/* ══════════════════════════════════════════════════════════════
   DevKit · style.css
   Catppuccin-inspired pastel palette · dark + light mode
   ══════════════════════════════════════════════════════════════ */

/* ─── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
button { font-family: inherit; cursor: pointer; }
textarea { font-family: inherit; }

/* ─── Design tokens — dark (default) ────────────────────────── */
:root {
  /* Surfaces */
  --c-base:      #1e1e2e;
  --c-mantle:    #181825;
  --c-crust:     #11111b;
  --c-surface0:  #313244;
  --c-surface1:  #45475a;
  --c-surface2:  #585b70;
  --c-overlay0:  #6c7086;
  --c-overlay1:  #7f849c;
  --c-overlay2:  #9399b2;

  /* Text */
  --c-text:      #cdd6f4;
  --c-subtext1:  #bac2de;
  --c-subtext0:  #a6adc8;

  /* Pastel accents */
  --c-rosewater: #f5e0dc;
  --c-flamingo:  #f2cdcd;
  --c-pink:      #f38ba8;
  --c-mauve:     #cba6f7;
  --c-red:       #f38ba8;
  --c-maroon:    #eba0ac;
  --c-peach:     #fab387;
  --c-yellow:    #f9e2af;
  --c-green:     #a6e3a1;
  --c-teal:      #94e2d5;
  --c-sky:       #89dceb;
  --c-sapphire:  #74c7ec;
  --c-blue:      #89b4fa;
  --c-lavender:  #b4befe;

  /* Semantic aliases */
  --border:         var(--c-surface1);
  --border-subtle:  var(--c-surface0);
  --focus-ring:     rgba(137,180,250,.25);
  --shadow:         0 1px 3px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.3);
  --shadow-sm:      0 1px 3px rgba(0,0,0,.3);

  /* JWT */
  --jwt-header:   var(--c-blue);
  --jwt-payload:  var(--c-pink);
  --jwt-sig:      var(--c-yellow);

  /* Syntax highlight */
  --syn-key:      var(--c-teal);
  --syn-string:   var(--c-green);
  --syn-number:   var(--c-peach);
  --syn-boolean:  var(--c-mauve);
  --syn-null:     var(--c-sky);
  --syn-bracket:  var(--c-overlay1);

  /* Radius */
  --r-sm:   6px;
  --r-md:   10px;
  --r-lg:   14px;
  --r-xl:   18px;
  --r-full: 9999px;

  /* Motion */
  --ease: cubic-bezier(.4,0,.2,1);
  --dur: 150ms;

  /* Header */
  --header-h:  60px;
  --header-bg: rgba(17,17,27,.88);
  --header-bd: rgba(69,71,90,.5);
}

/* ─── Design tokens — light ──────────────────────────────────── */
[data-theme="light"] {
  --c-base:      #eff1f5;
  --c-mantle:    #e6e9ef;
  --c-crust:     #dce0e8;
  --c-surface0:  #ccd0da;
  --c-surface1:  #bcc0cc;
  --c-surface2:  #acb0be;
  --c-overlay0:  #9ca0b0;
  --c-overlay1:  #8c8fa1;
  --c-overlay2:  #7c7f93;

  --c-text:      #4c4f69;
  --c-subtext1:  #5c5f77;
  --c-subtext0:  #6c6f85;

  --c-rosewater: #dc8a78;
  --c-flamingo:  #dd7878;
  --c-pink:      #ea76cb;
  --c-mauve:     #8839ef;
  --c-red:       #d20f39;
  --c-maroon:    #e64553;
  --c-peach:     #fe640b;
  --c-yellow:    #df8e1d;
  --c-green:     #40a02b;
  --c-teal:      #179299;
  --c-sky:       #04a5e5;
  --c-sapphire:  #209fb5;
  --c-blue:      #1e66f5;
  --c-lavender:  #7287fd;

  --focus-ring:     rgba(30,102,245,.18);
  --shadow:         0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --shadow-sm:      0 1px 3px rgba(0,0,0,.07);

  --header-bg: rgba(239,241,245,.9);
  --header-bd: rgba(188,192,204,.7);
}

/* ─── Scrollbar ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 7px; height: 7px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--c-surface1); border-radius: var(--r-full); }
::-webkit-scrollbar-thumb:hover { background: var(--c-surface2); }

