
.ui-modal-close:hover { color: var(--c-text); }
.ui-modal-close:focus-visible { outline: 2px solid var(--forge-red); outline-offset: 2px; }
.ui-modal-body {
  padding: 18px 20px;
  font-size: 14px;
  color: var(--c-text2);
  line-height: 1.6;
}
.ui-modal-footer {
  padding: 14px 20px;
  border-top: 0.5px solid var(--c-border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}


/* --------------------------------------------------------------------
   17. FORGE SITE COMPONENTS
   Higher-level patterns for building the
   Forge website itself.
   -------------------------------------------------------------------- */

/* Nav */
.forge-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-bg);
  border-bottom: 0.5px solid var(--c-border);
  padding: 0 var(--forge-space-6);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--forge-space-4);
}

.forge-nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--forge-font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -0.03em;
}

.forge-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.forge-nav-links a {
  display: block;
  padding: 6px 12px;
  font-size: 14px;
  color: var(--c-text2);
  text-decoration: none;
  border-radius: var(--ui-radius-sm);
  transition: color var(--ui-transition), background var(--ui-transition);
}
.forge-nav-links a:hover { color: var(--c-text); background: var(--c-bg2); }
.forge-nav-links a.active { color: var(--c-text); font-weight: 500; }

/* Hero */
.forge-hero {
  padding: var(--forge-space-12) 0 var(--forge-space-10);
  text-align: center;
}

.forge-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--forge-red);
  background: var(--forge-tint);
  padding: 4px 12px;
  border-radius: var(--forge-radius-pill);
  margin-bottom: var(--forge-space-5);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.forge-hero-title {
  font-family: var(--forge-font-display);
  font-size: clamp(36px, 6vw, 68px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--c-text);
  margin-bottom: var(--forge-space-5);
}

.forge-hero-title em {
  font-style: italic;
  color: var(--forge-red);
}

.forge-hero-sub {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--c-text2);
  line-height: 1.6;
  max-width: 560px;
  margin: 0 auto var(--forge-space-8);
}

.forge-hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--forge-space-3);
  flex-wrap: wrap;
}

/* Feature grid */
.forge-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.forge-feature {
  background: var(--c-bg);
  border: 0.5px solid var(--c-border);
  border-radius: var(--ui-radius-lg);
  padding: var(--forge-space-5) var(--forge-space-5) var(--forge-space-5);
}

.forge-feature-icon {
  width: 36px; height: 36px;
  background: var(--forge-tint);
  border-radius: var(--ui-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--forge-space-3);
  color: var(--forge-red);
}

.forge-feature-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text);
  margin-bottom: 6px;
}

.forge-feature-desc {
  font-size: 13px;
  color: var(--c-text2);
  line-height: 1.6;
}

/* Stat bar */
.forge-stat-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0;
  border: 0.5px solid var(--c-border);
  border-radius: var(--ui-radius-lg);
  overflow: hidden;
  background: var(--c-bg);
}

.forge-stat {
  padding: var(--forge-space-5) var(--forge-space-5);
  border-right: 0.5px solid var(--c-border);
  text-align: center;
}
.forge-stat:last-child { border-right: none; }

.forge-stat-value {
  font-family: var(--forge-font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 4px;
}
.forge-stat-value em { color: var(--forge-red); font-style: normal; }

.forge-stat-label {
  font-size: 12px;
  color: var(--c-text3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

/* Code block */
.forge-codeblock {
  background: var(--forge-black);
  border-radius: var(--ui-radius-lg);
  padding: var(--forge-space-5) var(--forge-space-6);
  font-family: var(--forge-font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--forge-chalk);
  overflow-x: auto;
  border: 0.5px solid rgba(245, 243, 238, 0.08);
}
.forge-codeblock .c-comment { color: var(--forge-ash); }
.forge-codeblock .c-tag     { color: var(--forge-glow); }
.forge-codeblock .c-attr    { color: var(--forge-blush); }
.forge-codeblock .c-string  { color: #97c459; }
.forge-codeblock .c-keyword { color: #85b7eb; }

/* Footer */
.forge-footer {
  border-top: 0.5px solid var(--c-border);
  padding: var(--forge-space-8) var(--forge-space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--forge-space-4);
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--c-text3);
}


/* --------------------------------------------------------------------
   18. SURFACE UTILITIES
   Apply to any section or container to
   guarantee accessible contrast for all
   child text, borders, and components.
   Never manually set text colors inside
   a surface - let the tokens do it.
   -------------------------------------------------------------------- */

/**
 * Dark surface - forge black background.
 * Use for hero sections, feature grids,
 * full-bleed dark bands.
 *
 * <section class="forge-surface-dark">
 *   All text, borders, cards inside here
 *   automatically use light-on-dark values.
 * </section>
 */
.forge-surface-dark {
  background: var(--forge-black);

