/* =========================================================
   DaysToEvents Tools — Core Styles (Approved Design System)
   ========================================================= */

/* Theme Variables for Tools Page */
[data-theme="light"] body.tools-page {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --border: rgba(15, 23, 42, 0.08);
  --text: #111827;
  --text-2: #5b6675;
  --text-3: #8b93a7;
  --primary: #6c5ce7;
  --primary-hover: #5a4bcf;
  --radius: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --ease: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] body.tools-page {
  --bg: #07111d;
  --surface: #0d1a29;
  --surface-2: #132235;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f5f7fa;
  --text-2: #9aacbf;
  --text-3: #6c7d93;
  --primary: #6c5ce7;
  --primary-hover: #5a4bcf;
  --radius: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --ease: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

body.tools-page {
  font-family: var(--font, 'Inter', -apple-system, BlinkMacSystemFont, sans-serif);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.tools-main {
  background: var(--bg);
  min-height: 80vh;
  padding-bottom: 3.5rem;
}

/* ─── Hero Section (Cinematic Dark in BOTH Light & Dark Modes) ─── */
.tools-hero {
  background-color: #07111d !important;
  color: #f5f7fa !important;
  min-height: 240px;
  padding: 3.5rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.tools-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 200%;
  background: radial-gradient(circle, rgba(108, 92, 231, 0.15) 0%, transparent 65%);
  pointer-events: none;
}

[data-theme="light"] .tools-hero,
[data-theme="dark"] .tools-hero {
  background-color: #07111d !important;
  color: #f5f7fa !important;
}

[data-theme="light"] .tools-hero .cat-title,
[data-theme="dark"] .tools-hero .cat-title {
  color: #ffffff !important;
  font-size: clamp(2.2rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0.5rem 0;
}

[data-theme="light"] .tools-hero .cat-desc,
[data-theme="dark"] .tools-hero .cat-desc {
  color: #9aacbf !important;
  font-size: 1rem;
  max-width: 640px;
  margin: 0;
  line-height: 1.6;
}

/* Breadcrumb */
.tools-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-2);
  margin-bottom: 1.5rem;
}

.tools-breadcrumb a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--ease);
}

.tools-breadcrumb a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* Container */
.tools-content {
  margin-top: 2rem;
}

/* Grid on Index */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 768px) {
  .tools-grid {
    grid-template-columns: 1fr;
  }
}

.tool-category {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.03);
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.tool-category:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.tool-category h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tool-category-description {
  font-size: 0.88rem;
  color: var(--text-2);
  margin: 0 0 1.25rem;
  line-height: 1.5;
}

.tool-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.tool-link,
.tool-link-disabled {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--ease);
}

.tool-link {
  color: var(--text);
  background: var(--surface-2);
}

.tool-link:hover {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 8%, var(--surface-2));
  color: var(--primary);
  transform: translateX(2px);
}

.tool-link .tool-arrow {
  color: var(--primary);
  font-weight: 700;
}

.tool-link-disabled {
  color: var(--text-3);
  background: var(--surface);
  opacity: 0.7;
}

.tool-status {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  background: var(--surface-2);
  color: var(--text-3);
  border: 1px solid var(--border);
}

/* ─── Detail Page Card & Panels ─── */
.tool-page-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.03);
  padding: 2rem 2.25rem;
  box-sizing: border-box;
  margin-bottom: 2rem;
}

@media (max-width: 600px) {
  .tool-page-card {
    padding: 1.25rem 1rem;
    border-radius: 14px;
  }
}

.calculator-section {
  border-top: 1px solid var(--border);
  padding-top: 1.75rem;
  margin-top: 1.75rem;
}

.calculator-section:first-of-type {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}

.calculator-section h2 {
  font-size: 1.25rem;
  font-weight: 750;
  margin: 0 0 1.25rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.calculator-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 650px) {
  .calculator-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.input-group label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-2);
}

input[type="date"],
input[type="number"],
input[type="time"],
input[type="text"],
select {
  width: 100%;
  height: 46px;
  min-height: 46px;
  box-sizing: border-box;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.95rem;
  background-color: var(--surface-2);
  outline: none;
  color: var(--text);
  transition: border-color var(--ease), box-shadow var(--ease);
}

input[type="date"],
input[type="time"] {
  cursor: pointer;
}

input[type="date"]::-webkit-calendar-picker-indicator,
input[type="time"]::-webkit-calendar-picker-indicator {
  cursor: pointer;
  opacity: 0.85;
  padding: 4px;
  border-radius: 4px;
  transition: opacity var(--ease), background-color var(--ease);
}

