:root {
  --theme-color: #f36523;
  --bg: #f3f4f6;
  --surface: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --nav: #111827;
  --nav-hover: #374151;
  --ok: #059669;
  --bad: #dc2626;
  --radius: 8px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header {
  background: var(--theme-color);
  color: white;
  padding: 20px;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

.controls {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
}

.controls label {
  margin-inline-end: 6px;
  font-size: 0.9rem;
}

.controls select {
  padding: 6px 10px;
  border-radius: 4px;
  border: none;
  font-size: 0.95rem;
}

nav {
  background: var(--nav);
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
}

nav a {
  display: block;
  padding: 15px 20px;
  color: white;
  text-decoration: none;
}

nav a:hover,
nav a.active {
  background: var(--nav-hover);
}

nav a.active {
  box-shadow: inset 0 -3px 0 var(--theme-color);
}

main {
  max-width: 960px;
  margin: 30px auto;
  padding: 0 15px 40px;
}

.card {
  background: var(--surface);
  padding: 20px;
  margin-bottom: 20px;
  border-inline-start: 6px solid var(--theme-color);
  border-radius: var(--radius);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.card h2 {
  margin-bottom: 10px;
  font-size: 1.25rem;
}

.card h3 {
  margin: 12px 0 8px;
  font-size: 1.05rem;
}

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

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.btn {
  display: inline-block;
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  background: var(--theme-color);
  color: white;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}

.btn:hover {
  filter: brightness(1.08);
}

.btn.secondary {
  background: #374151;
}

.btn.ghost {
  background: transparent;
  color: var(--theme-color);
  border: 2px solid var(--theme-color);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-again { background: #dc2626; }
.btn-hard { background: #ea580c; }
.btn-good { background: #2563eb; }
.btn-easy { background: #059669; }

.due-count {
  font-size: 2rem;
  font-weight: 700;
  color: var(--theme-color);
}

.quick-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

/* Lookup */
.search-box {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  border: 2px solid #e5e7eb;
  border-radius: 6px;
  margin-bottom: 16px;
}

.search-box:focus {
  outline: none;
  border-color: var(--theme-color);
}

.word-card .word-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.word-arabic {
  font-size: 1.75rem;
  font-weight: 700;
}

.word-pos {
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: capitalize;
}

.word-def {
  margin-top: 6px;
  font-size: 1.05rem;
}

.word-translit {
  color: var(--muted);
  font-style: italic;
  margin-bottom: 10px;
}

.word-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px 16px;
  font-size: 0.9rem;
}

.word-meta dt {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.word-meta dd {
  font-weight: 600;
}

.root-link {
  background: none;
  border: none;
  color: var(--theme-color);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  padding: 0;
}

.word-notes {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--muted);
}

.conj-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 8px;
}

.conj-tense table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.conj-tense td {
  padding: 4px 6px;
  border-bottom: 1px solid #eee;
}

.conj-tense td:first-child {
  color: var(--muted);
  width: 3rem;
}

/* Learn / flashcards */
.flashcard {
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px 20px;
  cursor: pointer;
  user-select: none;
}

.flashcard .prompt {
  font-size: 2rem;
  font-weight: 700;
}

.flashcard .answer {
  margin-top: 16px;
  font-size: 1.35rem;
}

.flashcard .hint {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

.session-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--muted);
}

.rating-hint {
  font-size: 0.75rem;
  opacity: 0.85;
  display: block;
  margin-top: 2px;
}

/* Quiz */
.quiz-setup label {
  display: block;
  margin: 10px 0 4px;
  font-size: 0.9rem;
  color: var(--muted);
}

.quiz-setup select,
.quiz-setup input[type="text"] {
  width: 100%;
  max-width: 320px;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  font-size: 1rem;
}

.quiz-options {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.quiz-option {
  padding: 14px 16px;
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  background: white;
  cursor: pointer;
  text-align: start;
  font-size: 1.05rem;
}

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

.quiz-option.correct {
  border-color: var(--ok);
  background: #ecfdf5;
}

.quiz-option.wrong {
  border-color: var(--bad);
  background: #fef2f2;
}

.quiz-feedback {
  margin-top: 12px;
  font-weight: 600;
}

.quiz-feedback.ok { color: var(--ok); }
.quiz-feedback.bad { color: var(--bad); }

.conj-prompt {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.conj-prompt .arabic {
  font-size: 1.5rem;
  font-weight: 700;
  display: block;
  margin: 8px 0;
}

/* Grammar */
.grammar-section {
  margin-bottom: 8px;
}

.grammar-section h2 {
  color: var(--theme-color);
}

.grammar-section ul {
  margin: 10px 0 0 1.25rem;
  line-height: 1.6;
}

.grammar-section p {
  line-height: 1.6;
  margin-top: 8px;
}

.grammar-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.grammar-toc a {
  color: var(--theme-color);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 4px 10px;
  border: 1px solid var(--theme-color);
  border-radius: 999px;
}

.grammar-toc a:hover {
  background: var(--theme-color);
  color: white;
}

@media (max-width: 600px) {
  header h1 {
    font-size: 1.2rem;
  }

  nav a {
    padding: 12px 14px;
    font-size: 0.9rem;
  }

  .flashcard .prompt {
    font-size: 1.5rem;
  }
}