  --color-background-primary:   var(--forge-charcoal);
  --color-background-secondary: var(--forge-iron);
  --color-background-tertiary:  var(--forge-black);
  --color-background-accent:    var(--forge-deep);
  --color-background-info:      #042c53;
  --color-background-success:   #173404;
  --color-background-warning:   var(--forge-deep);
  --color-background-danger:    #501313;

  --color-text-primary:   var(--forge-offwhite);
  --color-text-secondary: var(--forge-chalk);
  --color-text-tertiary:  var(--forge-stone);
  --color-text-accent:    var(--forge-ember);
  --color-text-info:      #85b7eb;
  --color-text-success:   #97c459;
  --color-text-warning:   var(--forge-glow);
  --color-text-danger:    #f09595;

  --color-border-tertiary:  rgba(245, 243, 238, 0.08);
  --color-border-secondary: rgba(245, 243, 238, 0.16);
  --color-border-primary:   rgba(245, 243, 238, 0.28);
  --color-border-accent:    var(--forge-red);

  --c-bg:      var(--color-background-primary);
  --c-bg2:     var(--color-background-secondary);
  --c-bg3:     var(--color-background-tertiary);
  --c-text:    var(--color-text-primary);
  --c-text2:   var(--color-text-secondary);
  --c-text3:   var(--color-text-tertiary);
  --c-border:  var(--color-border-tertiary);
  --c-border2: var(--color-border-secondary);
  --c-border3: var(--color-border-primary);
}

/**
 * Charcoal surface -- one step lighter than black.
 * Use for alternating sections, sidebars,
 * secondary panels on a dark-themed page.
 *
 * <section class="forge-surface-charcoal">
 */
.forge-surface-charcoal {
  background: var(--forge-charcoal);

  --color-background-primary:   var(--forge-iron);
  --color-background-secondary: var(--forge-charcoal);
  --color-background-tertiary:  var(--forge-black);

  --color-text-primary:   var(--forge-offwhite);
  --color-text-secondary: var(--forge-chalk);
  --color-text-tertiary:  var(--forge-stone);
  --color-text-accent:    var(--forge-ember);

  --color-border-tertiary:  rgba(245, 243, 238, 0.08);
  --color-border-secondary: rgba(245, 243, 238, 0.16);
  --color-border-primary:   rgba(245, 243, 238, 0.28);

  --c-bg:      var(--color-background-primary);
  --c-bg2:     var(--color-background-secondary);
  --c-bg3:     var(--color-background-tertiary);
  --c-text:    var(--color-text-primary);
  --c-text2:   var(--color-text-secondary);
  --c-text3:   var(--color-text-tertiary);
  --c-border:  var(--color-border-tertiary);
  --c-border2: var(--color-border-secondary);
  --c-border3: var(--color-border-primary);
}

/**
 * Light surface - warm off-white background.
 * Use for main page body, docs, content sections.
 * This is the default for most pages.
 *
 * <section class="forge-surface-light">
 */
.forge-surface-light {
  background: var(--forge-offwhite);

  --color-background-primary:   var(--forge-white);
  --color-background-secondary: var(--forge-offwhite);
  --color-background-tertiary:  var(--forge-chalk);

  --color-text-primary:   var(--forge-black);
  --color-text-secondary: var(--forge-iron);
  --color-text-tertiary:  var(--forge-ash);
  --color-text-accent:    var(--forge-red);

  --color-border-tertiary:  rgba(26, 25, 23, 0.10);
  --color-border-secondary: rgba(26, 25, 23, 0.18);
  --color-border-primary:   rgba(26, 25, 23, 0.28);

  --c-bg:      var(--color-background-primary);
  --c-bg2:     var(--color-background-secondary);
  --c-bg3:     var(--color-background-tertiary);
  --c-text:    var(--color-text-primary);
  --c-text2:   var(--color-text-secondary);
  --c-text3:   var(--color-text-tertiary);
  --c-border:  var(--color-border-tertiary);
  --c-border2: var(--color-border-secondary);
  --c-border3: var(--color-border-primary);
}

/**
 * White surface - pure white background.
 * Use for cards, modals, docs content areas
 * that need maximum contrast.
 *
 * <div class="forge-surface-white">
 */
.forge-surface-white {
  background: var(--forge-white);

  --color-background-primary:   var(--forge-white);
  --color-background-secondary: var(--forge-offwhite);
  --color-background-tertiary:  var(--forge-chalk);

  --color-text-primary:   var(--forge-black);
  --color-text-secondary: var(--forge-iron);
  --color-text-tertiary:  var(--forge-ash);
  --color-text-accent:    var(--forge-red);

  --color-border-tertiary:  rgba(26, 25, 23, 0.10);
  --color-border-secondary: rgba(26, 25, 23, 0.18);
  --color-border-primary:   rgba(26, 25, 23, 0.28);

  --c-bg:      var(--color-background-primary);
  --c-bg2:     var(--color-background-secondary);
  --c-bg3:     var(--color-background-tertiary);
  --c-text:    var(--color-text-primary);
  --c-text2:   var(--color-text-secondary);
  --c-text3:   var(--color-text-tertiary);
  --c-border:  var(--color-border-tertiary);
  --c-border2: var(--color-border-secondary);
  --c-border3: var(--color-border-primary);
}

