:root {
  --color-bg: #ffffff;
  --color-surface: #f6f7f9;
  --color-text: #1a1d21;
  --color-text-muted: #5b6270;
  --color-border: #e3e5e8;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-danger: #dc2626;
  --color-warning-bg: #fef3c7;
  --color-warning-border: #fcd34d;
  --color-warning-text: #92400e;

  /* Fixed brand-navy chrome (top bar / footer) - stays constant across light/dark theme */
  --color-ink: #0b1220;
  --color-ink-elevated: #131c30;
  --color-ink-text: #eef1f8;
  --color-ink-text-muted: #94a3b8;
  --color-ink-border: rgba(255, 255, 255, 0.08);

  --gradient-hero: linear-gradient(180deg, #eaf2ff 0%, #ffffff 100%);

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 28px rgba(15, 23, 42, 0.08);

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;

  --radius: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --max-width: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #14161a;
    --color-surface: #1c1f24;
    --color-text: #f0f1f3;
    --color-text-muted: #9aa1ad;
    --color-border: #2a2e35;
    --color-primary: #5b8def;
    --color-primary-hover: #7ba2f2;
    --color-warning-bg: #422006;
    --color-warning-border: #78350f;
    --color-warning-text: #fbbf24;
    --gradient-hero: linear-gradient(180deg, #182338 0%, #14161a 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.35);
  }
}

:root[data-theme="dark"] {
  --color-bg: #14161a;
  --color-surface: #1c1f24;
  --color-text: #f0f1f3;
  --color-text-muted: #9aa1ad;
  --color-border: #2a2e35;
  --color-primary: #5b8def;
  --color-primary-hover: #7ba2f2;
  --color-warning-bg: #422006;
  --color-warning-border: #78350f;
  --color-warning-text: #fbbf24;
  --gradient-hero: linear-gradient(180deg, #182338 0%, #14161a 100%);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

/* Component display rules (e.g. .tool-form-row { display: flex }) would otherwise override the hidden attribute. */
[hidden] {
  display: none !important;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.5;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-hover);
}

.site-topbar {
  background: var(--color-ink);
  color: var(--color-ink-text-muted);
  font-size: 0.8125rem;
}

.site-topbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2) var(--space-4);
  text-align: center;
}

.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
}

.site-brand-logo {
  display: block;
  width: auto;
  height: 44px;
}

.site-brand-mark {
  display: flex;
  flex-shrink: 0;
  color: var(--color-primary);
}

.site-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-brand-name {
  font-weight: 700;
  font-size: 1.125rem;
}

.site-brand-tagline {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
}

.nav-links > li > a,
.nav-dropdown-toggle {
  color: var(--color-text-muted);
  font-weight: 500;
}

.nav-links > li > a:hover,
.nav-dropdown:hover .nav-dropdown-toggle,
.nav-dropdown.is-open .nav-dropdown-toggle {
  color: var(--color-primary);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  cursor: pointer;
}

.nav-dropdown-toggle::after {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-top: -0.2rem;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 20;
  min-width: 22rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: var(--space-3);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu {
  display: block;
}

.nav-mega-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-mega-grid a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
}

.nav-mega-grid a:hover {
  background: var(--color-surface);
  color: var(--color-primary);
}

.nav-mega-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 8px;
  color: #fff;
  flex-shrink: 0;
}

.nav-mega-icon svg {
  width: 1rem;
  height: 1rem;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  cursor: pointer;
  position: relative;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
}

.nav-toggle span {
  top: 50%;
  transform: translateY(-50%);
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.site-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.icon-button:hover {
  color: var(--color-primary);
}

.icon-button svg {
  width: 1.125rem;
  height: 1.125rem;
}

.theme-toggle-icon-dark {
  display: none;
}

:root[data-theme="dark"] .theme-toggle-icon-light {
  display: none;
}

:root[data-theme="dark"] .theme-toggle-icon-dark {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle-icon-light {
    display: none;
  }

  :root:not([data-theme="light"]) .theme-toggle-icon-dark {
    display: block;
  }
}

.site-main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-4);
}

.site-footer {
  background: var(--color-ink);
  color: var(--color-ink-text-muted);
}

.site-footer-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-4);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-4);
}

.site-footer-brand .site-brand {
  color: var(--color-ink-text);
}

.site-footer-brand .site-brand-mark {
  color: var(--color-primary);
}

.site-footer-brand p {
  color: var(--color-ink-text-muted);
  font-size: 0.875rem;
  max-width: 32rem;
  margin-bottom: 0;
}

.site-footer-col h3 {
  color: var(--color-ink-text);
  font-size: 0.9375rem;
  margin: 0 0 var(--space-2);
}

