:root {
  --bg: #0f172a; --card: #111827; --muted: #94a3b8; --text: #e5e7eb;
  --accent: #22c55e; --danger: #ef4444; --primary: #3b82f6; --border: #1f2937;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}
* { box-sizing: border-box; }
.quiz-progress.passed {
  color: #4CAF50;
  font-weight: bold;
}

.quiz-progress.failed {
  color: #f44336;
  font-weight: bold;
}

.quiz-progress.in-progress {
  color: #FF9800;
  font-weight: bold;
}

.quiz-progress.not-started {
  color: #999;
}

.progress-summary {
  background: #f5f5f5;
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  border-left: 4px solid var(--primary);
}

.overall-progress h3 {
  color: var(--primary);
  margin: 0 0 15px 0;
}

.progress-stats {
  display: grid;
  gap: 10px;
}

.stat {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid #eee;
}

.stat:last-child {
  border-bottom: none;
}

.stat-label {
  font-weight: 500;
  color: #333;
}

.stat-value {
  font-weight: bold;
}

.stat-value.passed {
  color: #4CAF50;
}

.stat-value.not-passed {
  color: #666;
}

header h1.progress-passed {
  color: #4CAF50;
}

header h1.progress-in-progress {
  color: #FF9800;
}

header h1.progress-not-started {
  color: var(--text);
}

/* Progress Indicator Styles */
.quiz-progress.passed {
  color: #4CAF50;
  font-weight: bold;
}

.quiz-progress.failed {
  color: #f44336;
  font-weight: bold;
}

.quiz-progress.in-progress {
  color: #FF9800;
  font-weight: bold;
}

.quiz-progress.not-started {
  color: #999;
}

.progress-summary {
  background: #f5f5f5;
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  border-left: 4px solid var(--primary);
}

.overall-progress h3 {
  color: var(--primary);
  margin: 0 0 15px 0;
}

.progress-stats {
  display: grid;
  gap: 10px;
}

.stat {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid #eee;
}

.stat:last-child {
  border-bottom: none;
}

.stat-label {
  font-weight: 500;
  color: #333;
}

.stat-value {
  font-weight: bold;
}

.stat-value.passed {
  color: #4CAF50;
}

.stat-value.not-passed {
  color: #666;
}

header h1.progress-passed {
  color: #4CAF50;
}

header h1.progress-in-progress {
  color: #FF9800;
}

header h1.progress-not-started {
  color: var(--text);
}

body {
  margin: 0; font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
  background: radial-gradient(1200px 600px at 20% 0%, #0b1024 0%, var(--bg) 50%, #0a0f20 100%);
  color: var(--text); line-height: 1.6; display: flex; min-height: 100vh;
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: rgba(15, 23, 42, 0.5); border-radius: 4px; }
::-webkit-scrollbar-thumb { background: rgba(59, 130, 246, 0.3); border-radius: 4px; transition: background 0.3s; }
::-webkit-scrollbar-thumb:hover { background: rgba(59, 130, 246, 0.5); }
* { scrollbar-width: thin; scrollbar-color: rgba(59, 130, 246, 0.3) rgba(15, 23, 42, 0.5); }

.menu-toggle {
  display: none; position: fixed; top: 20px; left: 20px; z-index: 1000;
  background: var(--primary); color: white; border: none; padding: 12px 16px;
  border-radius: 8px; cursor: pointer; font-size: 18px; box-shadow: var(--shadow);
}

.global-action-bar {
  width: 100%;
  display: none;
  gap: 12px;
  padding: 16px 20px;
  margin-top: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  flex-wrap: wrap;
  justify-content: center;
  box-shadow: 0 15px 35px rgba(0,0,0,0.25);
}
.global-action-btn {
  background: rgba(255,255,255,0.2);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all 0.3s ease;
}

.global-action-btn:hover:not([disabled]) {
  background: rgba(255,255,255,0.3);
  border-color: rgba(255,255,255,0.5);
}

.global-action-btn.accent {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-color: transparent;
  color: white;
  box-shadow: 0 8px 20px rgba(59,130,246,0.35);
}

.global-action-btn.accent:hover:not([disabled]) {
  filter: brightness(1.05);
}

.global-action-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

.floating-submit-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 900;
  background: rgba(255,255,255,0.2);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 14px 28px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all 0.3s ease;
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
  display: none;
}

