:root {
  --bg: #f2f1ec;
  --panel: #ffffff;
  --panel-alt: #f6f4ee;
  --ink: #211f1c;
  --muted: #6b665d;
  --border: #e2ddd0;
  --accent: #c1712f;
  --accent-soft: rgba(193, 113, 47, 0.12);
  --success: #3d7a4f;
  --success-soft: rgba(61, 122, 79, 0.12);
  --danger: #a4432c;
  --danger-soft: rgba(164, 67, 44, 0.12);
  --shadow: 0 18px 40px rgba(40, 30, 15, 0.08);
}

:root[data-theme="dark"] {
  --bg: #1c1a17;
  --panel: #262320;
  --panel-alt: #2c2925;
  --ink: #f2ede4;
  --muted: #b3ab9d;
  --border: #3c3731;
  --accent: #e08c46;
  --accent-soft: rgba(224, 140, 70, 0.16);
  --success: #6bbf82;
  --success-soft: rgba(107, 191, 130, 0.14);
  --danger: #e07a5f;
  --danger-soft: rgba(224, 122, 95, 0.14);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: Georgia, "Times New Roman", serif;
  background: var(--bg);
  color: var(--ink);
  transition:
    background 0.2s ease,
    color 0.2s ease;
}

.wrap {
  width: min(880px, 100%);
  margin: 0 auto;
  padding: 22px 20px 60px;
}

nav.topnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 26px;
  flex-wrap: wrap;
  gap: 12px;
}

.site-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.95rem;
  flex-wrap: wrap;
}

.nav-links a,
.nav-links button {
  font-family: inherit;
  font-size: inherit;
  color: var(--muted);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 0;
}

.nav-links a.active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
}

.nav-links button#themeToggle {
  color: var(--accent);
  font-weight: 700;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  font-family: Arial, Helvetica, sans-serif;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1.2;
  font-weight: 400;
}

.subtitle {
  margin: 0 0 26px;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.6;
  max-width: 62ch;
}

.pillrow {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
  font-family: Arial, Helvetica, sans-serif;
}

.pill {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.88rem;
  cursor: pointer;
  font-weight: 600;
}

.pill.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.filters {
  margin-bottom: 22px;
}

.statsrow {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin: 22px 0 8px;
  font-family: Arial, Helvetica, sans-serif;
  flex-wrap: wrap;
}

.statsrow .stat-label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 700;
  margin-right: 6px;
}

.statsrow .stat-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
}

.stat-group {
  display: flex;
  gap: 22px;
}

.progress-track {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  margin-bottom: 28px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.25s ease;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 30px 32px 26px;
}

.badges {
  display: flex;
  gap: 8px;
  margin-bottom: 22px;
  font-family: Arial, Helvetica, sans-serif;
}

.badge {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--muted);
}

.badge.lang {
  color: var(--accent);
  border-color: var(--accent);
}

.method-name {
  font-family: "Courier New", Courier, monospace;
  font-size: clamp(1.8rem, 4vw, 2.3rem);
  margin: 0 0 14px;
  font-weight: 700;
}

.ask {
  font-style: italic;
  color: var(--muted);
  margin: 0 0 22px;
  font-size: 1.05rem;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.option {
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  width: 100%;
  border: 1px solid var(--border);
  background: var(--panel-alt);
  border-radius: 10px;
  padding: 14px 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  color: var(--ink);
  cursor: pointer;
}

.option:hover:not(:disabled) {
  border-color: var(--accent);
}

.option .key {
  font-style: italic;
  color: var(--accent);
  font-family: Georgia, serif;
  width: 14px;
  flex-shrink: 0;
}

.option.correct {
  border-color: var(--success);
  background: var(--success-soft);
}

.option.correct .key {
  color: var(--success);
}

.option.incorrect {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.option.incorrect .key {
  color: var(--danger);
}

.option:disabled {
  cursor: default;
}

.example-box {
  display: none;
  margin-top: 20px;
  padding: 16px 18px;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.88rem;
  color: var(--ink);
  white-space: pre-wrap;
}

.example-box.show {
  display: block;
}

.next-hint {
  text-align: center;
  margin-top: 22px;
  color: var(--muted);
  font-size: 0.85rem;
  font-family: Arial, Helvetica, sans-serif;
}

.next-hint kbd {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: inherit;
}

.next-btn {
  display: none;
  margin-top: 20px;
  border: none;
  background: var(--accent);
  color: white;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: 999px;
  cursor: pointer;
}

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

.next-btn.show {
  display: inline-block;
}

.hint-panel {
  margin-top: 18px;
}

.hint-toggle {
  width: 100%;
  text-align: left;
  border: 1px dashed var(--border);
  background: var(--panel-alt);
  color: var(--muted);
  border-radius: 10px;
  padding: 12px 16px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
}

.hint-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hint-code {
  display: none;
  margin: 10px 0 0;
  padding: 16px 18px;
  background: #2b2420;
  color: #f3e7d5;
  border-radius: 10px;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  white-space: pre-wrap;
}

.hint-code.show {
  display: block;
}

.round-done {
  text-align: center;
  padding: 40px 20px;
}

.round-done h2 {
  margin: 0 0 10px;
  font-weight: 400;
}

.round-done p {
  color: var(--muted);
  margin: 0 0 20px;
}

.round-done .pill {
  display: inline-block;
}

@media (max-width: 560px) {
  .card {
    padding: 22px 18px;
  }
  .statsrow {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}