/* ═══════════════════════════════════════════
   PEPPY DEV TOOLS — COMBINED — style.css
═══════════════════════════════════════════ */

/* ── CSS Variables ── */
:root {
  --page-bg:  #f4f4f5;
  --bg:       #ffffff;
  --bg2:      #f0f0f0;
  --bg3:      #f8f8f8;
  --border:   #d4d4d4;
  --text:     #1e1e1e;
  --text2:    #555555;
  --accent:   #5646F5;
  --accent2:  #4535e0;
  --accent-light: rgba(86,70,245,0.10);
  --sidebar:  #ececf1;
  /* tool-variable aliases */
  --surface:  #ffffff;
  --surface2: #f0f0f0;
  --et-bg:    #ffffff;
  --et-bg2:   #f0f0f0;
  --et-bg3:   #f8f8f8;
  --et-border: #d4d4d4;
  --et-text:  #1e1e1e;
  --et-text2: #555555;
  --et-accent: #5646F5;
  --et-accent2: #4535e0;
  --et-sidebar: #ececf1;
  --statusbar-bg: #5646F5;
  --statusbar-border: #4535e0;
  /* regex match colors */
  --match-bg:     rgba(255,214,0,0.55);
  --match-bg-alt: rgba(255,160,0,0.45);
  --match-outline: #e6a800;
}

[data-theme="dark"] {
  --page-bg:  #141416;
  --bg:       #1e1e1e;
  --bg2:      #252526;
  --bg3:      #2d2d30;
  --border:   #3e3e42;
  --text:     #cccccc;
  --text2:    #888888;
  --accent:   #8b83f7;
  --accent2:  #5646F5;
  --accent-light: rgba(139,131,247,0.12);
  --sidebar:  #252526;
  --surface:  #1e1e1e;
  --surface2: #252526;
  --et-bg:    #1e1e1e;
  --et-bg2:   #252526;
  --et-bg3:   #2d2d30;
  --et-border: #3e3e42;
  --et-text:  #cccccc;
  --et-text2: #888888;
  --et-accent: #8b83f7;
  --et-accent2: #5646F5;
  --et-sidebar: #252526;
  --statusbar-bg: #3c2fd4;
  --statusbar-border: #2d1fa8;
  --match-bg:     rgba(255,214,0,0.30);
  --match-bg-alt: rgba(255,160,0,0.28);
  --match-outline: #c49200;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Body ── */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background: var(--page-bg);
  font-size: 14px;
  color: var(--text);
}
[data-theme="dark"] body { background: var(--page-bg); color: var(--text); }

/* ── Top Bar ── */
.top-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  height: 44px;
  background: #5646F5;
  color: #fff;
  flex-shrink: 0;
  z-index: 20;
}
.top-bar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.top-bar-back {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 1.1rem;
  line-height: 1;
}
.top-bar-back:hover { color: #fff; }
.top-bar-title {
  font-size: 0.95rem;
  font-weight: 600;
  white-space: nowrap;
}
.top-bar-right {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.top-btn {
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}
.top-btn:hover { background: rgba(255,255,255,0.3); }

/* ── App Body ── */
.app-body {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* ── Sidebar ── */
.sidebar {
  width: 210px;
  min-width: 180px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow-y: hidden;
  flex-shrink: 0;
}
[data-theme="dark"] .sidebar { background: var(--surface); border-right-color: var(--border); }

/* ── Sidebar Top Group Nav ── */
.sidebar-top-nav {
  display: flex;
  gap: 2px;
  padding: 7px 6px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: var(--surface2);
}
.grp-nav-btn {
  flex: 1;
  padding: 6px 2px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  text-align: center;
  color: var(--text2);
  transition: background 0.15s;
  min-width: 0;
  background: none;
  border: 1px solid transparent;
  font-family: inherit;
}
.grp-nav-btn:hover  { background: var(--accent-light); color: var(--accent); }
.grp-nav-btn.active { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }

/* ── Sidebar Groups (scrollable container) ── */
.sidebar-groups {
  flex: 1;
  overflow-y: auto;
}