.floating-submit-btn:hover {
  background: rgba(255,255,255,0.3);
  border-color: rgba(255,255,255,0.5);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.4);
}

aside {
  width: 320px; background: var(--card); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; position: fixed; height: 100vh; z-index: 500;
  transition: transform 0.3s ease;
}

.sidebar-header { padding: 25px 20px; border-bottom: 1px solid var(--border); cursor: pointer; 
  position: relative; z-index: 1; margin-top: 0; }
.global-score-box {
  margin: 15px; padding: 20px; background: rgba(255,255,255,0.03);
  border-radius: 12px; border: 1px solid var(--border); text-align: center;
}
.global-score-box span { display: block; font-size: 0.75rem; color: var(--muted); text-transform: uppercase; margin-bottom: 5px; }
.global-score-box strong { font-size: 1.8rem; transition: color 0.3s; }
.attempted-text { font-size: 0.9rem; color: var(--muted); margin-top: 4px; font-weight: 500; }
.pass-msg { font-size: 0.75rem; color: #60a5fa; margin-top: 10px; font-style: italic; line-height: 1.2; }

nav { flex: 1; overflow-y: auto; padding: 10px 0; }
.nav-item { padding: 14px 20px; cursor: pointer; border-bottom: 1px solid rgba(255,255,255,0.02); font-weight: 500; }
.sub-menu { display: none; background: #0b1221; }
.sub-menu.active { display: block; }
.sub-item { padding: 12px 35px; font-size: 0.9rem; color: var(--muted); cursor: pointer; border-left: 3px solid transparent; }
.sub-item:hover { background: rgba(255,255,255,0.02); color: white; }
.sub-item.active { color: var(--primary); border-left-color: var(--primary); }

main { flex: 1; margin-left: 320px; padding: 40px; display: flex; justify-content: center; }
.container { max-width: 850px; width: 100%; }
.home-dashboard { display: flex; flex-direction: column; gap: 24px; padding-top: 20px; }
.home-welcome h1 { margin: 0 0 8px 0; font-size: 2rem; }
.home-welcome p { margin: 0; color: var(--muted); }
.info-section { background: rgba(15,23,42,0.8); border: 1px solid var(--border); border-radius: 16px; padding: 20px; box-shadow: var(--shadow); }
.info-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.info-header h3 { margin: 0; }
.info-header p { margin: 6px 0 0; color: var(--muted); }
.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.info-card { background: rgba(255,255,255,0.03); border: 1px solid var(--border); border-radius: 12px; padding: 18px; box-shadow: var(--shadow); }
.info-label { display: block; font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.info-value { display: block; font-size: 1.05rem; font-weight: 600; color: var(--text); }
.info-hint { display: block; font-size: 0.8rem; color: var(--muted); margin-top: 6px; }
.payment-card { background: rgba(15,23,42,0.8); border: 1px solid var(--border); border-radius: 16px; padding: 24px; box-shadow: var(--shadow); }
.payment-card-header { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; border-bottom: 1px solid rgba(255,255,255,0.05); margin-bottom: 18px; padding-bottom: 12px; }
.payment-card-header h3 { margin: 0 0 6px 0; }
.payment-card-header p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.payment-status { align-self: center; background: rgba(255,255,255,0.08); border-radius: 999px; padding: 6px 16px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.payment-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.payment-field { background: rgba(255,255,255,0.02); border: 1px dashed rgba(255,255,255,0.08); border-radius: 10px; padding: 12px 14px; }
.payment-label { display: block; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 4px; }
.payment-value { font-size: 1rem; font-weight: 600; color: var(--text); }
.payment-note { margin-top: 18px; font-size: 0.9rem; color: var(--muted); }
.quiz-card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow); overflow: hidden; }
.quiz-header { padding: 14px 18px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.progress-bar { width: 170px; height: 7px; background: #0b1221; border-radius: 7px; overflow: hidden; border: 1px solid var(--border); }
.progress-fill { height: 100%; width: 0%; background: var(--primary); transition: width 0.3s; }

