/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font);
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

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

.btn-success {
  background: var(--success);
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: white; }

.btn-sm { padding: 0.4rem 1rem; font-size: 0.85rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1.1rem; }
.btn-block { width: 100%; }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ========================================
   Cards
   ======================================== */

.subject-card, .feature-card, .tip-card, .chapter-card, .level-card, .results-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
  text-align: center;
  padding: 5rem 1.5rem;
  background: linear-gradient(135deg, #6c5ce711 0%, #00cec911 100%);
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  justify-content: center;
  margin-top: 3rem;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ========================================
   Features
   ======================================== */

.features {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
  text-align: center;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.feature-card {
  padding: 2rem;
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 1rem;
}

.feature-card h3 {
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ========================================
   Subject Cards
   ======================================== */

.subjects-preview, .subjects-grid {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.subject-preview-card, .subject-card-large {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2.5rem 2rem;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border-top: 4px solid var(--card-color, var(--primary));
  color: var(--text);
}

.subject-preview-card:hover, .subject-card-large:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  color: var(--text);
}

.subject-icon, .subject-icon-large {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.subject-preview-card h3, .subject-card-large h2 {
  margin-bottom: 0.5rem;
}

.subject-preview-card p, .subject-card-large p {
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
  text-align: center;
  padding: 4rem 1.5rem;
  background: linear-gradient(135deg, var(--primary), #a29bfe);
  color: white;
  margin-top: 2rem;
}

.cta-section h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.cta-section p {
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

.cta-section .btn-primary {
  background: white;
  color: var(--primary);
}

.cta-section .btn-primary:hover {
  background: var(--bg);
}

/* ========================================
   Auth Forms
   ======================================== */

.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 3rem 1.5rem;
}

.auth-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 450px;
}

.auth-card h1 {
  text-align: center;
  margin-bottom: 0.3rem;
}

.auth-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
  color: var(--text);
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 1rem;
  transition: border-color var(--transition);
  background: var(--bg);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.auth-link {
  text-align: center;
  margin-top: 1.5rem;
  color: var(--text-light);
  font-size: 0.9rem;
}

.auth-form .btn {
  margin-top: 0.5rem;
}

/* ========================================
   Dashboard
   ======================================== */

.dashboard {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.streak-badge {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--accent-light);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-xl);
  font-weight: 700;
}

.streak-fire { font-size: 1.3rem; }
.streak-count { font-size: 1.3rem; color: var(--text); }
.streak-label { font-size: 0.85rem; color: var(--text-light); }

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.subject-card {
  border-top: 4px solid var(--card-color, var(--primary));
}

.subject-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.progress-ring-container {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 1rem auto;
}

.progress-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-ring-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 8;
}

.progress-ring-fill {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s ease;
}

.progress-ring-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
}

.subject-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin: 1rem 0;
  text-align: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-weight: 700;
  font-size: 1.1rem;
}

.dashboard-bottom {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
}

.recent-activity, .tips-sidebar {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.recent-activity h2, .tips-sidebar h2 {
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.activity-list {
  list-style: none;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.activity-item:last-child { border-bottom: none; }

.activity-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.activity-icon.correct { background: var(--success-light); color: var(--success); }
.activity-icon.incorrect { background: var(--danger-light); color: var(--danger); }
.activity-icon.lesson { background: var(--primary-light); color: var(--primary); }

.activity-info {
  flex: 1;
  min-width: 0;
}

.activity-title {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.activity-meta {
  font-size: 0.8rem;
  color: var(--text-light);
}

.activity-points {
  font-weight: 700;
  color: var(--success);
  font-size: 0.85rem;
}

.tip-card-mini {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.tip-card-mini:last-child { border-bottom: none; }

.tip-card-mini h4 { margin-bottom: 0.3rem; font-size: 0.95rem; }
.tip-card-mini p { font-size: 0.85rem; color: var(--text-light); margin-bottom: 0.3rem; }
.tip-card-mini a { font-size: 0.85rem; font-weight: 600; }

/* ========================================
   Levels Grid
   ======================================== */

.levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.level-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 1.5rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text);
  font-weight: 700;
  transition: all var(--transition);
}

.level-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-lg);
  color: var(--primary);
}

