/* ============================================================================
   DiSky Design System: Reusable Component Styles
   Depends on colors_and_type.css (tokens). Pure CSS, framework-agnostic.
   Covers: buttons, badges (kind / change-mode / meta), chips, code blocks,
   syntax-highlight token classes, signature rows, sidebar items, skeletons.
   ========================================================================== */

/* ---- Buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: 500;
  line-height: 1;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
  user-select: none;
}
.btn:active { transform: translateY(0.5px); }

.btn-primary { background: var(--primary); color: var(--primary-fg); }
.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary { background: var(--bg-raised); color: var(--fg); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--bg-hover); }

/* ---- Badges: KIND ----------------------------------------------------- */
/* Muted, distinct, not loud. Neutral fill + a hue-tinted left dot/border. */
.badge {
  display: inline-flex; align-items: center; gap: 0.4em;
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-inset);
  color: var(--fg-muted);
  white-space: nowrap;
  line-height: 1.5;
}
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex: none; }

.kind-expression { color: var(--sky-300); }
.kind-getter     { color: #c4b5fd; }       /* violet-300 */
.kind-effect     { color: var(--blurple-300); }
.kind-condition  { color: var(--emerald-300); }
.kind-event      { color: var(--amber-300); }
.kind-section    { color: #f0abfc; }       /* fuchsia-300 */
.kind-structure  { color: #fda4af; }       /* rose-300 */
.kind-type       { color: var(--fg-faint); }
/* light-theme overrides keep them legible on white */
html:not(.dark) .kind-expression { color: var(--sky-600); }
html:not(.dark) .kind-getter     { color: #7c3aed; }       /* violet-600 */
html:not(.dark) .kind-effect     { color: var(--blurple-600); }
html:not(.dark) .kind-condition  { color: var(--emerald-600); }
html:not(.dark) .kind-event      { color: var(--amber-600); }
html:not(.dark) .kind-section    { color: #c026d3; }
html:not(.dark) .kind-structure  { color: var(--rose-600); }
html:not(.dark) .kind-type       { color: var(--fg-faint); }

/* ---- Badges: CHANGE MODES (settable properties) ----------------------- */
.changemodes { display: inline-flex; gap: 0.3125rem; flex-wrap: wrap; }
.cm {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 600;
  padding: 0.125rem 0.4375rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-inset);
  color: var(--fg-muted);
  line-height: 1.5;
}
.cm-delete {
  color: var(--danger);
  background: var(--destructive-bg);
  border-color: var(--destructive-bd);
}

/* ---- Chips: return type / since / shared ------------------------------ */
.chip {
  display: inline-flex; align-items: center; gap: 0.35em;
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--fg);
  line-height: 1.5;
}
.chip-return { color: var(--sky-300); }
html:not(.dark) .chip-return { color: var(--sky-600); }
.chip-since { color: var(--fg-faint); background: transparent; border-color: var(--border); }
.chip-shared {
  color: var(--blurple-300); border-color: var(--blurple-600);
  background: rgba(88,101,242,0.10);
  font-weight: 600;
}
html:not(.dark) .chip-shared { color: var(--blurple-600); }

/* ---- Code block ------------------------------------------------------- */
.code-block {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.code-block pre {
  margin: 0;
  padding: 1rem 1.125rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-code);
  line-height: 1.7;
  color: var(--code-fg);
  tab-size: 4;
}
.code-block .code-caption {
  font-size: var(--fs-caption);
  color: var(--fg-faint);
  padding: 0.5rem 1.125rem;
  border-top: 1px solid var(--border);
  background: var(--bg-inset);
}
.code-copy {
  position: absolute; top: 0.625rem; right: 0.625rem;
  opacity: 0; transition: opacity var(--dur) var(--ease), background var(--dur) var(--ease);
  display: inline-flex; align-items: center; gap: 0.35em;
  font-family: var(--font-sans); font-size: var(--fs-micro); font-weight: 500;
  color: var(--fg-muted);
  padding: 0.3125rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-raised);
  cursor: pointer;
}
.code-block:hover .code-copy { opacity: 1; }
/* Keyboard users tab onto the button while the block isn't hovered: it must
   become visible on focus too, not only on mouse-over. */
.code-copy:focus-visible { opacity: 1; }
.code-copy:hover { background: var(--bg-hover); color: var(--fg); }

/* ---- Syntax-highlight token classes ----------------------------------- */
.tok-comment { color: var(--syn-comment); font-style: italic; }
.tok-kw      { color: var(--syn-keyword); }
.tok-eff     { color: var(--syn-effect); }
.tok-str     { color: var(--syn-string); }
.tok-num     { color: var(--syn-number); }
.tok-type    { color: var(--syn-type); }
.tok-punc    { color: var(--syn-punc); }
.tok-var     { color: var(--syn-var); }

/* ---- Syntax SIGNATURE row (the pattern) ------------------------------- */
.signature {
  font-family: var(--font-mono);
  font-size: var(--fs-name);
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  overflow-x: auto;
}
.ph { /* %type% placeholder, javadoc-style */
  color: var(--syn-type);
  background: var(--syn-placeholder-bg);
  border-radius: var(--radius-sm);
  padding: 0 0.25em;
  font-style: italic;
}
.opt { color: var(--fg-faint); } /* [optional] segments */