/* =========================================================
   DaysToEvents — Custom Date Picker Styles
   ========================================================= */
.dp-container {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.dp-container.dp-active {
  z-index: 10000 !important;
  position: relative !important;
}

.dp-input {
  width: 100%;
  padding-right: 2.75rem !important;
  cursor: pointer !important;
}

.dp-icon-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.1rem;
  padding: 6px 8px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  opacity: 0.8;
  transition: opacity var(--ease), background-color var(--ease);
}

.dp-icon-btn:hover {
  opacity: 1;
  background-color: color-mix(in srgb, var(--primary) 12%, transparent);
}

.dp-popover {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 10000;
  width: 320px;
  max-width: 90vw;
  background-color: var(--surface, #ffffff);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), 0 4px 12px rgba(0, 0, 0, 0.15);
  padding: 1rem;
  box-sizing: border-box;
  animation: dpFadeIn 0.15s ease-out;
  isolation: isolate;
}

@keyframes dpFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.dp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.dp-nav-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--ease), border-color var(--ease);
}

.dp-nav-btn:hover {
  background-color: color-mix(in srgb, var(--primary) 15%, transparent);
  border-color: var(--primary);
}

.dp-title-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 4px 10px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background-color var(--ease), border-color var(--ease);
}

.dp-title-btn:hover {
  background-color: var(--surface-2);
  border-color: var(--border);
}

.dp-chevron {
  font-size: 0.75rem;
  color: var(--primary);
}

.dp-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.dp-days-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
  margin-bottom: 0.75rem;
}

.dp-day-cell {
  aspect-ratio: 1;
  background: none;
  border: 1px solid transparent;
  color: var(--text);
  font-size: 0.88rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--ease), color var(--ease), border-color var(--ease);
}

.dp-day-cell:hover:not(:disabled) {
  background-color: color-mix(in srgb, var(--primary) 18%, transparent);
}

.dp-day-cell.is-other-month {
  opacity: 0.35;
  cursor: default;
}

.dp-day-cell.is-today {
  border-color: var(--primary);
  font-weight: 700;
}

.dp-day-cell.is-selected {
  background-color: var(--primary);
  color: #ffffff;
  font-weight: 700;
  border-color: var(--primary);
}

.dp-footer {
  display: flex;
  justify-content: flex-end;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.dp-today-btn {
  font-size: 0.82rem;
  padding: 4px 12px;
}

/* Quick Month/Year Selection Panel */
.dp-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.dp-panel-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.dp-panel-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.dp-panel-close-btn:hover {
  color: var(--text);
  background-color: var(--surface-2);
}

.dp-panel-section {
  margin-bottom: 0.75rem;
}

.dp-year-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.4rem;
}

.dp-year-range {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.dp-year-quick-row {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.dp-quick-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.78rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.dp-quick-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.dp-years-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.dp-year-btn,
.dp-month-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.82rem;
  padding: 6px 4px;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  transition: background-color var(--ease), border-color var(--ease), color var(--ease);
}

.dp-year-btn:hover,
.dp-month-btn:hover {
  border-color: var(--primary);
  background-color: color-mix(in srgb, var(--primary) 15%, transparent);
}

.dp-year-btn.is-selected,
.dp-month-btn.is-selected {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  font-weight: 700;
}

.dp-months-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}

input[type="date"]::-webkit-calendar-picker-indicator:hover,
input[type="time"]::-webkit-calendar-picker-indicator:hover {
  opacity: 1;
  background-color: color-mix(in srgb, var(--primary) 15%, transparent);
}

[data-theme="dark"] input[type="date"]::-webkit-calendar-picker-indicator,
[data-theme="dark"] input[type="time"]::-webkit-calendar-picker-indicator {
  filter: invert(0.9) hue-rotate(180deg);
}

input:focus,
select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent);
}

.calculate-btn {
  width: 100%;
  min-height: 46px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}