.level-arrow { font-size: 1.2rem; }

/* ========================================
   Subject Header
   ======================================== */

.subject-header {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--card-color, var(--primary));
}

.subject-header h1 { margin-bottom: 0.5rem; }
.subject-header p { color: var(--text-light); margin-bottom: 1rem; }

.diagnostic-badge {
  background: var(--success-light);
  color: var(--success);
  padding: 0.75rem 1.2rem;
  border-radius: var(--radius);
  font-weight: 600;
  display: inline-block;
}

/* ========================================
   Chapters & Lessons
   ======================================== */

.chapters-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.chapter-card {
  overflow: hidden;
}

.chapter-header {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.chapter-number {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.2rem 0.8rem;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.chapter-header h2 { margin-bottom: 0.3rem; }
.chapter-header p { color: var(--text-light); font-size: 0.9rem; }

.lessons-list h3 {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
}

.lesson-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  color: var(--text);
  transition: all var(--transition);
  margin-bottom: 0.5rem;
}

.lesson-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.lesson-icon { font-size: 1.2rem; }
.lesson-title { flex: 1; font-weight: 600; }

.difficulty-badge {
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  font-size: 0.75rem;
  font-weight: 700;
}

.diff-1 { background: var(--success-light); color: var(--success); }
.diff-2 { background: var(--accent-light); color: #d4a017; }
.diff-3 { background: var(--danger-light); color: var(--danger); }

.chapter-actions {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* ========================================
   Lesson Content
   ======================================== */

.lesson-page .lesson-content {
  max-width: 800px;
}

.lesson-header {
  margin-bottom: 2rem;
}

.chapter-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.lesson-header h1 { margin-bottom: 0.5rem; }

.lesson-body {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.lesson-body h2 { margin: 1.5rem 0 0.75rem; color: var(--primary); }
.lesson-body h3 { margin: 1.2rem 0 0.5rem; }
.lesson-body p { margin-bottom: 1rem; }
.lesson-body ul, .lesson-body ol { margin: 0.5rem 0 1rem 1.5rem; }
.lesson-body li { margin-bottom: 0.3rem; }

.lesson-body code {
  background: var(--primary-light);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.lesson-body .example, .lesson-body .formula {
  background: var(--bg);
  border-left: 4px solid var(--primary);
  padding: 1rem 1.5rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1rem 0;
}

.lesson-body .tip-box {
  background: var(--accent-light);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.5rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1rem 0;
}

.lesson-actions {
  margin-bottom: 2rem;
}

.completed-badge {
  display: inline-block;
  background: var(--success-light);
  color: var(--success);
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 700;
}

.lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.lesson-exercises {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.lesson-exercises h2 {
  margin-bottom: 1rem;
}

/* ========================================
   Exercises
   ======================================== */

.exercise-progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.exercise-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 3px;
  transition: width 0.5s ease;
}

.exercise-counter {
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.exercise-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow);
  max-width: 700px;
  margin: 0 auto;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.exercise-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
}

.exercise-question {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.qcm-options, .tf-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.tf-options {
  flex-direction: row;
  gap: 1rem;
}

.qcm-option, .tf-option {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.qcm-option input, .tf-option input {
  display: none;
}

.qcm-label, .tf-label {
  display: block;
  width: 100%;
  padding: 1rem 1.2rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-weight: 600;
  transition: all var(--transition);
}

.qcm-option input:checked + .qcm-label,
.tf-option input:checked + .tf-label {
  border-color: var(--primary);
  background: linear-gradient(135deg, #f0edff, #e8e4ff);
  color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
  transform: scale(1.02);
}

.qcm-label:hover, .tf-label:hover {
  border-color: var(--primary);
  background: #fafafe;
  transform: translateX(4px);
}

.tf-label {
  text-align: center;
  flex: 1;
}

.fill-input {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  transition: border-color var(--transition);
}

.fill-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.exercise-feedback {
  padding: 1rem 1.2rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  animation: fadeIn 0.3s ease;
}

.exercise-feedback.correct {
  background: linear-gradient(135deg, #e6f9f1, #d4f5e9);
  color: #00856a;
  border-left: 4px solid var(--success);
  box-shadow: 0 4px 15px rgba(0, 184, 148, 0.15);
}