.site-footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.site-footer-col .site-footer-categories {
  display: block;
  columns: 2;
  column-gap: var(--space-4);
}

.site-footer-categories li {
  margin-bottom: var(--space-1);
  break-inside: avoid;
}

.site-footer-col a {
  color: var(--color-ink-text-muted);
  font-size: 0.875rem;
}

.site-footer-col a:hover {
  color: #fff;
}

.site-footer-bottom {
  border-top: 1px solid var(--color-ink-border);
  color: var(--color-ink-text-muted);
  text-align: center;
  padding: var(--space-3);
  font-size: 0.8125rem;
}

.text-danger {
  color: var(--color-danger);
}

.text-center {
  text-align: center;
}

/* Tool page */

.tool-page {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  max-width: 640px;
  margin: 0 auto;
}

.tool-header h1 {
  margin-bottom: var(--space-1);
  display: inline-block;
}

.tool-experimental-badge {
  display: inline-block;
  margin-left: var(--space-2);
  padding: 0.125rem var(--space-2);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-warning-text);
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius);
  vertical-align: middle;
}

.tool-experimental-notice {
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  color: var(--color-warning-text);
  font-size: 0.9rem;
}

.tool-description {
  color: var(--color-text-muted);
}

.tool-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.tool-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.tool-form-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.tool-form-row--inline {
  flex-direction: row;
  align-items: center;
  gap: var(--space-2);
}

.tool-form-row label {
  font-size: 0.875rem;
  font-weight: 600;
}

.tool-form-row input,
.tool-form-row select,
.tool-form-row textarea {
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2);
}

.tool-form-row input[type="color"] {
  padding: var(--space-1);
  height: 2.5rem;
  width: 4rem;
}

.searchable-select {
  position: relative;
}

.searchable-select-input {
  width: 100%;
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2);
}

.searchable-select-list {
  position: absolute;
  top: calc(100% + var(--space-1));
  left: 0;
  right: 0;
  z-index: 10;
  max-height: 14rem;
  overflow-y: auto;
  margin: 0;
  padding: var(--space-1);
  list-style: none;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.searchable-select-option {
  padding: var(--space-2);
  border-radius: var(--radius);
  cursor: pointer;
}

.searchable-select-option.is-highlighted {
  background: var(--color-surface);
  color: var(--color-primary);
}

.btn-primary {
  align-self: flex-start;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-4);
  cursor: pointer;
}

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

.tool-output {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

.tool-output-image {
  max-width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.tool-output-text {
  width: 100%;
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin: 0;
}

.tool-output-download {
  font-weight: 600;
}

.tool-output-html {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  overflow-x: auto;
}

.tool-output-html :first-child {
  margin-top: 0;
}

.tool-output-html :last-child {
  margin-bottom: 0;
}

.tool-output-html table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-3) 0;
}

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

.tool-output-html th {
  background: var(--color-surface);
  font-weight: 600;
}

.tool-muted {
  color: var(--color-text-muted);
}

.tool-faq dt {
  font-weight: 600;
  margin-top: var(--space-3);
}

.tool-faq dd {
  margin: var(--space-1) 0 0;
  color: var(--color-text-muted);
}

/* Dice Roller */

.dice-tray {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  width: 100%;
}

.dice-die {
  width: 4rem;
  height: 4rem;
  flex-shrink: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  align-items: center;
  justify-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.dice-die.is-rolling {
  animation: dice-shake 0.3s ease-in-out infinite;
}

@keyframes dice-shake {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-8deg); }
  75% { transform: rotate(8deg); }
}

.dice-pip {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--color-text);
  opacity: 0;
}

.dice-pip.is-active {
  opacity: 1;
}

.dice-total {
  width: 100%;
  text-align: center;
  font-weight: 700;
  font-size: 1.125rem;
  margin: var(--space-3) 0 0;
}

/* Coin Flip */

.coin-stage {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: var(--space-3) 0;
  perspective: 800px;
}

.coin {
  position: relative;
  width: 8rem;
  height: 8rem;
  transform-style: preserve-3d;
  transition: transform 0.9s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.coin-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 2.25rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(145deg, #f4c430, #b8860b);
  border: 4px solid #8a6d1f;
  backface-visibility: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.coin-face--back {
  transform: rotateY(180deg);
}

.coin-result {
  width: 100%;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin: var(--space-3) 0 0;
}

/* Name Wheel Spin */

.wheel-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  width: 100%;
  padding-top: var(--space-3);
}

.wheel-spinner {
  width: 320px;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  transform-origin: 50% 50%;
  transition: transform 3.6s cubic-bezier(0.17, 0.67, 0.24, 1);
}

