/* dark.css - Dark Theme cho LearnQuest AI */

/* Reset + font chung */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

/* --------- NỀN & LAYOUT CHUNG --------- */

body.dark-theme {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  color: #e0e0e0;
  min-height: 100vh;
  padding: 20px;
}

body.dark-theme .container {
  max-width: 900px;
  margin: auto;
  background: #16213e;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

body.dark-theme header {
  background: #0f3460;
  color: #ffffff;
  padding: 20px 30px;
  position: relative;
  text-align: left;
}

body.dark-theme h1 {
  font-size: 24px;
  margin-bottom: 8px;
}

body.dark-theme .subtitle {
  font-size: 14px;
  opacity: 0.9;
  margin-left: 5px;
}

/* --------- USER INFO + BUTTONS --------- */

body.dark-theme .user-info {
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 13px;
  background: #ffffff22;
  padding: 5px 10px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

body.dark-theme .logout-btn,
body.dark-theme .profile-btn {
  background: #e94560;
  color: white;
  border: none;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  cursor: pointer;
  margin-left: 5px;
}

/* XP / Coin / Huy hiệu */

body.dark-theme .stats {
  display: flex;
  gap: 15px;
  font-size: 13px;
}

body.dark-theme .stat-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* --------- CÁC KHỐI CHÍNH --------- */

body.dark-theme .auth,
body.dark-theme .quiz,
body.dark-theme .game-board,
body.dark-theme .profile {
  padding: 30px;
  color: #e0e0e0;
}

body.dark-theme .auth {
  text-align: center;
}

/* --------- INPUT & BUTTON CHUNG --------- */

body.dark-theme input {
  width: 100%;
  padding: 12px;
  margin: 10px 0;
  border-radius: 10px;
  border: 1px solid #444;
  background: #1e2a44;
  color: #fff;
  transition: 0.3s;
}

body.dark-theme input:focus {
  border-color: #e94560;
  outline: none;
}

body.dark-theme button.main-btn {
  background: #e94560;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 50px;
  margin: 5px;
  cursor: pointer;
  font-weight: bold;
  transition: 0.3s;
  position: relative;
  overflow: hidden;
}

body.dark-theme button.main-btn:disabled {
  background: #555;
  cursor: not-allowed;
}

body.dark-theme button.main-btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid #fff;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  left: 50%;
  top: 50%;
  margin: -8px 0 0 -8px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --------- ALERT / QUESTION / OPTION --------- */

body.dark-theme .alert {
  background: #440000;
  color: #ff6b6b;
  padding: 12px;
  border-radius: 10px;
  margin: 15px 0;
  text-align: center;
  font-weight: bold;
  display: none;
}

body.dark-theme .question {
  margin-bottom: 25px;
  padding: 20px;
  background: #1e2a44;
  border-radius: 15px;
  border-left: 5px solid #e94560;
}

body.dark-theme .options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}

body.dark-theme .option {
  padding: 12px;
  background: #16213e;
  border: 2px solid #333;
  border-radius: 12px;
  cursor: pointer;
  transition: 0.3s;
  color: #e0e0e0;
}

body.dark-theme .option:hover {
  border-color: #e94560;
  background: #1e2a44;
}

body.dark-theme .option.selected {
  background: #e94560;
  color: white;
  border-color: #e94560;
}

body.dark-theme .other-input {
  margin-top: 10px;
  display: none;
}

body.dark-theme .other-input input {
  width: 100%;
  padding: 10px;
  border: 2px solid #444;
  border-radius: 10px;
  background: #1e2a44;
  color: #fff;
}

body.dark-theme .hidden {
  display: none !important;
}

/* --------- GAME GRID / CARD --------- */

body.dark-theme .game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

body.dark-theme .game-card {
  background: #1e2a44;
  border-radius: 15px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: 0.3s;
  position: relative;
}

body.dark-theme .game-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

body.dark-theme .game-icon {
  font-size: 40px;
  margin-bottom: 10px;
  color: #e94560;
}

body.dark-theme .game-title {
  font-weight: bold;
  font-size: 18px;
  margin-bottom: 5px;
}

body.dark-theme .game-level {
  font-size: 14px;
  color: #e94560;
}

body.dark-theme .recommended {
  border: 3px solid #e94560;
  animation: pulse-dark 2s infinite;
}

@keyframes pulse-dark {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(233, 69, 96, 0.7);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(233, 69, 96, 0);
  }
}

body.dark-theme .badge {
  position: absolute;
  top: -10px;
  right: -10px;
  background: #e94560;
  color: white;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 12px;
}

/* --------- HỒ SƠ / TRAIT --------- */

body.dark-theme .profile-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

body.dark-theme .radar-container {
  width: 300px;
  height: 300px;
  margin: 20px auto;
}

body.dark-theme .trait-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
  margin: 20px 0;
}

body.dark-theme .trait-item {
  background: #1e2a44;
  padding: 12px;
  border-radius: 12px;
  text-align: center;
}

body.dark-theme .trait-name {
  font-weight: bold;
  color: #e94560;
}

body.dark-theme .trait-bar {
  height: 8px;
  background: #333;
  border-radius: 4px;
  margin-top: 5px;
  overflow: hidden;
}

body.dark-theme .trait-fill {
  height: 100%;
  background: #e94560;
  border-radius: 4px;
}