.exercise-feedback.incorrect {
  background: linear-gradient(135deg, #fde8e8, #fdd);
  color: #c0392b;
  border-left: 4px solid var(--danger);
  box-shadow: 0 4px 15px rgba(214, 48, 49, 0.1);
}

.exercise-feedback.correct::before {
  content: '';
  display: inline-block;
  margin-right: 0.5rem;
}

.exercise-feedback.incorrect::before {
  content: '';
  display: inline-block;
  margin-right: 0.5rem;
}

.exercise-actions {
  text-align: center;
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-next {
  background: var(--secondary);
  color: white;
  animation: fadeIn 0.3s ease;
}

.btn-next:hover {
  background: #00b5b0;
  color: white;
}

.feedback-explanation {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

.exercise-course-reminder {
  animation: fadeIn 0.3s ease;
  margin-bottom: 1rem;
}

.course-reminder-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.2rem;
  background: var(--primary-light);
  border-radius: var(--radius);
  border-left: 4px solid var(--primary);
}

.reminder-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.reminder-link {
  display: inline-block;
  margin-left: 0.75rem;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--primary);
}

.reminder-link:hover {
  text-decoration: underline;
}

.exercise-results {
  max-width: 500px;
  margin: 0 auto;
}

.results-card {
  text-align: center;
  padding: 2.5rem;
}

.results-score {
  margin: 1.5rem 0;
}

.score-number {
  font-size: 4rem;
  font-weight: 800;
  color: var(--primary);
}

.score-total {
  font-size: 1.5rem;
  color: var(--text-light);
}

.score-message {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.results-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========================================
   Quiz
   ======================================== */

.quiz-page {
  max-width: 700px;
  margin: 0 auto;
}

.quiz-intro {
  text-align: center;
  padding: 3rem 0;
}

.quiz-intro-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.quiz-intro h2 {
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.quiz-intro p {
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

.existing-result {
  background: var(--accent-light);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
}

.quiz-progress {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 3px;
  transition: width 0.5s ease;
}

.quiz-counter {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 2rem;
}

.quiz-question {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow);
  animation: fadeIn 0.3s ease;
  margin-bottom: 1rem;
}

.level-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.question-text {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.quiz-question .btn {
  width: 100%;
  margin-top: 1rem;
}

.quiz-loading {
  text-align: center;
  padding: 3rem;
  font-size: 1.2rem;
  color: var(--text-light);
}

.quiz-results {
  text-align: center;
  padding: 2rem 0;
}

.results-card.big {
  padding: 3rem;
}

.results-score-circle {
  margin: 2rem auto;
}

.big-score {
  font-size: 5rem;
  font-weight: 800;
  color: var(--score-color, var(--primary));
}

.big-total {
  font-size: 2rem;
  color: var(--text-light);
}

.results-percentage {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

.recommended-level {
  margin: 2rem 0;
}

.recommended-level h3 {
  margin-bottom: 0.75rem;
  color: var(--text-light);
}

.level-badge-large {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 0.75rem 2rem;
  border-radius: var(--radius-xl);
  font-size: 1.5rem;
  font-weight: 800;
}

.results-advice {
  max-width: 500px;
  margin: 1.5rem auto 0;
  color: var(--text-light);
}

.results-actions {
  margin-top: 2rem;
}

/* ========================================
   Progress Page
   ======================================== */

.streak-section {
  margin-bottom: 2rem;
}

.streak-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  box-shadow: var(--shadow);
}

.streak-fire-big { font-size: 2.5rem; }
.streak-number { font-size: 2.5rem; font-weight: 800; display: block; }
.streak-best { margin-left: auto; color: var(--text-light); font-size: 0.9rem; }

.progress-subjects {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.progress-subject-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--card-color, var(--primary));
}

.progress-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.stat-box {
  text-align: center;
  padding: 1rem;
  background: var(--bg);
  border-radius: var(--radius);
}

.stat-box .stat-value {
  display: block;
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 0.3rem;
}

.stat-box .stat-label {
  font-size: 0.85rem;
  color: var(--text-light);
}

.chart-container {
  margin-top: 1.5rem;
  max-height: 250px;
}

/* ========================================
   Progress Bar
   ======================================== */

