:root {
  --text: #1a1a1a;
  --muted: #666;
  --border: #ddd;
  --header-bg: #c2c2c2;
  --footer-bg: #f8f9fa;
  --primary: #007bff;
  --primary-hover: #0056b3;
  --referral: #28a745;
  --referral-hover: #1e7e34;
  --secondary: #6c757d;
  --chip: #000;
  --chip-off: #6c757d;
  --surface: #fff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8e8e8;
    --muted: #a0a0a0;
    --border: #3a3a3a;
    --header-bg: #2b2b2b;
    --footer-bg: #1c1c1c;
    --chip: #3a3a3a;
    --chip-off: #1f1f1f;
    --surface: #121212;
    --primary: #1f6feb;
    --primary-hover: #388bfd;
    --referral: #238636;
    --referral-hover: #2ea043;
    --secondary: #3d444d;
  }
  .filter-button[aria-pressed="false"] {
    color: var(--muted);
  }
}

:root {
  color-scheme: light dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: Arial, sans-serif;
  color: var(--text);
  background: var(--surface);
  text-align: center;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

/* ---------- header / footer ---------- */

.site-header-bar {
  background: var(--header-bg);
  padding: 0.5rem;
  margin-bottom: 0.75rem;
}

.site-header-bar a {
  text-decoration: none;
}

.brand {
  margin: 0.67em 0;
  font-size: 2em;
  font-weight: bold;
}

main {
  flex: 1;
}

.footer {
  background: var(--footer-bg);
  padding: 20px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-content a {
  text-decoration: none;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-info {
  display: flex;
  gap: 10px;
}

/* ---------- list view ---------- */

.filter-info {
  font-size: 1rem;
  margin: 10px;
}

.disclosure {
  margin: 0 16px;
  font-size: 0.85rem;
  color: var(--muted);
}

.disclosure a,
.prose a {
  color: var(--primary);
}

.prose {
  line-height: 1.55;
}

.prose h2 {
  margin: 24px 0 8px;
  font-size: 1.2rem;
}

.intro {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 16px;
  line-height: 1.5;
}

.intro p:first-child {
  margin-top: 0;
}

.updated {
  font-size: 0.85rem;
  color: var(--muted);
}

/* Label/value facts: inline "Label: value" lines in cards, a two-column table on detail pages */
.facts dt {
  display: inline;
  font-weight: bold;
}

.facts dt::after {
  content: ": ";
}

.facts dd {
  display: inline;
  margin: 0;
}

.facts dd::after {
  content: "";
  display: block;
  margin-bottom: 1em;
}

.site-detail .facts {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 10px 20px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.site-detail .facts dt::after,
.site-detail .facts dd::after {
  content: none;
}

.breadcrumbs {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: left;
  font-size: 0.9rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li + li::before {
  content: "›";
  margin-right: 6px;
  color: var(--muted);
}

.breadcrumbs a,
.similar a,
.site-detail p a:not(.button) {
  color: var(--primary);
}

.similar {
  max-width: 800px;
  margin: 0 auto 20px;
  padding: 0 20px;
  text-align: left;
}

.similar h2 {
  font-size: 1.2rem;
}

.similar ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.similar li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
}

.similar li a:hover {
  border-color: var(--primary);
}

.similar-logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 20%;
}

.similar-logo.logo-fallback {
  font-size: 1rem;
}

.layout {
  display: flex;
  gap: 20px;
  max-width: 1550px;
  margin: 0 auto;
  padding: 20px;
}

.filter-bar {
  display: flex;
  flex-direction: column;
  flex: 0 0 150px;
}

.filter-button,
.sort-dropdown {
  margin: 5px;
  padding: 10px 20px;
  border: none;
  border-radius: 20px;
  font-size: 12px;
  color: #fff;
  background: var(--chip-off);
  cursor: pointer;
}

.filter-button[aria-pressed="true"],
.sort-dropdown {
  background: var(--chip);
}

.site-list {
  flex: 1;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 425px), 1fr));
}

.site-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.info-icon {
  position: absolute;
  top: 20px;
  right: 20px;
  color: var(--muted);
}

