/* color-palette-from-image.css — tool-only styles. Tokens/chrome come from
   /shared/shell.css. COLORBLIND-CRITICAL (this is a color tool and the site
   owner is colorblind): every swatch carries its exact hex + RGB as TEXT — the
   color block is NEVER the only signal, and every color is copied by its value,
   never picked by eye. "Copied" feedback is a text change, never a color change.
   All selectors are scoped under #tool so nothing leaks onto the shared topbar
   (which injects <div class="controls">) or footer. */

/* #tool is a margin:0 auto flex item of the body column; width:100% keeps its
   cross size definite so an intrinsically-sized child (the preview <img>) can't
   content-size the container past a narrow viewport (crop-image lesson). */
#tool { width: 100%; max-width: 860px; margin: 0 auto; box-sizing: border-box; padding: var(--space-2xl) var(--space-xl) var(--space-4xl); }
#tool h1 { margin: 0 0 var(--space-sm); font-size: var(--t-2xl); font-weight: 600; }
.tool-lead { margin: 0 0 var(--space-xl); color: var(--text-secondary); font-size: var(--t-lg); max-width: 70ch; }

/* The playbook guard: [hidden] must beat any author display: rule below
   (.result-top is flex, .copy-actions is flex, .swatch-grid is grid, etc.). */
#tool [hidden] { display: none !important; }

/* --- Dropzone ------------------------------------------------------------ */
.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-card);
  padding: var(--space-2xl);
  text-align: center;
  background: var(--surface);
}
.dropzone.is-drag { border-color: var(--accent); background: var(--surface-2); }
.dropzone p { margin: 0 0 var(--space-sm); }
.dropzone-hint { color: var(--text-muted); font-size: var(--t-sm); margin: var(--space-sm) 0 0; }

.file-label {
  position: relative;
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-control);
  background: var(--accent);
  color: var(--accent-contrast);
  font-weight: 500;
  cursor: pointer;
}
/* Visually hidden, NOT display:none — the input stays focusable and in the
   a11y tree (WCAG 2.1.1). Same clip pattern as shell.css's .visually-hidden. */
.file-label input {
  position: absolute !important;
  width: 1px !important; height: 1px !important;
  margin: -1px !important; padding: 0 !important;
  border: 0 !important; clip: rect(0 0 0 0) !important;
  clip-path: inset(50%) !important; overflow: hidden !important;
  white-space: nowrap !important;
}
.file-label:focus-within { outline: 2px solid var(--focus-ring); outline-offset: 2px; }

.status-line { margin: var(--space-md) 0 0; font-weight: 500; }

/* --- Result: top row (preview + color-count) ----------------------------- */
#result { margin-top: var(--space-xl); }

.result-top {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.preview { display: flex; align-items: center; gap: var(--space-md); min-width: 0; }
.preview-img {
  width: 72px; height: 72px; object-fit: cover;
  border-radius: var(--radius-control); border: 1px solid var(--border);
  background: var(--surface-2); flex: none;
}
.preview-name { font-size: var(--t-sm); color: var(--text-secondary); overflow-wrap: anywhere; min-width: 0; }

.count-control { display: inline-flex; align-items: center; gap: var(--space-sm); flex: none; }
.count-control label { font-weight: 600; font-size: var(--t-sm); }
.count-control select {
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-control);
  background: var(--surface); color: inherit; font: inherit;
}
.count-control select:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }

.section-title { font-size: var(--t-md); font-weight: 600; margin: 0 0 var(--space-sm); }

/* --- Dominant color ------------------------------------------------------ */
.dominant { margin-bottom: var(--space-xl); }
.dominant-card {
  display: flex; align-items: stretch; gap: var(--space-lg);
  width: 100%; text-align: left;
  padding: var(--space-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface);
  cursor: pointer;
}
.dominant-card:hover { background: var(--surface-2); }
.dominant-card:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.dominant-swatch {
  flex: none; width: 96px; height: 96px;
  border-radius: var(--radius-control);
  border: 1px solid var(--border);
}
.dominant-values { display: flex; flex-direction: column; justify-content: center; gap: var(--space-xs); min-width: 0; }
/* The hex is the headline value — large, tabular, always readable as text. */
.dominant-hex { font-size: var(--t-2xl); font-weight: 600; font-variant-numeric: tabular-nums; line-height: 1.1; }
.dominant-rgb, .dominant-hsl { font-size: var(--t-sm); color: var(--text-secondary); font-variant-numeric: tabular-nums; }
.dominant-copied { font-size: var(--t-sm); font-weight: 600; color: var(--accent); }

/* --- Palette grid -------------------------------------------------------- */
.palette { margin-bottom: var(--space-xl); }
.swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(116px, 1fr));
  gap: var(--space-md);
}
/* Each swatch is a copy button; its hex + RGB are shown as TEXT so the color
   block is never the only signal (colorblind-critical). */
.swatch {
  display: flex; flex-direction: column; gap: 0;
  padding: 0; text-align: left;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface);
  overflow: hidden; cursor: pointer;
}
.swatch:hover { border-color: var(--border-strong); }
.swatch:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
/* The color block. The hex label is drawn ON it with a contrast-safe color
   chosen per-swatch by labelOn() (set inline in JS). */
.swatch-color {
  display: flex; align-items: center; justify-content: center;
  height: 72px; padding: var(--space-xs);
  font-weight: 600; font-size: var(--t-sm);
  font-variant-numeric: tabular-nums;
}
.swatch-rgb {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--t-xs); color: var(--text-secondary);
  font-variant-numeric: tabular-nums; overflow-wrap: anywhere;
  border-top: 1px solid var(--border);
}

/* --- Copy / download actions --------------------------------------------- */
.copy-actions { display: flex; gap: var(--space-sm); flex-wrap: wrap; }
.copy-actions button {
  border: 1px solid var(--border-strong);
  background: var(--surface); color: inherit; font: inherit;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-control); cursor: pointer;
}
.copy-actions button:hover { background: var(--surface-2); }
#download-png { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); font-weight: 500; }
#download-png:hover { background: var(--accent-hover); }

.action-error {
  margin: var(--space-md) 0 0;
  font-size: var(--t-sm); font-weight: 600; color: var(--danger);
}
.action-error::before { content: "⚠ "; }

/* --- Deep page ----------------------------------------------------------- */
.tool-copy { margin-top: var(--space-3xl); max-width: 70ch; }
.tool-copy h2 { font-size: var(--t-lg); font-weight: 600; margin: var(--space-2xl) 0 var(--space-sm); }
.tool-copy p { color: var(--text-secondary); line-height: 1.55; }
.tool-copy code { font-size: 0.9em; background: var(--surface-2); padding: 0 var(--space-xs); border-radius: 3px; }
.faq details { border-top: 1px solid var(--border); padding: var(--space-md) 0; }
.faq details:last-child { border-bottom: 1px solid var(--border); }
.faq summary { font-weight: 600; cursor: pointer; }
.faq details p { margin: var(--space-sm) 0 0; }

/* --- Mobile -------------------------------------------------------------- */
@media (max-width: 520px) {
  #tool { padding-inline: var(--space-lg); }
  .result-top { align-items: flex-start; }
  .copy-actions { flex-direction: column; align-items: stretch; }
  .swatch-grid { grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); }
  .dominant-hex { font-size: var(--t-xl); }
}