/* ============================================================================
   Tool page layout — implements PRD §7 / UX/UI §10 exactly.
   Loaded only on tool pages (TAD §10 performance strategy).
   ========================================================================= */

/* --- Breadcrumb ----------------------------------------------------------- */

.breadcrumb {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding-block: var(--space-3) 0;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
}

.breadcrumb li::after {
  content: "/";
  margin-left: var(--space-2);
  color: var(--color-text-subtle);
}

.breadcrumb li:last-child::after {
  content: "";
}

.breadcrumb [aria-current="page"] {
  color: var(--color-text-muted);
}

/* --- Hero ----------------------------------------------------------------- */

.tool-hero {
  padding-block: var(--space-4);
}

.tool-hero__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.tool-hero__head h1 {
  margin: 0;
}

.tool-hero__desc {
  color: var(--color-text-muted);
  font-size: var(--font-size-md);
  margin: 0 0 var(--space-4);
}

/* Trust badges row */
.trust-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  list-style: none;
  padding: 0;
  margin: 0;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
}

.trust-badge .icon {
  width: var(--icon-md);
  height: var(--icon-md);
  color: var(--color-primary);
  flex: none;
}

.trust-badge b {
  display: block;
  color: var(--color-text);
}

.trust-badge span {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

/* --- Workbench: input + output panels ------------------------------------ */

.workbench {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
  min-height: 32px;
}

.panel__label {
  font-weight: var(--weight-semibold);
  font-size: var(--font-size-sm);
}

.panel__label span {
  color: var(--color-text-subtle);
  font-weight: var(--weight-regular);
}

/* Mode switch (Formatted / Minified / Tree View) */
.mode-switch {
  display: inline-flex;
  gap: var(--space-1);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  padding: 2px;
}

.mode-switch button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.mode-switch button[aria-pressed="true"] {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-success);
}

.status-pill .icon {
  width: var(--icon-sm);
  height: var(--icon-sm);
}

.status-pill[hidden] {
  display: none;
}

/* Action rows under each panel */
.panel__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}

.panel__actions .spacer {
  margin-left: auto;
}

.char-count {
  color: var(--color-text-subtle);
  font-size: var(--font-size-xs);
}

.auto-updated {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-subtle);
  font-size: var(--font-size-xs);
}

.auto-updated::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
}

/* --- Tool options row (e.g. JSON indent / sort keys) --------------------- */

.tool-options {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.tool-option {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.tool-option select {
  font-family: inherit;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: 4px var(--space-2);
  cursor: pointer;
}

.tool-option--check {
  cursor: pointer;
}

.tool-option--check input {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.save-hint {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-success);
}

.save-hint .icon {
  width: 14px;
  height: 14px;
}

/* --- Privacy notice banner ----------------------------------------------- */

.privacy-notice {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-success-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  margin-top: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.privacy-notice .icon {
  color: var(--color-success);
  width: var(--icon-md);
  height: var(--icon-md);
  flex: none;
}

.privacy-notice b {
  color: var(--color-success);
}

/* --- How to use + Examples (two-column on desktop) ----------------------- */

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.steps {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 0;
}

.steps li {
  display: flex;
  gap: var(--space-3);
  padding-block: var(--space-2);
  align-items: flex-start;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--font-size-xs);
  font-weight: var(--weight-bold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Examples tabs */
.tabs {
  display: flex;
  gap: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-3);
}

.tabs button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
}

.tabs button[aria-selected="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.example-panel[hidden] {
  display: none;
}

.example-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-3);
}

/* --- Code / output surfaces ---------------------------------------------- */

.code-surface {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

/* --- Output flavours: JSON tree, hash rows, JWT parts -------------------- */

.code-surface mark,
#rx-highlight mark {
  background: #FEF08A;
  color: #713F12;
  border-radius: 2px;
  padding: 0 1px;
}

.tok-key { color: #0369A1; }
.tok-str { color: #15803D; }
.tok-num { color: #B45309; }
.tok-bool { color: #7C3AED; }
.tok-null { color: #9333EA; }
.tok-punc { color: var(--color-text-subtle); }

/* JSON tree view */
.jtree {
  list-style: none;
  margin: 0;
  padding-left: var(--space-3);
}

.jtree ul {
  list-style: none;
  margin: 0;
  padding-left: var(--space-4);
}

.jtree details > summary {
  cursor: pointer;
  list-style: revert;
}

.jtree__key { color: #0369A1; }

/* Hash rows */
.hash-rows {
  display: grid;
  gap: var(--space-2);
}

.hash-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: var(--space-3);
  align-items: baseline;
}