/* ── Group Header (collapsible toggle button) ── */
.grp-hdr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 14px 5px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--text2);
  cursor: pointer;
  user-select: none;
  background: none;
  border: none;
  font-family: inherit;
  text-align: left;
  transition: color 0.15s;
}
.grp-hdr:hover { color: var(--accent); }
.grp-chevron {
  font-size: 8px;
  flex-shrink: 0;
  margin-left: 4px;
  transition: transform 0.2s ease;
}
.sidebar-group.collapsed .grp-chevron { transform: rotate(-90deg); }
.sidebar-group.collapsed .grp-tools   { display: none; }

.sidebar-group + .sidebar-group {
  border-top: 1px solid var(--border);
}

.tab-btn {
  width: 100%;
  padding: 7px 12px 7px 22px;
  text-align: left;
  background: none;
  border: none;
  border-radius: 0;
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
  font-family: inherit;
  transition: background 0.12s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tab-btn:hover  { background: var(--accent-light); color: var(--accent); }
.tab-btn.active { background: var(--accent); color: #fff; font-weight: 600; }
[data-theme="dark"] .tab-btn { color: var(--text); }
[data-theme="dark"] .tab-btn:hover  { background: var(--accent-light); color: var(--accent); }
[data-theme="dark"] .tab-btn.active { background: var(--accent); color: #fff; }

/* ── Tool Area ── */
.tool-area {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}
[data-theme="dark"] .tool-area { background: var(--bg); }

.tool-panel {
  display: none;
  flex-direction: column;
  gap: 14px;
  flex: 1;
  overflow-y: auto;
  padding: 22px 24px;
  min-height: 0;
}
.tool-panel.active { display: flex; }

.panel-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
  flex-shrink: 0;
}
.tool-desc {
  font-size: 0.88rem;
  color: var(--text2);
  line-height: 1.5;
  flex-shrink: 0;
}

/* ── Buttons ── */
button {
  padding: 6px 14px;
  border: 1px solid var(--accent2);
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  transition: background 0.15s, opacity 0.15s;
  white-space: nowrap;
}
button:hover { opacity: 0.88; }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-secondary {
  background: var(--bg2) !important;
  border-color: var(--border) !important;
  color: var(--text) !important;
}
.btn-secondary:hover { background: var(--bg3) !important; opacity: 1; }

.copy-btn {
  padding: 4px 10px !important;
  font-size: 12px !important;
  background: var(--bg2) !important;
  border-color: var(--border) !important;
  color: var(--text) !important;
}
.copy-btn:hover {
  background: var(--accent) !important;
  color: #fff !important;
  border-color: var(--accent) !important;
  opacity: 1;
}

[data-theme="dark"] .btn-secondary { background: var(--bg2) !important; border-color: var(--border) !important; color: var(--text) !important; }
[data-theme="dark"] .btn-secondary:hover { background: var(--bg3) !important; }
[data-theme="dark"] .copy-btn { background: var(--bg2) !important; border-color: var(--border) !important; color: var(--text) !important; }

/* Override generic button styles for sidebar / nav controls */
.tab-btn,
.grp-hdr,
.grp-nav-btn,
.theme-toggle {
  background: none !important;
  border: none !important;
  color: inherit !important;
}
.tab-btn:hover  { background: var(--accent-light) !important; color: var(--accent) !important; }
.tab-btn.active { background: var(--accent) !important; border: none !important; color: #fff !important; font-weight: 600; }
.grp-hdr:hover  { color: var(--accent) !important; }
.grp-nav-btn:hover  { background: var(--accent-light) !important; color: var(--accent) !important; border: 1px solid transparent !important; }
.grp-nav-btn.active { background: var(--accent-light) !important; border: 1px solid var(--accent) !important; color: var(--accent) !important; }
.theme-toggle {
  background: rgba(255,255,255,0.2) !important;
  border: 1px solid rgba(255,255,255,0.4) !important;
  color: #fff !important;
  border-radius: 14px !important;
}
.theme-toggle:hover { background: rgba(255,255,255,0.35) !important; }