.quiz-card h3 { font-size: 1.05rem; margin: 0 0 14px; }
.option { display: flex; gap: 8px; padding: 10px; border: 1px solid var(--border); background: #0b1221; border-radius: 9px; cursor: pointer; margin-bottom: 8px; font-size: 0.9rem; }
.feedback { font-weight: 700; margin-top: 15px; padding: 10px; border-radius: 8px; }
.feedback.correct { color: var(--accent); background: rgba(34, 197, 94, 0.1); }
.feedback.incorrect { color: var(--danger); background: rgba(239, 68, 68, 0.1); }

.btn { padding: 12px 24px; border-radius: 10px; font-weight: 600; cursor: pointer; border: none; }
.btn-primary { background: var(--primary); color: white; }

/* Content display styles */
.content-header {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 20px;
  border-radius: 12px 12px 0 0;
  margin: -25px -25px 25px -25px;
}

.back-button {
  background: rgba(255,255,255,0.2);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  margin-bottom: 15px;
  transition: all 0.3s ease;
}

.back-button:hover {
  background: rgba(255,255,255,0.3);
  border-color: rgba(255,255,255,0.5);
}

.content-body {
  line-height: 1.6;
  font-size: 16px;
  max-width: none;
}

.content-body h2 {
  color: var(--primary);
  border-bottom: 3px solid var(--accent);
  padding-bottom: 10px;
  margin-top: 30px;
  margin-bottom: 20px;
}

.content-body h3 {
  color: var(--secondary);
  margin-top: 25px;
  margin-bottom: 15px;
}

.content-body p {
  margin-bottom: 15px;
  text-align: justify;
}

.content-body ul, .content-body ol {
  margin-bottom: 15px;
  padding-left: 25px;
}

.content-body li {
  margin-bottom: 8px;
}

.highlight-box, .success-box, .warning-box, .danger-box {
  padding: 18px;
  margin: 20px 0;
  border-radius: 8px;
  border-left: 4px solid;
}

.highlight-box {
  background: rgba(59, 130, 246, 0.1);
  border-left-color: var(--primary);
}

.success-box {
  background: rgba(34, 197, 94, 0.1);
  border-left-color: #22c55e;
}

.warning-box {
  background: rgba(245, 158, 11, 0.1);
  border-left-color: #f59e0b;
}

.danger-box {
  background: rgba(239, 68, 68, 0.15);
  border-left-color: #ef4444;
}

.loading {
  text-align: center;
  padding: 40px;
  font-size: 18px;
  color: var(--text-secondary);
}

.error-message {
  text-align: center;
  padding: 40px;
  color: #ef4444;
}

.retry-button {
  background: var(--primary);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 15px;
}

.retry-button:hover {
  background: var(--secondary);
}
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--muted); }
.btn-warning {
  background: #f39c12;
  color: white;
  border: 2px solid #f39c12;
  padding: 12px 24px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s ease;
}
.btn-warning:hover {
  background: #e67e22;
  border-color: #e67e22;
}

/* Retake Quiz Modal Styles */
.retake-modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 10000;
  justify-content: center;
  align-items: center;
}
.retake-modal-overlay.active {
  display: flex;
}
.retake-modal-box {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 30px;
  max-width: 450px;
  width: 90%;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  text-align: center;
  border: 1px solid var(--border);
}
.retake-modal-box h3 {
  color: #f39c12;
  margin-bottom: 20px;
  font-size: 1.4rem;
}
.retake-modal-box p {
  color: var(--text);
  margin-bottom: 25px;
  font-size: 1.1rem;
  line-height: 1.6;
}
.retake-modal-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
}
.retake-modal-buttons button {
  padding: 12px 30px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
}
.retake-btn-confirm {
  background: #e74c3c;
  color: white;
}
.retake-btn-confirm:hover {
  background: #c0392b;
}
.retake-btn-cancel {
  background: #7f8c8d;
  color: white;
}
.retake-btn-cancel:hover {
  background: #606c6d;
}

.content-section { padding: 30px; max-height: 70vh; overflow-y: auto; }

.form-group { 
  margin-bottom: 16px; 
}

.form-group label { 
  display: block; margin-bottom: 6px; font-weight: 600; 
  color: var(--text); font-size: 0.9rem; 
}