/* ─── Base ────────────────────────────────────────────────────── */
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--c-base);
  color: var(--c-text);
  min-height: 100vh;
  line-height: 1.5;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

/* ─── Header ──────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-bd);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-text);
  flex-shrink: 0;
  letter-spacing: -.01em;
}

.logo-mark {
  width: 26px;
  height: 26px;
  color: var(--c-blue);
}

.logo-img {
  height: 34px;
  width: 34px;
  object-fit: contain;
  border-radius: var(--r-sm);
  flex-shrink: 0;
}

.logo-name {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -.01em;
  color: var(--c-text);
}

.logo-tld {
  color: var(--c-blue);
}

.logo-product {
  font-weight: 400;
  color: var(--c-subtext0);
}

/* ─── Tab nav ─────────────────────────────────────────────────── */
.tab-nav {
  display: flex;
  gap: .25rem;
  flex: 1;
  justify-content: center;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: .425rem;
  padding: .4rem .9rem;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--c-subtext0);
  font-size: .8125rem;
  font-weight: 500;
  line-height: 1;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  white-space: nowrap;
}

.tab-btn svg { width: 15px; height: 15px; }

.tab-btn:hover {
  color: var(--c-text);
  background: var(--c-surface0);
}

.tab-btn.active {
  color: var(--c-blue);
  background: color-mix(in srgb, var(--c-blue) 10%, transparent);
  border-color: color-mix(in srgb, var(--c-blue) 20%, transparent);
}

/* ─── GitHub link ─────────────────────────────────────────────── */
.github-btn {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--c-surface0);
  color: var(--c-subtext0);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.github-btn:hover {
  color: var(--c-text);
  background: var(--c-surface1);
  border-color: var(--c-surface2);
}

.github-btn svg { width: 16px; height: 16px; }

/* ─── Build footer ────────────────────────────────────────────── */
.site-footer {
  position: fixed;
  bottom: .625rem;
  right: .875rem;
  pointer-events: none;
}

.build-version {
  font-family: 'JetBrains Mono', monospace;
  font-size: .65rem;
  color: var(--c-overlay0);
  opacity: .6;
  letter-spacing: .04em;
}

/* ─── Theme toggle ────────────────────────────────────────────── */
.theme-toggle {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--c-surface0);
  color: var(--c-subtext0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.theme-toggle:hover {
  color: var(--c-text);
  background: var(--c-surface1);
}

.theme-toggle svg { width: 16px; height: 16px; }

[data-theme="dark"]  .icon-sun  { display: block; }
[data-theme="dark"]  .icon-moon { display: none; }
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* ─── Main layout ─────────────────────────────────────────────── */
.main-content {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 2rem;
}

.tool-panel          { display: none; }
.tool-panel.active   { display: block; }

.panel-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.panel-inner--fill {
  height: calc(100vh - var(--header-h) - 2.5rem);
  height: calc(100dvh - var(--header-h) - 2.5rem);
}

/* ─── Shared section header ───────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: .5rem;
}

.section-label {
  font-size: .6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--c-overlay1);
}

.header-actions { display: flex; gap: .25rem; }

/* ─── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .4rem .8rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--c-surface0);
  color: var(--c-subtext1);
  font-size: .8125rem;
  font-weight: 500;
  line-height: 1;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
}

.btn:hover {
  color: var(--c-text);
  background: var(--c-surface1);
  border-color: var(--c-surface2);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--c-surface0);
  border-color: transparent;
}

.btn-sm  { padding: .3rem .65rem; font-size: .75rem; }
.btn-xs  { padding: .2rem .5rem; font-size: .7rem; }

/* ─── Code inputs ─────────────────────────────────────────────── */
.code-input {
  display: block;
  width: 100%;
  background: var(--c-mantle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  color: var(--c-text);
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;
  font-size: .84375rem;
  line-height: 1.65;
  padding: .875rem 1rem;
  resize: vertical;
  outline: none;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.code-input:focus {
  border-color: var(--c-blue);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.code-input::placeholder {
  color: var(--c-overlay0);
  font-style: italic;
}

