:root {
  --bg: #f6f3ec;
  --surface: #ffffff;
  --text: #2f2c27;
  --muted: #7d7667;
  --line: #e7e1d5;
  --accent: #3f6f80;
  --visited-color: #1d4f91;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* --- Header --------------------------------------------------------------- */

.page-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(246, 243, 236, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px 6px 6px;
  border-radius: 999px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
}

.back-link:hover {
  background: #ebe6db;
}

.page-logo {
  border-radius: 9px;
}

/* --- Page ----------------------------------------------------------------- */

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

h1 {
  margin: 0 0 20px;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 24px;
}

.summary-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--line);
}

.summary-number {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--visited-color);
  font-variant-numeric: tabular-nums;
}

.summary-label {
  font-size: 13px;
  color: var(--muted);
}

/* --- Sort ----------------------------------------------------------------- */

.sort {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}

.sort-label {
  margin-right: 4px;
  font-size: 13px;
  color: var(--muted);
}

.sort button {
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

.sort button:hover {
  border-color: #cfc8b9;
}

.sort button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.sort button:focus-visible,
.back-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --- List ----------------------------------------------------------------- */

.group + .group {
  margin-top: 24px;
}

.group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.group-count {
  padding: 1px 7px;
  border-radius: 999px;
  background: #ebe6db;
  font-size: 12px;
  letter-spacing: 0;
}

.country-list {
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.country {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  border-left: 4px solid var(--visited-color);
}

.country + .country {
  border-top: 1px solid var(--line);
}

.country-flag {
  width: 26px;
  font-size: 22px;
  line-height: 1;
  text-align: center;
}

.country-main {
  display: flex;
  flex: 1;
  min-width: 0;
  flex-direction: column;
  gap: 1px;
}

.country-name {
  font-size: 16px;
  font-weight: 600;
}

.country-detail {
  font-size: 13px;
  color: var(--muted);
}

.country-continent {
  flex: none;
  font-size: 13px;
  color: var(--muted);
}

.load-error {
  color: #a33;
}

@media (max-width: 420px) {
  .summary-number {
    font-size: 24px;
  }

  .summary-stat {
    padding: 12px;
  }

  .country-continent {
    display: none;
  }
}