/*
 * Brand layer: applies the Colour Law on top of the component styles.
 * Loaded last. Only neutral chrome, the action colour and data colour.
 */

body {
  background-color: var(--color-canvas);
}

/* Header: white bar, hairline, and the Spectrum across the top. */
.site-header {
  position: relative;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.site-header::before {
  display: block;
  height: 3px;
  background: var(--spectrum);
  content: '';
}

.nav-brand,
.footer-brand {
  display: inline-flex;
  gap: 0.55rem;
  align-items: center;
}

.nav-brand {
  color: var(--color-ink);
}

.nav-brand:hover {
  color: var(--color-ink);
}

.brand-mark {
  display: inline-flex;
  flex: 0 0 auto;
  gap: 2px;
  align-items: flex-end;
  height: 1.1rem;
}

.brand-mark span {
  display: block;
  width: 4px;
  border-radius: 1px;
}

.brand-mark span:nth-child(1) {
  height: 45%;
  background: var(--spectrum-1);
}

.brand-mark span:nth-child(2) {
  height: 70%;
  background: var(--spectrum-2);
}

.brand-mark span:nth-child(3) {
  height: 100%;
  background: var(--spectrum-3);
}

.brand-mark span:nth-child(4) {
  height: 80%;
  background: var(--spectrum-4);
}

.nav-link[aria-current='page'] {
  color: var(--color-ink);
  border-color: var(--color-action);
}

/* Hero: plain white band. No gradients, no tints. */
.hero {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

/* Buttons: one action colour; everything else is neutral. */
.btn {
  transition:
    background-color var(--t-fast) var(--e-out),
    border-color var(--t-fast) var(--e-out),
    color var(--t-fast) var(--e-out),
    transform var(--t-fast) var(--e-out);
}

.btn:active {
  transform: scale(0.97);
}

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

.btn-primary:hover {
  background-color: var(--color-action-strong);
  border-color: var(--color-action-strong);
  box-shadow: none;
}

.btn-secondary {
  color: var(--color-ink);
  background-color: var(--color-white);
  border-color: var(--color-gray-300);
}

.btn-secondary:hover {
  color: var(--color-ink);
  background-color: var(--color-canvas);
  border-color: var(--color-ink);
  box-shadow: none;
}

a:hover {
  color: var(--color-action-strong);
}

a:focus-visible,
.btn:focus-visible,
.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
  outline: 2px solid var(--color-action);
  outline-offset: 2px;
}

/* Counts and labels are chrome, not data: neutral. */
.badge-primary,
.badge-secondary {
  color: var(--color-gray-700);
  background-color: var(--color-sunken);
}

/* Cards: hairline borders, quiet hover, no lift. */
.tool-card,
.category-card,
.collection-card,
.tool-profile-facts,
.form-fieldset {
  border-color: var(--color-border);
  box-shadow: none;
}

.tool-card:hover,
.category-card:hover,
.collection-card:hover {
  border-color: var(--color-gray-400);
  box-shadow: var(--shadow-md);
  transform: none;
}

.category-card h3 a:hover,
.collection-card h3 a:hover,
.tool-card-title a:hover {
  color: var(--color-action);
}

.submit-rules,
.listing-note {
  background-color: var(--color-white);
}

/* Footer: the one dark band. */
.site-footer {
  background-color: var(--color-band);
}

.footer-brand {
  color: var(--color-white);
}

.footer-brand:hover {
  color: var(--color-white);
}

.site-footer a:hover {
  color: var(--color-white);
}

/* Category hues: data colour ------------------------------------------------ */

.hue-1 {
  --hue: var(--hue-1);
}
.hue-2 {
  --hue: var(--hue-2);
}
.hue-3 {
  --hue: var(--hue-3);
}
.hue-4 {
  --hue: var(--hue-4);
}
.hue-5 {
  --hue: var(--hue-5);
}
.hue-6 {
  --hue: var(--hue-6);
}
.hue-7 {
  --hue: var(--hue-7);
}
.hue-8 {
  --hue: var(--hue-8);
}
.hue-9 {
  --hue: var(--hue-9);
}
.hue-10 {
  --hue: var(--hue-10);
}
.hue-none {
  --hue: var(--color-gray-700);
}

.hue-dot {
  display: inline-block;
  flex: 0 0 auto;
  width: 0.625rem;
  height: 0.625rem;
  margin-right: 0.5rem;
  vertical-align: 0.1em;
  background-color: var(--hue);
  border-radius: 2px;
}

/* Monogram tiles ------------------------------------------------------------ */

.monogram {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.02em;
  background-color: var(--hue);
  border-radius: var(--border-radius-md);
}

.monogram-md {
  width: 2.5rem;
  height: 2.5rem;
  font-size: 0.95rem;
}

.monogram-lg {
  width: 3.75rem;
  height: 3.75rem;
  font-size: 1.35rem;
  border-radius: var(--border-radius-lg);
}

/* An approved logo sits in the monogram's frame: white tile, thin border,
   the mark inset so a square icon and a round one look equally at home. */
.tool-logo-frame {
  padding: 0.3rem;
  overflow: hidden;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
}