/* ─── Error bar ───────────────────────────────────────────────── */
.error-bar {
  padding: .6rem 1rem;
  border-radius: var(--r-md);
  background: color-mix(in srgb, var(--c-red) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--c-red) 30%, transparent);
  color: var(--c-red);
  font-family: 'JetBrains Mono', monospace;
  font-size: .8125rem;
}

/* ═══════════════════════════════════════════════════════════════
   JWT DECODER
   ══════════════════════════════════════════════════════════════ */

/* Unified input zone */
.jwt-input-zone {
  background: var(--c-mantle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.jwt-input-zone:focus-within {
  border-color: var(--c-blue);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.jwt-input-zone.is-error {
  border-color: color-mix(in srgb, var(--c-red) 60%, transparent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-red) 12%, transparent);
}

.jwt-zone-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .45rem .875rem;
  border-bottom: 1px solid var(--border-subtle);
}

.jwt-zone-body {
  padding: .875rem 1rem;
  min-height: 80px;
}

/* Plain-text input — visible when editing */
.jwt-textarea {
  display: block;
  width: 100%;
  min-height: 64px;
  background: transparent;
  border: none;
  border-radius: 0;
  color: var(--c-text);
  caret-color: var(--c-text);
  font-family: 'JetBrains Mono', monospace;
  font-size: .8125rem;
  line-height: 1.65;
  resize: none;
  outline: none;
  padding: 0;
  word-break: break-all;
  overflow-wrap: anywhere;
}

.jwt-textarea::placeholder {
  color: var(--c-overlay0);
  font-style: italic;
}

/* Colorized display — shown after successful parse */
.jwt-colorized {
  font-family: 'JetBrains Mono', monospace;
  font-size: .8125rem;
  line-height: 1.65;
  word-break: break-all;
  overflow-wrap: anywhere;
  cursor: text;
  min-height: 64px;
  position: relative;
}

.jwt-colorized::after {
  content: '✎ click to edit';
  display: block;
  margin-top: .625rem;
  font-size: .65rem;
  font-family: 'Inter', sans-serif;
  color: var(--c-overlay0);
  font-style: italic;
}

.jwt-seg-header  { color: var(--jwt-header); }
.jwt-seg-payload { color: var(--jwt-payload); }
.jwt-seg-sig     { color: var(--jwt-sig); opacity: .75; }

.jwt-dot {
  color: var(--c-overlay0);
  font-weight: 700;
  padding: 0 1px;
}

.jwt-error-inline {
  padding: .4rem .875rem .5rem;
  border-top: 1px solid color-mix(in srgb, var(--c-red) 20%, transparent);
  color: var(--c-red);
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
}

/* Status bar */
.status-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .2rem .6rem;
  border-radius: var(--r-full);
  font-size: .7rem;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: .02em;
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.badge-valid   { background: color-mix(in srgb, var(--c-green)   14%, transparent); color: var(--c-green);   border: 1px solid color-mix(in srgb, var(--c-green)   25%, transparent); }
.badge-expired { background: color-mix(in srgb, var(--c-red)     14%, transparent); color: var(--c-red);     border: 1px solid color-mix(in srgb, var(--c-red)     25%, transparent); }
.badge-warn    { background: color-mix(in srgb, var(--c-yellow)  14%, transparent); color: var(--c-yellow);  border: 1px solid color-mix(in srgb, var(--c-yellow)  25%, transparent); }
.badge-info    { background: color-mix(in srgb, var(--c-blue)    12%, transparent); color: var(--c-blue);    border: 1px solid color-mix(in srgb, var(--c-blue)    20%, transparent); }
.badge-neutral { background: color-mix(in srgb, var(--c-overlay1) 12%, transparent); color: var(--c-overlay1); border: 1px solid color-mix(in srgb, var(--c-overlay1) 20%, transparent); }

/* Decoded panels */
.jwt-decoded {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 720px) {
  .jwt-decoded { grid-template-columns: 1fr; }
}

.decoded-panel {
  background: var(--c-mantle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  overflow: hidden;
}

.decoded-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem .875rem;
  border-bottom: 1px solid var(--border-subtle);
}

.header-accent  { border-left: 3px solid var(--jwt-header); }
.payload-accent { border-left: 3px solid var(--jwt-payload); }

