:root {
  --cp-green: #1e4d2b;
  --cp-green-light: #2d6b3f;
  --cp-gold: #C7A84F;
  --cp-gold-light: #d4bc73;
  --white: #FFFFFF;
  --gray-50: #f5f5f5;
  --gray-100: #f0f0f0;
  --gray-200: #e5e7eb;
  --gray-300: #ddd;
  --gray-500: #6b7280;
  --gray-700: #333;
  --gray-900: #111827;
  --radius: 4px;
  --radius-lg: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
  min-height: 100vh;
  padding: 20px;
}

/* Logos */
.logos {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  gap: 20px;
}

.logos img {
  height: 70px;
  width: auto;
}

/* Header */
.header {
  background-color: var(--cp-green);
  color: var(--white);
  padding: 30px;
  text-align: center;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.025em;
}

.header .subtitle {
  color: var(--cp-gold);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* Main container */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0;
}

/* Screens */
.screen {
  display: none;
}

.screen.active {
  display: block;
}

/* Cards */
.card {
  background: var(--white);
  border-radius: 0;
  box-shadow: none;
  padding: 30px;
  margin-bottom: 0;
}

/* First card directly under header gets connected styling */
.screen.active > .card:first-child {
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.card h2 {
  color: var(--cp-green);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--gray-700);
  margin-bottom: 1rem;
}

.course-link {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 1.25rem;
}

.course-link a {
  color: var(--cp-green);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.course-link a:hover {
  color: var(--cp-gold);
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 0.375rem;
  font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group input[type="email"] {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 16px;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--cp-green);
  box-shadow: 0 0 0 3px rgba(30, 77, 43, 0.15);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--cp-green);
  color: var(--white);
  width: 100%;
}

.btn-primary:hover {
  background-color: var(--cp-green-light);
}

.btn-gold {
  background-color: var(--cp-gold);
  color: var(--cp-green);
}

.btn-gold:hover {
  background-color: var(--cp-gold-light);
}

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

/* Progress bar */
.progress-container {
  background: var(--gray-200);
  border-radius: 999px;
  height: 8px;
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--cp-green), var(--cp-gold));
  border-radius: 999px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  text-align: right;
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-bottom: 0.375rem;
}

/* Timer */
.timer {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--cp-green);
  margin-bottom: 1rem;
  padding: 0.5rem;
  background: var(--gray-100);
  border-radius: var(--radius);
}

.timer.warning {
  color: #b91c1c;
  background: #fef2f2;
}

/* Question cards */
.question-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: 24px;
  margin-bottom: 16px;
  border-left: 4px solid var(--cp-green);
}

.question-card .question-number {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--cp-gold);
  margin-bottom: 0.375rem;
}

.question-card .question-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 1rem;
}

.question-card .question-type-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  margin-bottom: 0.5rem;
}

.question-type-badge.mcq {
  background: rgba(30, 77, 43, 0.1);
  color: var(--cp-green);
}

.question-type-badge.frq {
  background: rgba(199, 168, 79, 0.2);
  color: #8a7030;
}

/* MCQ options */
.options-list {
  list-style: none;
}

.options-list li {
  margin-bottom: 0.5rem;
}

.options-list label {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  padding: 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
  font-size: 0.95rem;
  color: var(--gray-700);
}

.options-list label:hover {
  background-color: var(--gray-50);
  border-color: var(--cp-green);
}

.options-list input[type="radio"] {
  margin-top: 0.2rem;
  accent-color: var(--cp-green);
  flex-shrink: 0;
}

.options-list input[type="radio"]:checked + span {
  color: var(--cp-green);
  font-weight: 600;
}

/* FRQ textarea */
.frq-textarea {
  width: 100%;
  min-height: 120px;
  padding: 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 16px;
  resize: vertical;
  transition: border-color 0.2s;
}

.frq-textarea:focus {
  outline: none;
  border-color: var(--cp-green);
  box-shadow: 0 0 0 3px rgba(30, 77, 43, 0.15);
}

.char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 0.25rem;
}

.char-count.over {
  color: #b91c1c;
  font-weight: 600;
}

/* Submission screen */
.submission-icon {
  text-align: center;
  font-size: 3rem;
  margin-bottom: 1rem;
}

.submission-summary {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-top: 1rem;
}

.submission-summary h3 {
  font-size: 0.9rem;
  color: var(--cp-green);
  margin-bottom: 0.75rem;
}

.summary-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-200);
}

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

.summary-item .summary-question {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.25rem;
}

.summary-item .summary-answer {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.summary-item .summary-answer.unanswered {
  font-style: italic;
  color: var(--gray-300);
}

/* Score banner */
.score-banner {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.score-columns {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.score-column {
  flex: 1;
  max-width: 200px;
  text-align: center;
}

.score-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-500);
  margin-bottom: 0.25rem;
}

.score-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--cp-green);
  margin-bottom: 0.75rem;
}