.form-group input, .form-group select { 
  width: 100%; padding: 12px 14px; background: rgba(15, 23, 42, 0.8); 
  border: 1px solid rgba(59, 130, 246, 0.2); border-radius: 10px; 
  color: var(--text); font-size: 1rem; transition: all 0.3s;
  backdrop-filter: blur(10px);
}

.form-group input:focus, .form-group select:focus { 
  outline: none; border-color: var(--primary); 
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  background: rgba(15, 23, 42, 0.9);
}

.form-group select option {
  background: var(--card);
  color: var(--text);
  padding: 10px;
}

.form-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}

.form-row-thirds {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px;
}

@media (max-width: 640px) {
  .form-row, .form-row-thirds {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .auth-modal-content {
    padding: 24px;
  }
}
.form-group datalist { background: var(--card); }
.error-msg { color: var(--danger); font-size: 0.875rem; margin-top: 5px; display: none; }

/* Authentication Modal Styles */
.auth-modal {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.85); z-index: 10000; display: flex;
  align-items: center; justify-content: center; backdrop-filter: blur(8px);
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.auth-modal-content {
  background: linear-gradient(135deg, var(--card) 0%, #0f1729 100%);
  border-radius: 20px; padding: 32px; max-width: 600px; width: 95%;
  max-height: 95vh; overflow-y: auto; border: 1px solid rgba(59, 130, 246, 0.2);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(59, 130, 246, 0.1);
  animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.auth-tabs {
  display: flex; margin-bottom: 24px; background: rgba(15, 23, 42, 0.6);
  border-radius: 12px; padding: 4px; border: 1px solid rgba(59, 130, 246, 0.1);
}

.auth-tab {
  flex: 1; padding: 12px 20px; background: transparent; border: none;
  color: var(--muted); cursor: pointer; font-size: 1rem; font-weight: 600;
  border-radius: 8px; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.auth-tab.active {
  color: white; background: linear-gradient(135deg, var(--primary), #1e40af);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.auth-tab:hover:not(.active) {
  color: var(--text); background: rgba(59, 130, 246, 0.1);
}

.auth-form h2 {
  margin: 0 0 24px 0; color: var(--text); text-align: center;
  font-size: 1.75rem; font-weight: 700;
  background: linear-gradient(135deg, var(--primary), #06b6d4);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-submit {
  width: 100%; margin-top: 24px; font-size: 1.1rem; padding: 14px;
  background: linear-gradient(135deg, var(--primary), #1e40af);
  border: none; border-radius: 12px; font-weight: 600;
  transition: all 0.3s; position: relative; overflow: hidden;
}

.auth-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.auth-submit:active {
  transform: translateY(0);
}

.auth-message {
  margin-top: 15px; padding: 10px; border-radius: 8px; text-align: center;
  font-weight: 500; display: none;
}

.auth-message.success {
  background: rgba(34, 197, 94, 0.1); color: var(--accent); display: block;
}

.auth-message.error {
  background: rgba(239, 68, 68, 0.1); color: var(--danger); display: block;
}

.password-requirements {
  font-size: 0.75rem; color: rgba(156, 163, 175, 0.8); margin-top: 4px;
  line-height: 1.3; padding: 6px 8px; background: rgba(15, 23, 42, 0.4);
  border-radius: 6px; border-left: 2px solid var(--primary);
}

.password-input-container {
  position: relative;
  display: flex;
  align-items: center;
}

.password-input-container input {
  padding-right: 40px;
  flex: 1;
}

.password-toggle {
  position: absolute; right: 12px; cursor: pointer; user-select: none;
  font-size: 1.1rem; color: rgba(156, 163, 175, 0.7); z-index: 1;
  padding: 4px; border-radius: 4px; transition: all 0.2s;
}

.password-toggle:hover {
  color: var(--primary); background-color: rgba(59, 130, 246, 0.1);
}

.password-toggle.active {
  color: var(--primary);
}

@media (max-width: 768px) {
  .menu-toggle { display: block; }
  aside { transform: translateX(-100%); }
  aside.mobile-open { transform: translateX(0); }
  .sidebar-header { padding-top: 70px; } /* Add space for menu button */
  main { margin-left: 0; padding: 80px 20px 20px 20px; }
  .quiz-header { flex-direction: column; align-items: flex-start; }
  .progress-bar { width: 100%; }
  .content-section { padding: 20px; max-height: 60vh; }
}