.decoded-panel-label {
  font-size: .6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
}

.header-accent  .decoded-panel-label { color: var(--jwt-header); }
.payload-accent .decoded-panel-label { color: var(--jwt-payload); }

.decoded-panel-body {
  padding: .5rem .625rem;
  overflow-x: auto;
}

/* ── Claim table (structured key/value rows) ──────────────────── */
.claim-table {
  display: flex;
  flex-direction: column;
}

.claim-row {
  display: grid;
  grid-template-columns: minmax(90px, max-content) 1fr;
  gap: .25rem .875rem;
  padding: .4rem .5rem;
  border-radius: var(--r-sm);
  align-items: start;
  transition: background var(--dur) var(--ease);
}

.claim-row:hover { background: var(--c-surface0); }

.ck {
  font-family: 'JetBrains Mono', monospace;
  font-size: .775rem;
  font-weight: 500;
  color: var(--syn-key);
  padding-top: .15rem;
  white-space: nowrap;
}

.cv-group {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  min-width: 0;
}

.cv-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .25rem .4rem;
}

.cv {
  font-family: 'JetBrains Mono', monospace;
  font-size: .8rem;
  word-break: break-all;
}

.cv-string  { color: var(--syn-string); }
.cv-number  { color: var(--syn-number); }
.cv-boolean { color: var(--syn-boolean); }
.cv-null    { color: var(--syn-null); }

.cv-tag {
  display: inline-flex;
  align-items: center;
  padding: .1rem .45rem;
  background: var(--c-surface0);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  color: var(--c-subtext1);
}

/* Syntax highlight classes (kept for potential future use) */
.syn-k { color: var(--syn-key); }
.syn-s { color: var(--syn-string); }
.syn-n { color: var(--syn-number); }
.syn-b { color: var(--syn-boolean); }
.syn-z { color: var(--syn-null); }
.syn-p { color: var(--syn-bracket); }

/* PingOne claim annotations */
.claim-hint {
  display: inline-flex;
  align-items: center;
  margin-left: .4rem;
  padding: .05rem .4rem;
  background: color-mix(in srgb, var(--c-blue) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--c-blue) 22%, transparent);
  border-radius: var(--r-sm);
  font-size: .65rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  color: var(--c-blue);
  vertical-align: middle;
  white-space: nowrap;
}

.time-note {
  margin-left: .5rem;
  font-size: .72rem;
  font-family: 'Inter', sans-serif;
  color: var(--c-overlay1);
  font-style: italic;
}

.url-mode-desc {
  font-size: .7rem;
  color: var(--c-overlay0);
  font-family: 'JetBrains Mono', monospace;
  font-style: italic;
}

/* ═══════════════════════════════════════════════════════════════
   JSON EDITOR
   ══════════════════════════════════════════════════════════════ */

/* ── JSON inner sub-nav ──────────────────────────────────────── */
.json-subnav {
  display: flex;
  gap: .25rem;
  padding-bottom: .625rem;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.json-subtab-btn {
  padding: .3rem .75rem;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--c-subtext0);
  font-size: .8rem;
  font-weight: 500;
  line-height: 1;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.json-subtab-btn:hover {
  color: var(--c-text);
  background: var(--c-surface0);
}

.json-subtab-btn.active {
  color: var(--c-blue);
  background: color-mix(in srgb, var(--c-blue) 10%, transparent);
  border-color: color-mix(in srgb, var(--c-blue) 20%, transparent);
}

/* ── JSON sub-panels ─────────────────────────────────────────── */
.json-subpanel {
  display: none;
  flex-direction: column;
  gap: 1rem;
  flex: 1;
  min-height: 0;
}

.json-subpanel.active {
  display: flex;
}

.json-toolbar {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.toolbar-left  { display: flex; gap: .3rem; }
.toolbar-right { display: flex; gap: .3rem; margin-left: auto; }
.toolbar-center { margin-left: auto; margin-right: auto; }

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .2rem .6rem;
  border-radius: var(--r-full);
  font-size: .7rem;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  transition: all var(--dur) var(--ease);
}