.wheel-canvas {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 4px solid var(--color-surface);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.wheel-pointer {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 14px solid transparent;
  border-right: 14px solid transparent;
  border-top: 22px solid var(--color-primary);
  z-index: 2;
  filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.25));
}

.wheel-result {
  width: 100%;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin: var(--space-3) 0 0;
}

/* Open Graph Preview */

.og-preview-card {
  display: block;
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-bg);
}

.og-preview-image {
  width: 100%;
  max-height: 240px;
  object-fit: cover;
  display: block;
  background: var(--color-surface);
}

.og-preview-body {
  padding: var(--space-3);
}

.og-preview-site {
  margin: 0 0 var(--space-1);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.og-preview-title {
  margin: 0 0 var(--space-1);
  font-weight: 700;
}

.og-preview-description {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* Countdown Timer */

.countdown-label {
  width: 100%;
  font-weight: 600;
  margin: 0;
}

.countdown-display {
  font-size: 1.5rem;
  text-align: center;
  letter-spacing: 0.02em;
}

/* World Clock */

.world-clock-controls {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.world-clock-combo {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.world-clock-add-input {
  width: 100%;
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2);
}

.world-clock-add-input:disabled {
  color: var(--color-text-muted);
  cursor: not-allowed;
}

.world-clock-add-list {
  position: absolute;
  top: calc(100% + var(--space-1));
  left: 0;
  right: 0;
  z-index: 10;
  max-height: 14rem;
  overflow-y: auto;
  margin: 0;
  padding: var(--space-1);
  list-style: none;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.world-clock-add-option {
  padding: var(--space-2);
  border-radius: var(--radius);
  cursor: pointer;
}

.world-clock-add-option.is-highlighted {
  background: var(--color-surface);
  color: var(--color-primary);
}

.world-clock-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-3);
}

.world-clock-cell {
  position: relative;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  text-align: center;
}

.world-clock-remove {
  position: absolute;
  top: var(--space-1);
  right: var(--space-1);
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  font-size: 1rem;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
}

.world-clock-remove:hover {
  background: var(--color-surface);
  color: var(--color-danger);
}

.world-clock-city {
  margin: 0 0 var(--space-1);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.world-clock-time {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Sudoku */

.sudoku {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.sudoku-status {
  width: 100%;
  max-width: 480px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.sudoku-mistakes {
  margin: 0;
  font-weight: 600;
}

.sudoku-message {
  margin: 0;
  font-weight: 600;
}

.sudoku-message.is-win {
  color: var(--color-primary);
}

.sudoku-board {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1;
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius);
  overflow: hidden;
}

.sudoku-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  font: inherit;
  font-size: clamp(0.875rem, 3vw, 1.25rem);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  cursor: pointer;
  padding: 0;
}

.sudoku-box-right {
  border-right-width: 2px;
  border-right-color: var(--color-text-muted);
}

.sudoku-box-bottom {
  border-bottom-width: 2px;
  border-bottom-color: var(--color-text-muted);
}

.sudoku-cell.is-given {
  background: var(--color-surface);
  font-weight: 700;
  cursor: default;
}

.sudoku-cell.is-peer:not(.is-given) {
  background: var(--color-surface);
}

.sudoku-cell.is-same-value:not(.is-selected) {
  color: var(--color-primary);
  font-weight: 700;
}

.sudoku-cell.is-selected {
  background: var(--color-primary);
  color: #fff;
}

.sudoku-cell.is-error {
  color: var(--color-danger);
}

.sudoku-keypad {
  width: 100%;
  max-width: 480px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2);
}

.sudoku-key {
  font: inherit;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2);
  cursor: pointer;
}

.sudoku-key:hover:not(:disabled) {
  background: var(--color-surface);
}

.sudoku-key:disabled {
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.5;
}

.sudoku-key-erase {
  font-size: 0.875rem;
}

.sudoku-modal {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  border-radius: var(--radius);
}

.sudoku-modal-card {
  max-width: 320px;
  text-align: center;
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.sudoku-modal-card h3 {
  margin-top: 0;
}

.sudoku-modal-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

/* Utility */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Ad slots */

.ad-slot {
  width: 100%;
  min-height: 90px;
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* Home page */

.hero {
  max-width: 760px;
  margin: 0 auto var(--space-5);
  padding: var(--space-5) var(--space-4) var(--space-4);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  background: var(--gradient-hero);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.hero h1 {
  margin: 0;
  font-size: 2.25rem;
  line-height: 1.2;
}

.hero-accent {
  display: block;
  color: var(--color-primary);
}

.hero-tagline {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  margin: 0;
  max-width: 620px;
}