/* --------- TOAST --------- */

body.dark-theme .toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #1e1e1e;
  color: #fff;
  padding: 12px 20px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
  z-index: 1000;
  animation: toast 3s forwards;
  font-size: 14px;
}

@keyframes toast {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  10% {
    opacity: 1;
    transform: translateY(0);
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

/* --------- TAB AUTH & FORGOT LINK --------- */

body.dark-theme .auth-tabs {
  display: flex;
  margin-bottom: 20px;
  border-bottom: 2px solid #eee;
}

body.dark-theme .tab-btn {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 600;
  color: #ccc;
  cursor: pointer;
  transition: all 0.3s;
}

body.dark-theme .tab-btn.active {
  color: #e11d48;
  border-bottom: 3px solid #e11d48;
}

body.dark-theme .tab-btn:hover:not(.active) {
  color: #e11d48;
}

body.dark-theme .forgot-link {
  text-align: right;
  margin: 8px 0;
  font-size: 14px;
}

body.dark-theme .forgot-link a {
  color: #e11d48;
  text-decoration: none;
}

body.dark-theme .forgot-link a:hover {
  text-decoration: underline;
}

/* ===================== QUIZ ENGLISH – DARK MODE ===================== */

.dark .quiz-card {
  background: #020617;           /* slate-950 */
  border-color: #1e293b;         /* slate-800 */
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.6);
}

.dark .quiz-title {
  color: #e5e7eb;                /* text */
}

.dark .quiz-subtitle {
  color: #9ca3af;                /* slate-400 */
}

.dark .quiz-section-item {
  background: #020617;
  border-color: #1f2937;
}

.dark .quiz-section-item-title {
  color: #e5e7eb;
}

.dark .quiz-section-item-meta,
.dark .quiz-section-item-status {
  color: #9ca3af;
}

/* Passage, word bank, reorder */

.dark .quiz-passage {
  background: #020617;
  border-color: #1f2937;
  color: #e5e7eb;
}

.dark .quiz-passage-input input.quiz-blank {
  background: #020617;
  border-color: #374151;
  color: #e5e7eb;
}

.dark .quiz-wordbank {
  /* giữ layout, chỉ chỉnh màu chip */
}

.dark .quiz-wordchip {
  background: #020617;
  border-color: #4b5563;
  color: #e5e7eb;
}

.dark .reorder-bank,
.dark .reorder-dropzone {
  background: #020617;
  border-color: #374151;
}

.dark .reorder-dropzone {
  background: #020617;
}

.dark .reorder-chip {
  background: #020617;
  border-color: #4b5563;
  color: #e5e7eb;
}

.dark .reorder-chip.in-drop {
  background: #111827;
}

/* Input / textarea */

.dark .quiz-input,
.dark .quiz-textarea {
  background: #020617;
  border-color: #4b5563;
  color: #e5e7eb;
}

.dark .quiz-input::placeholder,
.dark .quiz-textarea::placeholder {
  color: #6b7280;
}

/* Khi sai câu */

.dark .quiz-input-wrong {
  background: #450a0a;
  border-color: #b91c1c;
}

.dark .quiz-blank-correct {
  background: #064e3b;
  border-color: #16a34a;
  color: #bbf7d0;
}

.dark .quiz-blank-wrong {
  background: #450a0a;
  border-color: #dc2626;
  color: #fecaca;
}

.dark .reorder-dropzone-wrong {
  background: #450a0a;
  border-color: #b91c1c;
}

/* Option hover & đúng/sai */

.dark .quiz-option {
  color: #e5e7eb;
}

.dark .quiz-option:hover {
  background: #111827;
}

.dark .quiz-option-correct {
  background: #065f46 !important;
  border-color: #16a34a;
  color: #bbf7d0;
}

.dark .quiz-option-wrong {
  background: #7f1d1d !important;
  border-color: #dc2626;
  color: #fee2e2;
}

/* Explanation */

.dark .quiz-explanation-box {
  border-top-color: #374151;
  color: #e5e7eb;
}

.dark .quiz-correct-line {
  color: #bbf7d0;
}

/* Modal */

.dark .quiz-modal-overlay {
  background: rgba(15, 23, 42, 0.8);
}

.dark .quiz-modal-card {
  background: #020617;
  border-color: #1f2937;
  color: #e5e7eb;
}

.dark .quiz-modal-card h3 {
  color: #e5e7eb;
}

/* Quiz – dark mode override */
body.dark-mode .quiz-card {
  background: #111827;
  border-color: #1f2937;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.6);
}
body.dark-mode .quiz-passage {
  background: #1f2937;
  color: #e5e7eb;
}
body.dark-mode .quiz-subtitle,
body.dark-mode .quiz-hint {
  color: #9ca3af;
}
body.dark-mode .sub-btn {
  background: #111827;
  border-color: #374151;
  color: #e5e7eb;
}
body.dark-mode .opt-correct {
  background: #064e3b;
}
body.dark-mode .opt-wrong {
  background: #7f1d1d;
}