.status-chip.valid   { background: color-mix(in srgb, var(--c-green) 14%, transparent); color: var(--c-green);  border: 1px solid color-mix(in srgb, var(--c-green) 25%, transparent); }
.status-chip.invalid { background: color-mix(in srgb, var(--c-red)   14%, transparent); color: var(--c-red);    border: 1px solid color-mix(in srgb, var(--c-red)   25%, transparent); }
.status-chip.empty   { background: transparent; color: var(--c-overlay0); border: 1px solid transparent; }

/* Editor split layout */
.json-editor-layout {
  display: grid;
  grid-template-columns: 1fr 44px 1fr;
  flex: 1;
  min-height: 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-mantle);
}

.editor-pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.pane-label {
  flex-shrink: 0;
  padding: .45rem 1rem;
  font-size: .6375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--c-overlay0);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--c-crust);
}

.json-textarea {
  flex: 1;
  border: none;
  border-right: 1px solid var(--border-subtle);
  border-radius: 0;
  resize: none;
  height: 100%;
  min-height: 0;
  padding: 1rem;
}

.json-textarea:focus {
  box-shadow: none;
  border-color: var(--border-subtle);
  border-right-color: var(--c-blue);
}

/* Gutter between panes */
.editor-gutter {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .5rem;
  background: var(--c-crust);
  border-right: 1px solid var(--border-subtle);
}

.gutter-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--c-surface0);
  color: var(--c-overlay1);
  transition: all var(--dur) var(--ease);
}

.gutter-btn:hover {
  color: var(--c-blue);
  border-color: var(--c-blue);
  background: color-mix(in srgb, var(--c-blue) 10%, transparent);
}

.gutter-btn svg { width: 13px; height: 13px; }

/* Tree pane */
.tree-scroll {
  flex: 1;
  overflow: auto;
  padding: .875rem 1rem;
  min-height: 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: .8125rem;
  line-height: 1.6;
}

.tree-placeholder {
  color: var(--c-overlay0);
  font-family: 'Inter', sans-serif;
  font-size: .875rem;
  padding: 1rem;
  text-align: center;
}

.tree-placeholder strong { color: var(--c-blue); font-weight: 600; }

/* ── Tree nodes ────────────────────────────────────────────────── */
.tree-node { user-select: none; }

.tree-row {
  display: flex;
  align-items: baseline;
  min-height: 22px;
  border-radius: var(--r-sm);
  padding: 0 2px;
}

.tree-row:hover { background: var(--c-surface0); }

.tree-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  flex-shrink: 0;
  cursor: pointer;
  color: var(--c-overlay0);
  font-size: .65rem;
  line-height: 1;
  transition: color var(--dur) var(--ease);
  padding-top: 2px;
}

.tree-toggle:hover { color: var(--c-text); }

.tree-spacer {
  display: inline-block;
  width: 16px;
  flex-shrink: 0;
}

.tree-children {
  padding-left: 16px;
  border-left: 1px solid var(--c-surface1);
  margin-left: 7px;
}

.tree-key    { color: var(--syn-key); }
.tree-colon  { color: var(--c-overlay0); margin: 0 .2rem 0 0; }
.tree-bracket { color: var(--syn-bracket); }
.tree-count  { color: var(--c-overlay0); font-size: .7rem; margin: 0 .3rem; }
.tree-close-row { color: var(--syn-bracket); padding: 1px 0 1px 2px; }

.tree-summary { color: var(--c-overlay0); font-size: .72rem; font-style: italic; }
.hidden { display: none !important; }

.tv-string  { color: var(--syn-string); }
.tv-number  { color: var(--syn-number); }
.tv-boolean { color: var(--syn-boolean); }
.tv-null    { color: var(--syn-null); }

/* ═══════════════════════════════════════════════════════════════
   BASE64
   ══════════════════════════════════════════════════════════════ */
.b64-options-bar {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  padding: .75rem 1rem;
  background: var(--c-mantle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  flex-wrap: wrap;
}

.options-group {
  display: flex;
  align-items: center;
  gap: .625rem;
}

.options-label {
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--c-overlay1);
  white-space: nowrap;
}

.pill-group {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.pill {
  padding: .25rem .65rem;
  background: transparent;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--c-subtext0);
  font-size: .75rem;
  font-weight: 500;
  transition: all var(--dur) var(--ease);
}