.score-value.best {
  color: var(--cp-gold);
}

.score-bar-track {
  background: var(--gray-200);
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
  max-width: 300px;
  margin: 0 auto;
}

.score-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cp-green), var(--cp-gold));
  border-radius: 999px;
  transition: width 0.5s ease;
}

.attempt-info {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 0.75rem;
}

.unanswered-warning {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  color: #b91c1c;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
}

.question-card.unanswered-highlight {
  border-left-color: #dc2626;
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.2);
}

/* MCQ result items */
.summary-mcq {
  border-left: 4px solid var(--gray-200);
  padding-left: 1rem;
}

.summary-mcq.correct {
  border-left-color: #16a34a;
  background: #f0fdf4;
}

.summary-mcq.incorrect {
  border-left-color: #dc2626;
  background: #fef2f2;
}

.summary-mcq.unanswered {
  border-left-color: var(--gray-300);
}

.result-icon {
  font-weight: 700;
  margin-right: 0.375rem;
}

.result-icon.correct {
  color: #16a34a;
}

.result-icon.incorrect {
  color: #dc2626;
}

/* Wrong answer explanations */
.explanation {
  font-size: 0.85rem;
  color: #991b1b;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  padding: 0.625rem 0.875rem;
  margin-top: 0.5rem;
  line-height: 1.5;
}

.correct-answer {
  font-size: 0.85rem;
  color: #166534;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius);
  padding: 0.625rem 0.875rem;
  margin-top: 0.375rem;
  line-height: 1.5;
}

/* Returning user banner */
.returning-user-banner {
  border-left: 4px solid #16a34a;
  background: #f0fdf4;
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  color: var(--gray-700);
}

.returning-user-banner strong {
  color: #16a34a;
  font-size: 1rem;
}

.returning-user-banner p {
  margin: 0.375rem 0 0;
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* Utilities */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

/* Tab Navigation */
.tab-nav {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--gray-200);
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gray-500);
  transition: color 0.2s, border-color 0.2s;
  margin-bottom: -2px;
}

.tab-btn:hover {
  color: var(--cp-green-light);
}

.tab-btn.active {
  color: var(--cp-green);
  border-bottom-color: var(--cp-green);
}

.tab-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: transparent;
  color: var(--gray-500);
  font-size: 0.75rem;
  font-weight: 700;
  border: 2px solid var(--gray-300);
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.tab-btn.active .tab-step {
  background: transparent;
  color: var(--cp-green);
  border-color: var(--cp-green);
}

.tab-step.completed {
  background: var(--cp-green);
  color: var(--white);
  border-color: var(--cp-green);
}

.tab-btn.locked {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* Finish tab panel */
.finish-card {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--gray-200);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.finish-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.finish-card h2 {
  color: var(--cp-green);
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

.finish-card p {
  color: var(--gray-600);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 500px;
  margin: 0 auto;
}

/* Result action buttons */
.result-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}

.result-actions .btn {
  width: auto;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* Save status message */
.save-status {
  text-align: center;
  padding: 0.625rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.save-status.success {
  background: #f0fdf4;
  color: #16a34a;
  border: 1px solid #bbf7d0;
}

.save-status.error {
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fecaca;
}

/* CAPTCHA */
.captcha-container {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.captcha-error {
  text-align: center;
  color: #b91c1c;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* OTP verification screen */
.otp-email-highlight {
  color: var(--cp-green);
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

.otp-form-group {
  display: flex;
  justify-content: center;
}

.otp-input {
  width: 180px;
  padding: 14px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.5em;
  font-family: monospace;
  transition: border-color 0.2s;
}

.otp-input:focus {
  outline: none;
  border-color: var(--cp-green);
  box-shadow: 0 0 0 3px rgba(30, 77, 43, 0.15);
}

.otp-error {
  text-align: center;
  color: #b91c1c;
  font-size: 0.9rem;
  font-weight: 600;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.otp-resend-text,
.otp-back-text {
  font-size: 0.9rem;
  color: var(--gray-500);
}

.btn-link {
  background: none;
  border: none;
  color: var(--cp-green);
  font-weight: 600;
  cursor: pointer;
  font-size: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  padding: 0;
}

.btn-link:hover {
  color: var(--cp-gold);
}

.btn-link:disabled {
  color: var(--gray-300);
  cursor: not-allowed;
  text-decoration: none;
}

/* Responsive */
@media (max-width: 600px) {
  body {
    padding: 10px;
  }

  .card, .question-card {
    padding: 20px;
  }

  .header {
    padding: 20px;
  }

  .header h1 {
    font-size: 1.25rem;
  }

  .logos img {
    height: 50px;
  }

  .tab-nav {
    gap: 0.25rem;
  }

  .tab-btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
  }

  .result-actions {
    flex-direction: column;
  }

  .result-actions .btn {
    width: 100%;
  }
}