/* ── Form Elements ── */
.form-group { display: flex; flex-direction: column; gap: 6px; flex-shrink: 0; }
.form-row   { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; flex-shrink: 0; }
.btn-row    { display: flex; gap: 8px; flex-wrap: wrap; flex-shrink: 0; align-items: center; }

.io-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.io-area {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  line-height: 1.5;
  resize: vertical;
}
.io-area:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(86,70,245,0.15); }
.io-area.single { flex: none; height: 120px; resize: vertical; }
.io-area.large  { flex: 1; resize: none; min-height: 120px; }
[data-theme="dark"] .io-area { background: var(--bg); color: var(--text); border-color: var(--border); }

.io-footer { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-shrink: 0; }
.io-wrap   { display: flex; gap: 12px; flex: 1; min-height: 0; }
.io-col    { flex: 1; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.io-btns   { display: flex; flex-direction: column; gap: 8px; justify-content: center; flex-shrink: 0; padding-top: 20px; }

select,
input[type="number"],
.short-input,
.short-num {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  font-family: inherit;
}
select { cursor: pointer; }
select:focus,
input[type="number"]:focus,
.short-input:focus,
.short-num:focus { border-color: var(--accent); }
.short-input,
.short-num { width: 70px; }

input[type="range"] { width: 100%; accent-color: var(--accent); cursor: pointer; }
input[type="color"] {
  width: 44px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px;
  cursor: pointer;
  background: var(--bg);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
  user-select: none;
}
.checkbox-group { display: flex; flex-direction: column; gap: 8px; flex-shrink: 0; }
.radio-group    { display: flex; gap: 14px; flex-wrap: wrap; }
.radio-group label { display: flex; align-items: center; gap: 5px; font-size: 13px; cursor: pointer; color: var(--text); font-weight: normal; }

/* ── Tool Messages ── */
.tool-msg      { font-size: 12px; color: var(--accent); }
.tool-msg.err  { color: #c00; }
.tool-msg.ok   { color: #090; }

/* ── Status Bar ── */
.statusbar {
  display: flex;
  align-items: center;
  background: var(--statusbar-bg);
  color: #fff;
  font-size: 12px;
  flex-shrink: 0;
  border-top: 1px solid var(--statusbar-border);
}
.statusbar span {
  padding: 3px 14px;
  border-right: 1px solid rgba(255,255,255,0.25);
  white-space: nowrap;
  opacity: 0.92;
}

/* ═══════════════════════════════════════════
   ENCODING TOOLS SPECIFIC
═══════════════════════════════════════════ */
.result-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  flex-shrink: 0;
}
[data-theme="dark"] .result-box { background: var(--bg2); border-color: var(--border); }

.hash-result-row { display: flex; gap: 8px; align-items: center; }

.result-input {
  flex: 1;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  outline: none;
}
[data-theme="dark"] .result-input { background: var(--bg); color: var(--text); border-color: var(--border); }
[data-theme="dark"] .short-input  { background: var(--bg); color: var(--text); border-color: var(--border); }

.pwd-strength {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}
.strength-bar {
  width: 160px;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
#strength-fill {
  height: 100%;
  width: 0;
  border-radius: 3px;
  transition: width 0.3s, background 0.3s;
}
#strength-label { font-size: 12px; color: var(--text2); }

.jwt-parts { display: flex; flex-direction: column; gap: 12px; overflow-y: auto; }
.jwt-section { display: flex; flex-direction: column; gap: 4px; }
.jwt-section-hdr {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 3px 3px 0 0;
  color: #fff;
}
.header-hdr  { background: #7c3aed; }
.payload-hdr { background: #0369a1; }
.sig-hdr     { background: #dc2626; }
.jwt-pre {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 3px 3px;
  padding: 10px 12px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--text);
  margin: 0;
}
.jwt-sig-note {
  padding: 8px 12px;
  font-size: 12px;
  color: var(--text2);
  background: var(--bg2);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 3px 3px;
}
[data-theme="dark"] .jwt-pre      { background: var(--bg2); border-color: var(--border); color: var(--text); }
[data-theme="dark"] .jwt-sig-note { background: var(--bg2); border-color: var(--border); color: var(--text2); }