.progress-bar-container {
  margin-top: 0.75rem;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}

.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.8s ease;
}

/* ========================================
   Tips
   ======================================== */

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tip-card {
  padding: 2rem;
  color: var(--text);
  display: flex;
  flex-direction: column;
}

.tip-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  color: var(--text);
}

.tip-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.tip-card h3 {
  margin-bottom: 0.5rem;
}

.tip-card p {
  color: var(--text-light);
  font-size: 0.9rem;
  flex: 1;
}

.tip-subject {
  display: inline-block;
  margin-top: 0.75rem;
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 600;
}

.tip-article {
  max-width: 700px;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow);
}

.tip-article h1 {
  margin-bottom: 0.5rem;
}

.tip-body {
  margin: 1.5rem 0 2rem;
  line-height: 1.8;
}

.tip-body p {
  margin-bottom: 1rem;
}

/* ========================================
   Evaluations
   ======================================== */

.eval-subject-section {
  margin-bottom: 2.5rem;
}

.eval-subject-title {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--card-color, var(--primary));
  display: inline-block;
}

.eval-level-title {
  color: var(--text-light);
  font-size: 1rem;
  margin: 1.5rem 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.eval-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.eval-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  color: var(--text);
  display: flex;
  flex-direction: column;
  border-left: 4px solid transparent;
}

.eval-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-left-color: var(--primary);
  color: var(--text);
}

.eval-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.eval-duration {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 600;
}

.eval-card h4 { margin-bottom: 0.4rem; }
.eval-card p { font-size: 0.9rem; color: var(--text-light); flex: 1; }

.eval-card-footer { margin-top: 1rem; }

.eval-note {
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius);
  display: inline-block;
}

.note-excellent { background: #d4edda; color: #155724; }
.note-good { background: var(--success-light); color: #00856a; }
.note-ok { background: var(--accent-light); color: #856404; }
.note-bad { background: var(--danger-light); color: #c0392b; }

.eval-not-done {
  font-size: 0.85rem;
  color: var(--text-lighter);
  font-style: italic;
}

/* Eval Intro */
.eval-intro {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
  padding: 2rem 0;
}

.eval-intro-icon { font-size: 4rem; margin-bottom: 1rem; }
.eval-intro h1 { margin-bottom: 0.75rem; }

.eval-meta {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.eval-subject-tag {
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.85rem;
}

.eval-level-tag {
  background: var(--bg);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.85rem;
}

.eval-desc { color: var(--text-light); margin-bottom: 1.5rem; font-size: 1.05rem; }

.eval-info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}

.eval-info-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg);
  padding: 1.2rem;
  border-radius: var(--radius-lg);
}

.eval-info-icon { font-size: 1.5rem; }
.eval-info-value { font-weight: 800; font-size: 1.2rem; }
.eval-info-label { font-size: 0.8rem; color: var(--text-light); }

.eval-best-result {
  background: var(--bg);
  padding: 1rem;
  border-radius: var(--radius);
  margin: 1.5rem 0;
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: center;
}

.eval-best-note { font-weight: 800; font-size: 1.2rem; padding: 0.3rem 0.8rem; border-radius: var(--radius); }
.eval-best-date { color: var(--text-light); font-size: 0.85rem; }

.eval-rules {
  text-align: left;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  box-shadow: var(--shadow);
}

.eval-rules h3 { margin-bottom: 0.75rem; }
.eval-rules ul { padding-left: 1.5rem; }
.eval-rules li { margin-bottom: 0.5rem; font-size: 0.95rem; color: var(--text-light); }

/* Eval Play */
.eval-play-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.eval-play-title h1 { font-size: 1.3rem; margin-bottom: 0.2rem; }
.eval-play-title span { font-size: 0.9rem; color: var(--text-light); }

.eval-timer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  font-weight: 800;
  font-size: 1.3rem;
}

.eval-timer.timer-warning { background: var(--accent-light); color: #856404; }
.eval-timer.timer-danger { background: var(--danger-light); color: var(--danger); animation: pulse 1s ease infinite; }

.timer-icon { font-size: 1.3rem; }

.eval-progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.eval-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 3px;
  transition: width 0.5s ease;
}