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

.site-header,
.site-detail-header {
  display: flex;
  align-items: center;
  gap: 20px;
  text-align: left;
}

.site-logo,
.site-detail-logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 20%;
}

.site-detail-logo {
  width: 100px;
  height: 100px;
}

.logo-fallback {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: bold;
  color: #fff;
  background: var(--secondary);
}

.site-title {
  margin: 0 0 4px;
  font-size: 1.5rem;
}

.site-title a {
  text-decoration: none;
}

.site-subtitle,
.site-detail-subtitle {
  margin: 0;
  font-weight: bold;
  color: var(--muted);
}

.site-info {
  margin: 7.5px;
}

/* ---------- buttons ---------- */

.site-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
}

.button {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 20px;
  font-size: 16px;
  color: #fff;
  text-decoration: none;
  background: var(--primary);
}

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

.button.referral {
  background: var(--referral);
}

.button.referral:hover {
  background: var(--referral-hover);
}

.button.secondary {
  background: var(--secondary);
}

/* ---------- detail view ---------- */

.site-detail {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  text-align: left;
}

.site-detail-title {
  margin: 0 0 4px;
  font-size: 2rem;
}

.site-detail .site-buttons {
  justify-content: flex-start;
}

/* ---------- small screens ---------- */

@media (max-width: 768px) {
  .site-header-bar {
    margin-bottom: 0;
  }

  .brand {
    margin: 0.25rem 0;
    font-size: 1.4rem;
  }

  .intro {
    margin-top: 12px;
    font-size: 0.95rem;
  }

  .filter-info {
    font-size: 0.9rem;
    margin: 10px 16px 0;
  }

  .layout {
    flex-direction: column;
    gap: 12px;
    padding: 0 16px 16px;
  }

  /* Filters stay reachable while scrolling the list */
  .filter-bar {
    position: sticky;
    top: 0;
    z-index: 1;
    flex: none;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    margin: 0 -16px;
    padding: 10px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
  }

  .filter-button,
  .sort-dropdown {
    margin: 0;
    min-height: 40px;
    padding: 8px 14px;
    font-size: 14px;
  }

  .sort-dropdown {
    margin-left: auto;
    /* 16px keeps iOS Safari from zooming in when the menu is tapped */
    font-size: 16px;
  }

  .site-list {
    gap: 12px;
  }

  .site-item {
    padding: 16px;
  }

  .info-icon {
    top: 12px;
    right: 12px;
    padding: 4px;
  }

  .site-header {
    align-self: stretch;
    gap: 14px;
    padding-right: 28px;
  }

  .site-logo {
    width: 56px;
    height: 56px;
  }

  .site-detail-logo {
    width: 72px;
    height: 72px;
  }

  .logo-fallback {
    font-size: 1.75rem;
  }

  .site-title {
    font-size: 1.25rem;
  }

  .site-detail-title {
    font-size: 1.6rem;
  }

  .site-info {
    margin: 12px 0 0;
    text-align: left;
    font-size: 0.95rem;
    line-height: 1.45;
  }

  .site-info p {
    margin: 0 0 8px;
  }

  .site-info .facts dd::after {
    margin-bottom: 8px;
  }

  /* Full-width, thumb-sized buttons */
  .site-buttons,
  .site-detail .site-buttons {
    align-self: stretch;
    justify-content: stretch;
  }

  .button {
    flex: 1 1 0;
    min-height: 44px;
    padding: 12px 10px;
    text-align: center;
    white-space: nowrap;
  }

  .site-detail {
    padding: 16px;
  }

  .footer {
    padding: 16px;
  }

  .footer-content {
    flex-direction: column;
    gap: 4px;
  }

  .footer-content p {
    margin: 4px 0;
  }
}

/* Very narrow phones: stack the action buttons */
@media (max-width: 360px) {
  .site-buttons {
    flex-direction: column;
  }
}

/* Avoid sticky hover colours after a tap on touch screens */
@media (hover: none) {
  .button:hover {
    background: var(--primary);
  }

  .button.referral:hover {
    background: var(--referral);
  }

  .button.secondary:hover {
    background: var(--secondary);
  }

  .info-icon:hover {
    color: var(--muted);
  }
}

button,
select,
a {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}