/* ═══════════════════════════════════════════
   QR / BARCODE SPECIFIC
═══════════════════════════════════════════ */
.qr-layout {
  display: flex;
  gap: 20px;
  flex: 1;
  min-height: 0;
}
.qr-controls {
  width: 280px;
  min-width: 220px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}
.qr-preview {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--border);
  border-radius: 8px;
  background: #ffffff;
  padding: 20px;
  min-height: 200px;
  overflow: auto;
}
[data-theme="dark"] .qr-preview { background: #ffffff; }
#qr-output canvas, #qr-output img { display: block; border-radius: 4px; }
.qr-hint { color: #999; font-size: 13px; text-align: center; pointer-events: none; }
.qr-textarea { height: 80px; resize: vertical; }
.slider-row { display: flex; align-items: center; gap: 10px; }
.slider-row input[type="range"] { flex: 1; }
.color-pair { display: flex; gap: 20px; align-items: flex-end; flex-wrap: wrap; }
.io-input {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  font-family: inherit;
}
.io-input:focus { border-color: var(--accent); }
#bc-output { display: block; max-width: 100%; }

/* ═══════════════════════════════════════════
   TEXT TOOLS SPECIFIC
═══════════════════════════════════════════ */
.diff-inputs { display: flex; gap: 12px; flex-shrink: 0; }
.diff-inputs .io-col { flex: 1; }
.diff-inputs .io-area { height: 130px; resize: vertical; }
.diff-stats { font-size: 12px; color: var(--text2); flex-shrink: 0; }
.diff-stats .added-stat   { color: #1a7a1a; font-weight: 700; }
.diff-stats .removed-stat { color: #c00;    font-weight: 700; }
[data-theme="dark"] .diff-stats .added-stat   { color: #4caf50; }
[data-theme="dark"] .diff-stats .removed-stat { color: #ef5350; }
.diff-output {
  display: flex;
  gap: 8px;
  flex: 1;
  min-height: 0;
}
.diff-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.diff-panel-hdr {
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 700;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.diff-content {
  flex: 1;
  overflow: auto;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 12px;
}
.diff-line { display: flex; min-height: 18px; white-space: pre; }
.diff-ln {
  padding: 1px 6px;
  min-width: 36px;
  text-align: right;
  flex-shrink: 0;
  color: var(--text2);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  user-select: none;
}
.diff-text { padding: 1px 8px; flex: 1; overflow: hidden; }
.diff-line.removed          { background: rgba(200,0,0,0.10); }
.diff-line.removed .diff-ln { background: rgba(200,0,0,0.18); }
.diff-line.added            { background: rgba(0,160,0,0.10); }
.diff-line.added   .diff-ln { background: rgba(0,160,0,0.18); }
.diff-line.empty            { background: var(--bg3); opacity: 0.6; }
.diff-line.empty   .diff-ln { background: var(--bg3); }
[data-theme="dark"] .diff-line.removed          { background: rgba(200,50,50,0.18); }
[data-theme="dark"] .diff-line.removed .diff-ln { background: rgba(200,50,50,0.30); }
[data-theme="dark"] .diff-line.added            { background: rgba(40,160,40,0.18); }
[data-theme="dark"] .diff-line.added   .diff-ln { background: rgba(40,160,40,0.30); }
.rand-result { display: flex; flex-direction: column; gap: 6px; flex: 1; min-height: 0; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px,1fr));
  gap: 10px;
  margin-bottom: 12px;
}
.stat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 14px 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  gap: 4px;
}
.stat-val  { font-size: 1.55rem; font-weight: 700; color: var(--accent); line-height: 1; }
.stat-lbl  { font-size: 0.72rem; color: var(--text2); text-align: center; }
.freq-list { display: flex; flex-direction: column; gap: 4px; }
.freq-row  { display: flex; align-items: center; gap: 8px; }
.freq-word { font-size: 13px; min-width: 100px; font-weight: 600; color: var(--text); }
.freq-bar-wrap { flex: 1; height: 10px; background: var(--bg2); border-radius: 5px; overflow: hidden; }
.freq-bar  { height: 100%; background: var(--accent); border-radius: 5px; transition: width 0.3s; }
.freq-count { font-size: 12px; color: var(--text2); min-width: 28px; text-align: right; }