.hash-row__algo {
  font-weight: var(--weight-bold);
  color: var(--color-text-muted);
}

.hash-row__value {
  word-break: break-all;
  color: var(--color-text);
}

/* JWT parts */
.jwt-part + .jwt-part {
  margin-top: var(--space-3);
}

.jwt-part__label {
  font-weight: var(--weight-bold);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-1);
}

.jwt-part--header .jwt-part__label { color: #DC2626; }
.jwt-part--payload .jwt-part__label { color: #7C3AED; }
.jwt-part--signature .jwt-part__label { color: #0369A1; }

.jwt-part__body {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.jwt-part--signature .jwt-part__body {
  color: var(--color-text-muted);
}

/* --- Regex workbench ----------------------------------------------------- */

.regex-pattern {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
}

.regex-pattern:focus-within {
  border-color: var(--color-primary);
  box-shadow: var(--ring-focus);
}

.regex-delim {
  font-family: var(--font-mono);
  font-size: var(--font-size-md);
  color: var(--color-text-subtle);
}

.regex-input {
  flex: 1;
  border: none;
  background: none;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  padding: var(--space-1) 0;
}

.regex-flags {
  width: 72px;
  border: none;
  background: none;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.regex-input:focus,
.regex-flags:focus {
  outline: none;
}

#rx-highlight {
  min-height: 200px;
  white-space: pre-wrap;
}

.regex-groups {
  margin-top: var(--space-4);
}

.regex-groups table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.regex-groups th,
.regex-groups td {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
  vertical-align: top;
}

.regex-groups th {
  color: var(--color-text-muted);
  font-weight: var(--weight-semibold);
}

/* --- UUID generator ------------------------------------------------------ */

.uuid-controls {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.uuid-count {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: var(--weight-medium);
}

.uuid-count .field {
  width: 120px;
}

.uuid-output {
  margin-top: var(--space-3);
  min-height: 220px;
  font-family: var(--font-mono);
}

/* --- Color converter ----------------------------------------------------- */

.color-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.color-picker {
  width: 56px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: none;
  cursor: pointer;
  flex: none;
}

.color-picker::-webkit-color-swatch-wrapper { padding: 4px; }
.color-picker::-webkit-color-swatch { border: none; border-radius: var(--radius-sm); }

.color-result {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}

.color-swatch {
  width: 160px;
  height: 160px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  flex: none;
}

.color-values {
  flex: 1;
  min-width: 240px;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.color-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
}

.color-row__label {
  width: 56px;
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.color-row__value {
  flex: 1;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

.color-row__copy {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-subtle);
  display: inline-flex;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
}

.color-row__copy:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* --- Markdown preview (rendered prose inside the output surface) ---------- */

.md-preview {
  font-family: var(--font-body);
  white-space: normal;
  line-height: var(--line-normal);
}

.md-preview :first-child { margin-top: 0; }
.md-preview :last-child { margin-bottom: 0; }

.md-preview h1,
.md-preview h2,
.md-preview h3 { margin: var(--space-4) 0 var(--space-2); line-height: var(--line-tight); }

.md-preview p,
.md-preview ul,
.md-preview ol,
.md-preview blockquote { margin: 0 0 var(--space-3); }

.md-preview code {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1px 4px;
}

.md-preview pre {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  overflow-x: auto;
}

.md-preview pre code { background: none; border: none; padding: 0; }

.md-preview blockquote {
  border-left: 3px solid var(--color-border-strong);
  padding-left: var(--space-3);
  color: var(--color-text-muted);
}

.md-preview a { color: var(--color-primary); }

.md-preview table {
  border-collapse: collapse;
  width: 100%;
}

.md-preview th,
.md-preview td {
  border: 1px solid var(--color-border);
  padding: var(--space-2);
  text-align: left;
}

/* --- FAQ ------------------------------------------------------------------ */

.faq-section {
  margin-top: var(--space-6);
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 var(--space-4);
}

/* --- Related tools -------------------------------------------------------- */

.related-tools {
  margin-top: var(--space-6);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-3);
}

/* --- Page meta footer (last updated + share) ----------------------------- */

.tool-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.share-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.share-links a,
.share-links button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
}

.share-links a:hover,
.share-links button:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* --- Responsive (UX/UI §5) ----------------------------------------------- */

@media (max-width: 1023px) {
  .panels,
  .info-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }
  .faq-grid {
    gap: 0;
  }
}

@media (max-width: 767px) {
  .trust-badges {
    gap: var(--space-3);
  }
  .panel__actions .btn {
    flex: 1 1 auto;
  }
}