.result-box {
  margin-top: 1.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  text-align: center;
  min-height: 24px;
  transition: all var(--ease);
}

.result-main {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
}

.result-secondary {
  margin-top: 0.4rem;
  color: var(--text-2);
  font-size: 0.92rem;
  line-height: 1.5;
}

/* ─── Historical Section ─── */
.history-section {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.03);
  padding: 2rem 2.25rem;
  box-sizing: border-box;
  margin-bottom: 2rem;
}

@media (max-width: 600px) {
  .history-section {
    padding: 1.25rem 1rem;
    border-radius: 14px;
  }
}

.history-header {
  margin-bottom: 1.5rem;
}

.history-header h2 {
  margin: 0 0 0.35rem;
  font-size: 1.25rem;
  font-weight: 750;
  color: var(--text);
}

.history-header p {
  margin: 0;
  color: var(--text-2);
  font-size: 0.9rem;
}

.canvas-container {
  position: relative;
  width: 100%;
  height: 220px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.date-label {
  position: absolute;
  top: 42%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-2);
  pointer-events: none;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 12px;
  white-space: nowrap;
}

.cards-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  min-height: 100px;
}

.fact-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text);
  transform: translateY(10px);
  opacity: 0;
  animation: slideUp 0.35s forwards ease-out;
}

@keyframes slideUp {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.fact-card span {
  color: var(--primary);
  font-weight: 700;
  margin-right: 0.4rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  text-align: center;
  margin-bottom: 1.5rem;
  gap: 0.5rem;
}

.stat-item .label {
  font-size: 0.78rem;
  color: var(--text-3);
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  font-weight: 600;
}

.stat-item .value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.tabs-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 4px;
  border-radius: 16px;
  margin-bottom: 1.25rem;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 0.65rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  border-radius: 12px;
  transition: all var(--ease);
}

.tab-btn.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--primary) 30%, transparent);
}

.status-text {
  text-align: center;
  color: var(--text-3);
  font-size: 0.9rem;
  font-style: italic;
}

.status-text.error {
  color: #e53e3e;
}

/* ─── SEO Section ─── */
.tools-seo {
  width: 100%;
  margin-top: 2.5rem;
  padding: 1.75rem 2rem;
  box-sizing: border-box;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.tools-seo-copy h2 {
  font-size: 1.25rem;
  font-weight: 750;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.tools-seo-copy h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 1.5rem 0 0.5rem;
  color: var(--text);
}

.tools-seo-copy p {
  margin: 0;
  color: var(--text-2);
  line-height: 1.65;
  font-size: 0.92rem;
}

.tools-faq {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.tools-faq h2 {
  font-size: 1.2rem;
  font-weight: 750;
  margin: 0 0 1rem;
  color: var(--text);
}

.tools-faq details {
  border-top: 1px solid var(--border);
  padding: 0.85rem 0;
}

.tools-faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
}

.tools-faq summary:hover {
  color: var(--primary);
}

.tools-faq p {
  margin: 0.6rem 0 0;
  color: var(--text-2);
  line-height: 1.65;
  font-size: 0.9rem;
}

/* ─── Global Hidden Attribute Guarantee ─── */
[hidden] {
  display: none !important;
}

/* ─── Custom Date Picker Component ─── */
.custom-date-field {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.custom-date-field .date-display-input {
  width: 100%;
  padding-right: 2.75rem;
}

.custom-date-field .date-picker-button {
  position: absolute;
  right: 0.5rem;
  background: transparent;
  border: none;
  font-size: 1.1rem;
  padding: 0.35rem 0.5rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: transform var(--ease), background-color var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
}

.custom-date-field .date-picker-button:hover {
  background: color-mix(in srgb, var(--primary) 12%, transparent);
}

.date-picker-popup {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 1000;
  width: 290px;
  max-width: calc(100vw - 32px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  padding: 0.85rem;
  box-sizing: border-box;
  animation: fadeInDown 0.15s ease-out;
}

.date-picker-popup[hidden] {
  display: none !important;
}

.date-picker-header {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.date-picker-month,
.date-picker-year {
  flex: 1;
  padding: 0.4rem 0.5rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.date-picker-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  text-align: center;
}