/* ═══════════════════════════════════════════
   JSON / YAML / XML SPECIFIC
═══════════════════════════════════════════ */
.full-io { flex: 1; min-height: 0; display: flex; flex-direction: column; gap: 6px; }
.full-io .io-area { flex: 1; resize: none; }
.tree-container {
  flex: 1;
  min-height: 0;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px 16px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.65;
  background: var(--bg);
}
.jt-node     { display: block; }
.jt-line     { display: flex; align-items: baseline; flex-wrap: nowrap; }
.jt-children { padding-left: 20px; border-left: 1px dashed var(--border); margin-left: 7px; }
.jt-close    { color: var(--text); }
.jt-toggle {
  background: none;
  border: none !important;
  padding: 0 2px;
  font-size: 10px;
  color: var(--text2);
  cursor: pointer;
  line-height: 1;
  width: 14px;
  flex-shrink: 0;
  font-family: monospace;
  opacity: 1 !important;
}
.jt-toggle:hover { color: var(--accent); }
.jt-key     { color: #9c27b0; }
.jt-colon   { color: var(--text); margin: 0 1px; }
.jt-string  { color: #1d7a1d; }
.jt-number  { color: #1565c0; }
.jt-boolean { color: #c55a11; }
.jt-null    { color: #757575; font-style: italic; }
.jt-bracket { color: var(--text); }
.jt-count   { color: var(--text2); font-size: 11px; font-style: italic; margin-left: 6px; user-select: none; }
[data-theme="dark"] .jt-key     { color: #ce93d8; }
[data-theme="dark"] .jt-string  { color: #81c784; }
[data-theme="dark"] .jt-number  { color: #90caf9; }
[data-theme="dark"] .jt-boolean { color: #ffcc80; }
.validator-result {
  padding: 12px 14px;
  border-radius: 4px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.5;
  flex-shrink: 0;
}
.validator-result.ok  { background: #e8f5e9; border: 1px solid #81c784; color: #1b5e20; }
.validator-result.err { background: #ffebee; border: 1px solid #ef9a9a; color: #b71c1c; }
[data-theme="dark"] .validator-result.ok  { background: #1b3a1d; border-color: #4caf50; color: #a5d6a7; }
[data-theme="dark"] .validator-result.err { background: #3d1212; border-color: #ef5350; color: #ef9a9a; }

