:root {
  color-scheme: light dark;

  --bg: #f4f5f7;
  --bg-elevated: #ffffff;
  --border: #e2e4ea;
  --text: #1a1d29;
  --text-muted: #676d7e;
  --accent: #4f5fe0;
  --accent-hover: #3f4dc4;
  --accent-contrast: #ffffff;
  --accent-tint: #eceeff;
  --success: #1a9166;
  --success-tint: #e4f6ee;
  --danger: #d9433a;
  --danger-tint: #fbeae8;

  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 7px;
  --shadow: 0 1px 2px rgba(20, 21, 33, 0.04), 0 8px 24px -12px rgba(20, 21, 33, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14151c;
    --bg-elevated: #1b1d27;
    --border: #2b2e3a;
    --text: #eceef4;
    --text-muted: #8d92a6;
    --accent: #7c8bff;
    --accent-hover: #99a5ff;
    --accent-contrast: #14151c;
    --accent-tint: #262a48;
    --success: #4fcf9c;
    --success-tint: #17362a;
    --danger: #f2766c;
    --danger-tint: #3a201e;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 12px 28px -14px rgba(0, 0, 0, 0.55);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--accent-contrast);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: -0.02em;
}

.brand-name {
  font-weight: 650;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.topnav-user {
  color: var(--text-muted);
  font-size: 0.9rem;
}

main {
  flex: 1;
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
  padding: 2.25rem 1.25rem 3rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem;
  text-align: center;
}

.site-footer a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}

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

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
}

h1 {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
}

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

.eyebrow {
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 0.6rem;
}

/* Dashboard tile menu */

.menu-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

.menu-list a {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text);
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.menu-list a:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.menu-icon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--accent-tint);
  color: var(--accent);
}

.menu-text {
  flex: 1;
  min-width: 0;
}

.menu-title {
  font-weight: 600;
  display: block;
}

.menu-desc {
  color: var(--text-muted);
  font-size: 0.87rem;
}

.menu-chevron {
  flex: none;
  color: var(--text-muted);
}

/* Prompts */

.prompt-word {
  font-size: 1.65rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text);
  text-align: center;
  margin: 1.5rem 0;
}

.answer {
  color: var(--success);
  background: var(--success-tint);
  border-radius: var(--radius-md);
  padding: 0.7rem 1rem;
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0.9rem 0;
}

.example {
  color: var(--text-muted);
  text-align: center;
  font-size: 0.92rem;
}

.correct {
  color: var(--success);
  font-weight: 650;
}

.incorrect {
  color: var(--danger);
  font-weight: 650;
}

.center {
  text-align: center;
}

/* Forms */

label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.field {
  margin-bottom: 1.1rem;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]:focus,
input[type="password"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

/* Buttons */

button,
.btn {
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 550;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: border-color 0.15s ease, background-color 0.15s ease, transform 0.05s ease;
}

button:hover,
.btn:hover {
  border-color: var(--accent);
}

button:active,
.btn:active {
  transform: translateY(1px);
}

button:focus-visible,
.btn:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button.primary,
.btn.primary {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
}

button.primary:hover,
.btn.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

button.ghost,
.btn.ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
}

button.ghost:hover,
.btn.ghost:hover {
  color: var(--text);
  border-color: var(--border);
}

.btn-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1.25rem;
}

.inline {
  display: inline;
}

.error {
  color: var(--danger);
  background: var(--danger-tint);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.9rem;
  margin-bottom: 1.1rem;
  font-size: 0.9rem;
}

/* Stats */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

@media (min-width: 480px) {
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.stat-tile {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  background: var(--bg);
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 0.3rem;
}

.stat-value {
  font-size: 1.3rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}