.date-picker-weekday {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-3);
  padding: 0.25rem 0;
  text-transform: uppercase;
}

.date-picker-day {
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.4rem 0;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: background-color var(--ease), color var(--ease);
}

.date-picker-day:hover:not(:disabled) {
  background: color-mix(in srgb, var(--primary) 15%, transparent);
  color: var(--primary);
}

.date-picker-day.selected {
  background: var(--primary) !important;
  color: #ffffff !important;
  font-weight: 700;
}

.date-picker-day:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.date-invalid {
  border-color: #e53e3e !important;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =========================================================
   DaysToEvents — Timezone Combobox Styles
   ========================================================= */
.tz-cb-container {
  position: relative;
  width: 100%;
}

.tz-cb-trigger {
  width: 100%;
  min-height: 46px;
  box-sizing: border-box;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.95rem;
  background-color: var(--surface-2);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  outline: none;
  transition: border-color var(--ease), box-shadow var(--ease);
}

.tz-cb-trigger:hover,
.tz-cb-container.tz-cb-active .tz-cb-trigger {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent);
}

.tz-cb-trigger.is-placeholder .tz-cb-trigger-label {
  color: var(--text-muted);
}

.tz-cb-trigger-arrow {
  font-size: 0.75rem;
  color: var(--primary);
  margin-left: 0.5rem;
  transition: transform 0.15s ease;
}

.tz-cb-container.tz-cb-active .tz-cb-trigger-arrow {
  transform: rotate(180deg);
}

.tz-cb-container.tz-cb-active {
  z-index: 10000 !important;
  position: relative !important;
}

.tz-cb-popover {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 10000;
  background-color: var(--surface, #ffffff);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), 0 4px 12px rgba(0, 0, 0, 0.15);
  padding: 0.75rem;
  box-sizing: border-box;
  animation: tzCbFadeIn 0.15s ease-out;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  max-height: 340px;
}

@keyframes tzCbFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.tz-cb-search-wrap {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: var(--surface, #ffffff);
  margin-bottom: 0.6rem;
  padding-bottom: 0.2rem;
}

.tz-cb-search-input {
  width: 100%;
  height: 40px;
  box-sizing: border-box;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.88rem;
  background-color: var(--surface-2);
  color: var(--text);
  outline: none;
  transition: border-color var(--ease), box-shadow var(--ease);
}

.tz-cb-search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 20%, transparent);
}

.tz-cb-options {
  max-height: 250px;
  overflow-y: auto;
  padding-right: 4px;
  flex: 1;
}

/* ─── Global Stacking Context Elevation for Active Tool Popovers ─── */
.input-group:has(.dp-active),
.input-group:has(.tz-cb-active),
.tz-field-full:has(.tz-cb-active),
.calculator-grid:has(.dp-active),
.calculator-grid:has(.tz-cb-active),
.tz-grid:has(.dp-active),
.tz-grid:has(.tz-cb-active),
.unix-grid:has(.dp-active),
.unix-grid:has(.tz-cb-active),
.calculator-section:has(.dp-active),
.calculator-section:has(.tz-cb-active),
.unix-calculator-card:has(.dp-active),
.unix-calculator-card:has(.tz-cb-active),
.tool-page-card:has(.dp-active),
.tool-page-card:has(.tz-cb-active) {
  z-index: 10000 !important;
  position: relative !important;
}

.calculator-section,
.tool-page-card,
.unix-calculator-card,
.unix-sections-wrapper {
  overflow: visible !important;
}

.tz-cb-options::-webkit-scrollbar {
  width: 6px;
}
.tz-cb-options::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.tz-cb-group-header {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  padding: 0.4rem 0.5rem 0.2rem 0.5rem;
  margin-top: 0.2rem;
}

.tz-cb-item {
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: background-color var(--ease);
}

.tz-cb-item:hover,
.tz-cb-item.is-focused {
  background-color: color-mix(in srgb, var(--primary) 15%, transparent);
}

.tz-cb-item.is-selected {
  background-color: color-mix(in srgb, var(--primary) 25%, transparent);
  border-left: 3px solid var(--primary);
}

.tz-cb-item-main {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.tz-cb-item-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: monospace;
}

.tz-cb-no-results {
  padding: 1rem;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-muted);
}