/* ═══════════════════════════════════════════
   COLOR TOOLS SPECIFIC
═══════════════════════════════════════════ */
.convert-grid { display: flex; flex-direction: column; gap: 10px; max-width: 500px; }
.convert-row  { display: flex; align-items: center; gap: 10px; }
.fmt-label { font-size: 12px; font-weight: 700; min-width: 48px; color: var(--text2); }
.fmt-input {
  flex: 1;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: Consolas, monospace;
  font-size: 13px;
  background: var(--bg2);
  color: var(--text);
  outline: none;
}
.fmt-input:focus { border-color: var(--accent); }
.color-swatch {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.color-preview-bar {
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-top: 8px;
  max-width: 500px;
}
.picker-wrap { display: flex; align-items: center; gap: 16px; }
#color-picker { width: 80px; height: 80px; border: none; border-radius: 10px; cursor: pointer; background: none; padding: 0; }
.picked-preview { width: 80px; height: 80px; border-radius: 10px; border: 1px solid var(--border); background: #5646F5; }
.picked-vals { display: flex; flex-direction: column; gap: 8px; max-width: 480px; }
.pv-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  background: var(--bg2);
  border-radius: 6px;
}
.pv-lbl { font-size: 12px; font-weight: 700; color: var(--text2); min-width: 56px; }
.pv-val { flex: 1; font-family: Consolas, monospace; font-size: 13px; color: var(--text); }
.contrast-inputs { display: flex; gap: 24px; flex-wrap: wrap; }
.ci-group { display: flex; flex-direction: column; gap: 6px; }
.ci-row { display: flex; align-items: center; gap: 8px; }
.ci-row input[type="color"] { width: 44px; height: 36px; border: none; border-radius: 6px; cursor: pointer; padding: 0; }
.contrast-preview {
  padding: 20px 24px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid var(--border);
  min-height: 72px;
  display: flex;
  align-items: center;
}
.contrast-results { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.cr-ratio { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.cr-ratio-val { font-size: 2.5rem; font-weight: 800; color: var(--accent); }
.cr-ratio-lbl { font-size: 12px; color: var(--text2); }
.cr-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.cr-badge {
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text2);
}
.cr-badge.pass { background: #d4f5d4; border-color: #4caf50; color: #1a6b1a; }
.cr-badge.fail { background: #fde8e8; border-color: #f44336; color: #8b1a1a; }
[data-theme="dark"] .cr-badge.pass { background: #1a3d1a; border-color: #4caf50; color: #8be88b; }
[data-theme="dark"] .cr-badge.fail { background: #3d1a1a; border-color: #f44336; color: #f07070; }
.palette-controls { display: flex; flex-direction: column; gap: 12px; max-width: 480px; }
.palette-swatches { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.pal-swatch { display: flex; flex-direction: column; align-items: center; gap: 5px; }
.pal-swatch-box {
  width: 72px;
  height: 72px;
  border-radius: 10px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform 0.15s;
}
.pal-swatch-box:hover { transform: scale(1.08); }
.pal-swatch-hex { font-size: 11px; font-family: Consolas, monospace; color: var(--text2); }

/* ═══════════════════════════════════════════
   TIMESTAMP TOOLS SPECIFIC
═══════════════════════════════════════════ */
.ts-section { margin-bottom: 18px; }
.ts-group-hdr {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}
.divider { border: none; border-top: 1px solid var(--border); margin: 18px 0; }
.ts-input {
  flex: 1;
  min-width: 200px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg2);
  color: var(--text);
  font-size: 0.88rem;
  font-family: inherit;
  outline: none;
}
.ts-input:focus { border-color: var(--accent); outline: 2px solid var(--accent); }
.ts-input-sm {
  width: 140px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg2);
  color: var(--text);
  font-size: 0.88rem;
  font-family: inherit;
  outline: none;
}
.ts-input-sm:focus { border-color: var(--accent); }
.ts-num {
  width: 70px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg2);
  color: var(--text);
  font-size: 0.88rem;
  font-family: inherit;
  outline: none;
}
.ts-num:focus { border-color: var(--accent); }
.ts-select {
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg2);
  color: var(--text);
  font-size: 0.88rem;
  cursor: pointer;
  font-family: inherit;
  outline: none;
}
.ts-select:focus { border-color: var(--accent); }
.form-hint { font-size: 0.78rem; color: var(--text2); }
.ts-results {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 0;
  margin-top: 10px;
}
.ts-result-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-bottom: 1px solid var(--border);
}
.ts-result-row:last-child { border-bottom: none; }
.ts-res-lbl {
  width: 155px;
  flex-shrink: 0;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text2);
}
.ts-res-val {
  flex: 1;
  font-family: Consolas, monospace;
  font-size: 0.88rem;
  color: var(--text);
  word-break: break-all;
}