.pill:last-child { border-right: none; }

.pill:hover { color: var(--c-text); background: var(--c-surface0); }

.pill.active {
  background: var(--c-blue);
  color: var(--c-crust);
  font-weight: 600;
}

[data-theme="light"] .pill.active { color: #fff; }

/* B64 layout */
.b64-layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: start;
}

@media (max-width: 720px) {
  .b64-layout {
    grid-template-columns: 1fr;
  }
  .b64-controls { flex-direction: row; justify-content: center; padding-top: 0; }
}

.b64-pane { display: flex; flex-direction: column; gap: .25rem; }

.b64-textarea { min-height: 220px; resize: vertical; }
.b64-output   { color: var(--c-subtext1); }

.b64-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .625rem;
  padding-top: 1.75rem;
}

.action-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .3rem;
  padding: .7rem .9rem;
  width: 76px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--c-surface0);
  color: var(--c-subtext1);
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  transition: all var(--dur) var(--ease);
}

.action-pill svg { width: 18px; height: 18px; }

.action-pill:hover {
  color: var(--c-blue);
  border-color: var(--c-blue);
  background: color-mix(in srgb, var(--c-blue) 10%, transparent);
}

.action-pill--secondary:hover {
  color: var(--c-teal);
  border-color: var(--c-teal);
  background: color-mix(in srgb, var(--c-teal) 10%, transparent);
}

.char-count {
  font-size: .7rem;
  color: var(--c-overlay0);
  font-family: 'JetBrains Mono', monospace;
}

/* ─── Copy feedback tooltip ───────────────────────────────────── */
.copy-flash {
  position: relative;
}

.copy-flash::after {
  content: 'Copied!';
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--c-green);
  color: var(--c-crust);
  font-family: 'Inter', sans-serif;
  font-size: .7rem;
  font-weight: 600;
  padding: .18rem .5rem;
  border-radius: var(--r-sm);
  white-space: nowrap;
  pointer-events: none;
  z-index: 9999;
  animation: tooltipFade 1.4s var(--ease) forwards;
}

@keyframes tooltipFade {
  0%   { opacity: 0; transform: translateX(-50%) translateY(4px); }
  15%  { opacity: 1; transform: translateX(-50%) translateY(0); }
  70%  { opacity: 1; }
  100% { opacity: 0; }
}

/* ─── Responsive tweaks ───────────────────────────────────────── */
@media (max-width: 900px) {
  /* Icon-only tabs — accessible name preserved via aria-label */
  .tab-btn { padding: .45rem .55rem; gap: 0; }
  .tab-label { display: none; }
  .json-editor-layout {
    grid-template-columns: 1fr 36px 1fr;
  }
}

@media (max-width: 600px) {
  /* Header: keep brand mark, drop wordmark; honor the notch */
  .header-inner {
    gap: .4rem;
    padding-left: max(.75rem, env(safe-area-inset-left));
    padding-right: max(.75rem, env(safe-area-inset-right));
  }
  .logo-name { display: none; }
  .tab-nav { gap: .15rem; }
  .tab-btn { padding: .5rem .5rem; }
  .tab-btn svg { width: 18px; height: 18px; }

  .main-content {
    padding-top: .875rem;
    padding-bottom: calc(1.5rem + env(safe-area-inset-bottom));
    padding-left: max(1rem, env(safe-area-inset-left));
    padding-right: max(1rem, env(safe-area-inset-right));
  }

  /* Let the JSON panel grow & scroll instead of locking to viewport
     height — two tiny stacked panes are unusable on a phone. */
  .panel-inner--fill { height: auto; }
  .json-editor-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 300px 40px 300px;
  }
  .editor-gutter {
    flex-direction: row;
    justify-content: center;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
  .json-textarea {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }

  /* Toolbar wraps; status chip drops to its own full-width row */
  .json-toolbar { gap: .3rem; }
  .toolbar-center { order: 3; width: 100%; margin: 0; }
  .json-subnav { flex-wrap: wrap; }

  /* 16px inputs stop iOS Safari auto-zooming on focus */
  .code-input,
  .jwt-textarea { font-size: 16px; }

  /* Comfortable tap targets */
  .btn,
  .gutter-btn,
  .pill { min-height: 36px; }
  .gutter-btn { min-width: 36px; }
}