.tool-search {
  position: relative;
  width: 100%;
  max-width: 520px;
}

.tool-search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.tool-search-icon {
  position: absolute;
  left: var(--space-3);
  width: 1.125rem;
  height: 1.125rem;
  color: var(--color-text-muted);
  pointer-events: none;
}

.tool-search-input {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-3) var(--space-3) 2.75rem;
  box-shadow: var(--shadow-sm);
}

.tool-search-results {
  position: absolute;
  top: calc(100% + var(--space-1));
  left: 0;
  right: 0;
  z-index: 10;
  max-height: 20rem;
  overflow-y: auto;
  margin: 0;
  padding: var(--space-1);
  list-style: none;
  text-align: left;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.tool-search-result a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius);
  color: var(--color-text);
}

.tool-search-result.is-highlighted a,
.tool-search-result a:hover {
  background: var(--color-surface);
  color: var(--color-primary);
}

.tool-search-result-name {
  font-weight: 600;
}

.tool-search-result-category {
  flex-shrink: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.hero-trending {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: 0.875rem;
}

.hero-trending-label {
  font-weight: 600;
  color: var(--color-text-muted);
}

.hero-trending-pill {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.8125rem;
}

.hero-trending-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.home-section {
  margin-top: var(--space-5);
  scroll-margin-top: var(--space-4);
}

.home-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.home-section-header h2 {
  margin: 0;
}

.home-section-link {
  font-weight: 600;
  font-size: 0.875rem;
  white-space: nowrap;
}

.category-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-3);
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow-sm);
  color: var(--color-text);
}

.category-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  color: var(--color-text);
}

.category-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius);
  color: #fff;
  margin-bottom: var(--space-1);
}

.category-card-icon svg {
  width: 1.375rem;
  height: 1.375rem;
}

.category-card-name {
  font-weight: 700;
}

.category-card-description {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.category-card-count {
  margin-top: var(--space-1);
  font-size: 0.8125rem;
  font-weight: 600;
}

.home-features {
  background: var(--gradient-hero);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.home-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

.home-feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.home-feature svg {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-primary);
}

.home-feature h3 {
  margin: 0 0 0.25rem;
  font-size: 0.9375rem;
}

.home-feature p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.popular-tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-2);
}

.popular-tool {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text);
}

.popular-tool:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.popular-tool-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  color: #fff;
  flex-shrink: 0;
}

.popular-tool-icon svg {
  width: 1rem;
  height: 1rem;
}

.popular-tool-name {
  flex: 1;
  font-weight: 600;
  font-size: 0.9375rem;
}

.popular-tool-chevron {
  width: 1rem;
  height: 1rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.home-cta {
  margin-top: var(--space-5);
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.home-cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.home-cta h2 {
  margin: 0 0 0.25rem;
  color: #fff;
  font-size: 1.25rem;
}

.home-cta p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
}

.btn-cta {
  flex-shrink: 0;
  font-weight: 600;
  color: var(--color-primary);
  background: #fff;
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  white-space: nowrap;
}

.btn-cta:hover {
  color: var(--color-primary);
  background: #f1f5fb;
}

/* Category page */

.category-page {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.category-header {
  text-align: center;
}

.category-intro {
  color: var(--color-text-muted);
}

.category-tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-3);
}

.category-tool-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

.category-tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.category-tool-card-name {
  font-weight: 600;
}

.category-tool-card-description {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Breadcrumbs */

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: var(--space-1);
  opacity: 0.6;
}

.breadcrumbs a {
  color: var(--color-text-muted);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

/* Tool page content sections */

.tool-content h2 {
  margin-bottom: var(--space-2);
}

.tool-content p {
  color: var(--color-text-muted);
}

.tool-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin: 0;
  padding-left: 1.25rem;
  color: var(--color-text-muted);
}

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

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

.tool-link-list a {
  display: inline-block;
  padding: 0.25rem var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.875rem;
}

.tool-link-list a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Responsive */

@media (max-width: 860px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--space-2) var(--space-4);
    z-index: 30;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links > li {
    width: 100%;
  }

  .nav-links > li > a,
  .nav-dropdown-toggle {
    display: block;
    padding: var(--space-2) 0;
  }

  .nav-dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    padding: 0 0 var(--space-2);
    min-width: 0;
  }

  .nav-mega-grid {
    grid-template-columns: 1fr;
  }

  .site-nav {
    position: relative;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: block;
  }

  .site-brand-tagline {
    display: none;
  }

  .site-brand-logo {
    height: 36px;
  }

  .site-nav-actions {
    margin-left: 0;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .site-footer-main {
    grid-template-columns: 1fr;
  }

  .home-cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}