.tool-logo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.tool-card-identity {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  min-width: 0;
}

.tool-card-identity .tool-card-title {
  margin-bottom: 0.1rem;
}

.tool-profile-intro-row {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  margin-bottom: var(--spacing-xs);
}

.tool-profile-intro-row h1 {
  margin-bottom: 0;
}

/* Homepage ------------------------------------------------------------------- */

.eyebrow {
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-tiny);
  font-weight: 600;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md) var(--spacing-2xl);
  justify-content: center;
  margin: var(--spacing-xl) 0 0;
}

.hero-stats div {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.15rem;
  align-items: center;
}

.hero-stats dt {
  font-size: var(--font-size-tiny);
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-stats dd {
  margin: 0;
  font-family: var(--font-family-mono);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-ink);
}

.section-how {
  background-color: var(--color-white);
  border-block: 1px solid var(--color-border);
}

.how-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--spacing-lg);
  padding: 0;
  margin: 0;
  list-style: none;
}

.how-step {
  padding-top: var(--spacing-md);
  border-top: 2px solid var(--color-ink);
}

.how-step-number {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-small);
  color: var(--color-gray-500);
}

.how-step h3 {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-h5);
}

.how-step p {
  color: var(--color-gray-600);
  line-height: 1.6;
}

@media (min-width: 48rem) {
  .how-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-xl);
  }
}

.hero .eyebrow {
  max-width: none;
  margin-inline: auto;
  text-align: center;
}

/* Tools list with filters --------------------------------------------------- */

.tools-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--spacing-xl);
  align-items: start;
}

.filter-panel {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
}

.filter-details summary {
  padding: var(--spacing-sm) 0;
  font-weight: 700;
  cursor: pointer;
}

.filter-form {
  padding-top: var(--spacing-sm);
}

.filter-form .form-group {
  margin-bottom: var(--spacing-md);
}

.filter-form .form-select {
  padding: 0.55rem 0.75rem;
  font-size: var(--font-size-small);
}

.filter-checks {
  padding: 0;
  margin: 0 0 var(--spacing-md);
  border: 0;
}

.filter-checks legend {
  margin-bottom: var(--spacing-xs);
}

.filter-check {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  padding: 0.3rem 0;
  font-size: var(--font-size-small);
  cursor: pointer;
}

.filter-check input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--color-action);
}

.filter-actions {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.filter-note {
  margin-top: var(--spacing-md);
  font-size: var(--font-size-tiny);
  line-height: 1.5;
  color: var(--color-gray-600);
}

.tools-results .tool-card {
  grid-column: span 12;
}

.empty-state {
  grid-column: 1 / -1;
  padding: var(--spacing-xl);
  background-color: var(--color-white);
  border: 1px dashed var(--color-gray-300);
  border-radius: var(--border-radius-lg);
}

.empty-state p {
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-700);
}

@media (min-width: 48rem) {
  .tools-results .tool-card {
    grid-column: span 6;
  }
}

@media (min-width: 64rem) {
  .tools-layout {
    grid-template-columns: 16rem minmax(0, 1fr);
  }

  .filter-panel {
    position: sticky;
    top: var(--spacing-lg);
  }
}

@media (min-width: 80rem) {
  .tools-results .tool-card {
    grid-column: span 4;
  }
}

/* Compare ------------------------------------------------------------------- */

.compare-picker {
  max-width: 48rem;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
}

.compare-slots {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0 var(--spacing-lg);
}

.compare-toggle {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.chip-active {
  color: var(--color-white);
  background-color: var(--color-ink);
  border-color: var(--color-ink);
}

.compare-scroll {
  overflow-x: auto;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
}

.compare-table {
  width: 100%;
  min-width: 36rem;
  font-size: var(--font-size-small);
  border-collapse: collapse;
}

.compare-table th,
.compare-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-sunken);
}

.compare-table thead th,
.compare-table thead td {
  background-color: var(--color-canvas);
  border-bottom: 1px solid var(--color-border);
}

.compare-table tbody th {
  position: sticky;
  left: 0;
  z-index: 1;
  width: 11rem;
  font-weight: 600;
  color: var(--color-gray-700);
  background-color: var(--color-white);
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: 0;
}

.compare-tool {
  display: inline-flex;
  gap: 0.6rem;
  align-items: center;
  font-size: var(--font-size-body);
  font-weight: 700;
  color: var(--color-ink);
  text-decoration: none;
}

.compare-tool:hover span {
  color: var(--color-action);
  text-decoration: underline;
}

.row-flag {
  display: block;
  margin-top: 0.2rem;
  font-family: var(--font-family-mono);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-action);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.row-flag-partial {
  color: var(--color-gray-500);
}

@media (min-width: 48rem) {
  .compare-slots {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.compare-empty {
  padding: 1.5rem;
  border: 1px dashed var(--color-border, #e2e2df);
  border-radius: 0.5rem;
  color: #3a3a37;
}