/**
 * Accent surface - forge red background.
 * Use sparingly: CTAs, banners, highlight bars.
 * All text flips to off-white automatically.
 *
 * <div class="forge-surface-accent">
 */
.forge-surface-accent {
  background: var(--forge-red);

  --color-background-primary:   var(--forge-ember);
  --color-background-secondary: var(--forge-deep);

  --color-text-primary:   var(--forge-offwhite);
  --color-text-secondary: var(--forge-blush);
  --color-text-tertiary:  rgba(245, 243, 238, 0.6);
  --color-text-accent:    var(--forge-offwhite);

  --color-border-tertiary:  rgba(245, 243, 238, 0.2);
  --color-border-secondary: rgba(245, 243, 238, 0.35);
  --color-border-primary:   rgba(245, 243, 238, 0.6);

  --c-bg:      var(--color-background-primary);
  --c-bg2:     var(--color-background-secondary);
  --c-text:    var(--color-text-primary);
  --c-text2:   var(--color-text-secondary);
  --c-text3:   var(--color-text-tertiary);
  --c-border:  var(--color-border-tertiary);
  --c-border2: var(--color-border-secondary);
  --c-border3: var(--color-border-primary);
}

/* Ghost button on dark surfaces — auto-adapts border to be visible */
.forge-surface-dark .ui-btn-ghost,
.forge-surface-charcoal .ui-btn-ghost,
.forge-surface-accent .ui-btn-ghost {
  border-color: var(--c-border2);
  color: var(--c-text);
}
.forge-surface-dark .ui-btn-ghost:hover,
.forge-surface-charcoal .ui-btn-ghost:hover,
.forge-surface-accent .ui-btn-ghost:hover {
  background: rgba(245, 243, 238, 0.08);
}

/* Default button on dark surfaces */
.forge-surface-dark .ui-btn,
.forge-surface-charcoal .ui-btn {
  color: var(--forge-offwhite);
  border-color: var(--c-border2);
}
.forge-surface-dark .ui-btn:hover,
.forge-surface-charcoal .ui-btn:hover {
  background: rgba(245, 243, 238, 0.08);
}

/* Feature cards inherit surface correctly */
.forge-surface-dark .forge-feature,
.forge-surface-charcoal .forge-feature {
  background: var(--c-bg);
  border-color: var(--c-border);
}
.forge-surface-dark .forge-feature-icon,
.forge-surface-charcoal .forge-feature-icon {
  background: rgba(200, 65, 10, 0.2);
  color: var(--forge-glow);
}

/* Stat bar on dark surfaces */
.forge-surface-dark .forge-stat-bar,
.forge-surface-charcoal .forge-stat-bar {
  background: var(--c-bg);
  border-color: var(--c-border);
}
.forge-surface-dark .forge-stat,
.forge-surface-charcoal .forge-stat {
  border-color: var(--c-border);
}


/*  ----------------------------------------------------
   19. SPACING & LAYOUT UTILITIES
   ----------------------------------------------------- */
.forge-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;
}

.forge-text-center { text-align: center; }
.forge-text-left   { text-align: left; }

.forge-mt-1 { margin-top: var(--forge-space-1); }
.forge-mt-2 { margin-top: var(--forge-space-2); }
.forge-mt-3 { margin-top: var(--forge-space-3); }
.forge-mt-4 { margin-top: var(--forge-space-4); }
.forge-mt-6 { margin-top: var(--forge-space-6); }
.forge-mt-8 { margin-top: var(--forge-space-8); }

.forge-mb-1 { margin-bottom: var(--forge-space-1); }
.forge-mb-2 { margin-bottom: var(--forge-space-2); }
.forge-mb-3 { margin-bottom: var(--forge-space-3); }
.forge-mb-4 { margin-bottom: var(--forge-space-4); }
.forge-mb-6 { margin-bottom: var(--forge-space-6); }
.forge-mb-8 { margin-bottom: var(--forge-space-8); }

/* ── MOBILE NAV ── */
@media (max-width: 768px) {
  .forge-nav {
    padding: 0 var(--forge-space-4);
  }

  .forge-nav-links {
    display: none;
  }

  .forge-nav .ui-btn-ghost {
    display: none;
  }

  .forge-container,
  .forge-container-sm {
    padding: 0 var(--forge-space-4);
  }
   .module-card-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .module-price {
    font-size: 10px;
  }
}

/* ----------------------------------------------------
   20. REDUCED MOTION
   ---------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .ui-btn,
  .ui-input,
  .ui-select,
  .ui-textarea,
  .ui-toggle-knob,
  .ui-toggle-track,
  .ui-modal,
  .ui-alert,
  .ui-modal-close,
  .forge-nav-links a,
  .forge-feature {
    transition: none;
    animation: none;
  }
  .ui-btn-loading::after { animation: none; }
}