/* ═══════════════════════════════════════════
   REGEX TESTER SPECIFIC
═══════════════════════════════════════════ */
.pattern-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  flex-shrink: 0;
}
.pattern-slash { font-size: 1.2rem; color: var(--accent); font-weight: 700; user-select: none; }
.pattern-input {
  flex: 1;
  border: none !important;
  background: transparent !important;
  color: var(--text) !important;
  font-family: Consolas, monospace;
  font-size: 0.95rem;
  outline: none;
  padding: 0 !important;
}
.pattern-err { color: #e53935; font-size: 0.8rem; min-height: 1.2em; flex-shrink: 0; }
.flag-box {
  display: flex;
  align-items: center;
  gap: 3px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text2);
  cursor: pointer;
  user-select: none;
  padding: 2px 6px;
  border-radius: 4px;
}
.flag-box:has(input:checked) { background: var(--accent-light); color: var(--accent); }
.flag-box input { cursor: pointer; accent-color: var(--accent); }
.io-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; flex: 1; min-height: 0; }
.io-hdr {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
}
.rt-area {
  flex: 1;
  min-height: 180px;
  resize: vertical;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  color: var(--text);
  font-family: Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.6;
  outline: none;
}
.rt-area:focus { outline: 2px solid var(--accent); }
.hl-box {
  flex: 1;
  min-height: 180px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  font-family: Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
  overflow-y: auto;
  color: var(--text);
}
.hl-box mark {
  background: var(--match-bg);
  color: inherit;
  border-radius: 2px;
  outline: 1px solid var(--match-outline);
  padding: 0 1px;
}
.hl-box mark.alt { background: var(--match-bg-alt); }
.match-summary { font-size: 0.82rem; color: var(--text2); margin-top: 6px; min-height: 1.2em; flex-shrink: 0; }
.match-summary strong { color: var(--accent); }
.match-info {
  margin-top: 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}
.match-info-hdr {
  background: var(--bg3);
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.match-groups-content { padding: 10px 14px; max-height: 200px; overflow-y: auto; }
.mg-entry { margin-bottom: 8px; }
.mg-title { font-size: 0.78rem; font-weight: 700; color: var(--accent); margin-bottom: 3px; }
.mg-row { display: flex; gap: 6px; font-size: 0.82rem; align-items: baseline; flex-wrap: wrap; }
.mg-idx { color: var(--text2); min-width: 28px; }
.mg-val { font-family: Consolas, monospace; background: var(--bg3); border-radius: 3px; padding: 1px 6px; color: var(--text); }
.ref-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px,1fr)); gap: 14px; }
.ref-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.ref-card-hdr {
  background: var(--accent-light);
  padding: 8px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.ref-table { width: 100%; border-collapse: collapse; }
.ref-table tr { border-bottom: 1px solid var(--border); }
.ref-table tr:last-child { border-bottom: none; }
.ref-table td { padding: 5px 14px; font-size: 0.85rem; }
.ref-pat { font-family: Consolas, monospace; color: var(--accent); width: 150px; white-space: nowrap; }

/* ═══════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════ */

/* ── Hamburger menu button (hidden on desktop, shown on mobile) ── */
.menu-toggle { display: none; }

/* ── Sidebar overlay for mobile ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
}
.sidebar-overlay.active { display: block; }

@media (max-width: 768px) {
  .menu-toggle { display: inline-flex; }
  .sidebar {
    position: fixed;
    top: 0;
    left: -280px;
    width: 260px;
    min-width: unset;
    height: 100vh;
    z-index: 100;
    transition: left 0.3s ease;
    box-shadow: 4px 0 20px rgba(0,0,0,0.3);
    border-right: none;
  }
  .sidebar.open { left: 0; }
  .sidebar-top-nav { flex-wrap: wrap; }
  .io-grid { grid-template-columns: 1fr; }
  .ref-grid { grid-template-columns: 1fr; }
  .qr-layout { flex-direction: column; }
  .tool-panel { padding: 16px; }
  .btn-row { flex-wrap: wrap; gap: 8px; }
}

@media (max-width: 480px) {
  .app-header h1 { font-size: 0.9rem; }
  .app-header { padding: 6px 10px; }
  .tool-panel { padding: 12px 10px; }
  .panel-title { font-size: 1rem; }
  textarea { font-size: 12px; }
  .diff-wrap { flex-direction: column; }
  .diff-col { min-height: 200px; }
}