.eval-counter {
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.eval-question-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow);
  max-width: 700px;
  margin: 0 auto;
  animation: fadeInUp 0.3s ease;
}

.eval-question-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.eval-q-number {
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.85rem;
}

.eval-q-points {
  color: var(--text-light);
  font-weight: 600;
  font-size: 0.9rem;
}

.eval-question-text {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.eval-submitting {
  text-align: center;
  padding: 4rem 0;
}

.eval-submitting-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  animation: spin 0.8s linear infinite;
}

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

/* Eval Result */
.eval-result-hero {
  text-align: center;
  padding: 2rem 0 3rem;
}

.eval-result-hero h1 { margin-bottom: 0.3rem; }
.eval-result-hero > p { color: var(--text-light); margin-bottom: 2rem; }

.eval-note-display {
  margin: 1.5rem 0;
  padding: 2rem;
  border-radius: var(--radius-xl);
  display: inline-block;
}

.eval-note-display.note-excellent { background: linear-gradient(135deg, #d4edda, #c3e6cb); }
.eval-note-display.note-good { background: linear-gradient(135deg, #e6f9f1, #d4f5e9); }
.eval-note-display.note-ok { background: linear-gradient(135deg, #fff3cd, #ffeeba); }
.eval-note-display.note-bad { background: linear-gradient(135deg, #f8d7da, #f5c6cb); }

.eval-note-number {
  font-size: 4rem;
  font-weight: 800;
  animation: scaleIn 0.6s var(--bounce);
}

.eval-note-max {
  font-size: 1.5rem;
  opacity: 0.6;
}

.eval-result-stats {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin: 2rem 0;
}

.eval-stat {
  text-align: center;
}

.eval-stat-value { display: block; font-weight: 800; font-size: 1.3rem; }
.eval-stat-label { font-size: 0.85rem; color: var(--text-light); }

.eval-result-message p {
  font-size: 1.1rem;
  font-weight: 600;
  padding: 1rem 2rem;
  border-radius: var(--radius);
  display: inline-block;
}

.msg-excellent { background: #d4edda; color: #155724; }
.msg-good { background: var(--success-light); color: #00856a; }
.msg-ok { background: var(--accent-light); color: #856404; }
.msg-bad { background: var(--danger-light); color: #c0392b; }

/* Correction */
.eval-correction {
  max-width: 700px;
  margin: 2rem auto;
}

.eval-correction h2 { margin-bottom: 1.5rem; }

.eval-correction-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
  border-left: 4px solid transparent;
}

.eval-correction-item.correct { border-left-color: var(--success); }
.eval-correction-item.incorrect { border-left-color: var(--danger); }

.correction-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.correction-num {
  background: var(--bg);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.85rem;
}

.correction-status { font-weight: 700; font-size: 0.9rem; }
.correct .correction-status { color: var(--success); }
.incorrect .correction-status { color: var(--danger); }

.correction-points { margin-left: auto; font-size: 0.85rem; color: var(--text-light); }

.correction-question { font-size: 0.95rem; margin-bottom: 0.5rem; color: var(--text); }

.correction-answers {
  background: var(--bg);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin: 0.5rem 0;
  font-size: 0.9rem;
}

.your-answer { color: var(--danger); margin-bottom: 0.3rem; }
.good-answer { color: var(--success); }

.correction-explanation {
  font-size: 0.9rem;
  color: var(--text-light);
  font-style: italic;
  margin-top: 0.5rem;
}

.eval-result-actions {
  text-align: center;
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* History */
.eval-history { margin-top: 3rem; }
.eval-history h2 { margin-bottom: 1rem; }

.eval-history-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.eval-history-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text);
  transition: all var(--transition);
}

.eval-history-item:hover {
  box-shadow: var(--shadow-lg);
  color: var(--text);
  transform: translateX(4px);
}

.eval-history-info { flex: 1; }
.eval-history-info strong { display: block; font-size: 0.95rem; }
.eval-history-info span { font-size: 0.8rem; color: var(--text-light); }

.eval-history-note {
  font-weight: 800;
  font-size: 1.1rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius);
}

.eval-history-date {
  font-size: 0.8rem;
  color: var(--text-lighter);
}