/* CSS Variables */
:root {
  --fire-red: #C8102E;
  --fire-red-dark: #A00D24;
  --fire-red-light: #E8394F;
  --white: #FFFFFF;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;
  --success: #10B981;
  --success-light: #D1FAE5;
  --error: #EF4444;
  --error-light: #FEE2E2;
  --warning: #F59E0B;
  --warning-light: #FEF3C7;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius: 12px;
  --radius-sm: 8px;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Touch optimization */
@media (pointer: coarse) {
  .answer-option {
    min-height: 48px;
  }

  .btn {
    min-height: 44px;
  }

  .category-card {
    min-height: 48px;
  }

  .btn-icon {
    min-width: 44px;
    min-height: 44px;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
  min-height: 100vh;
  min-height: 100dvh;
  color: var(--gray-800);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

/* Header */
header {
  background: linear-gradient(135deg, var(--fire-red) 0%, var(--fire-red-dark) 100%);
  color: var(--white);
  padding: 1rem 1.5rem;
  padding-top: calc(1rem + env(safe-area-inset-top, 0px));
  padding-left: calc(1.5rem + env(safe-area-inset-left, 0px));
  padding-right: calc(1.5rem + env(safe-area-inset-right, 0px));
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fire-red);
}

.logo-icon svg {
  width: 28px;
  height: 28px;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
}

.subtitle {
  font-size: 0.875rem;
  opacity: 0.9;
  margin: 0;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.15);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
}

.user-info span {
  font-weight: 500;
}

.btn-icon {
  background: none;
  border: none;
  color: var(--white);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 50%;
  transition: background 0.2s;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.2);
}

.btn-icon svg {
  width: 24px;
  height: 24px;
}

/* Main Content */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.login-card {
  max-width: 400px;
  margin: 0 auto;
  text-align: center;
}

.login-card h2 {
  color: var(--fire-red);
  margin-bottom: 0.5rem;
}

.login-card p {
  color: var(--gray-500);
  margin-bottom: 2rem;
}

/* Form Elements */
.form-group {
  margin-bottom: 1.5rem;
  text-align: left;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--gray-700);
}

input[type="text"],
input[type="email"],
input[type="password"],
select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
select:focus {
  outline: none;
  border-color: var(--fire-red);
  box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.1);
}

/* Auth Error */
.auth-error {
  background: var(--error-light);
  color: var(--error);
  border: 1px solid var(--error);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
}

/* Auth Divider */
.auth-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
  color: var(--gray-400);
  font-size: 0.875rem;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--gray-200);
}

/* Fingerprint Button */
.btn-fingerprint {
  background: var(--gray-800);
  color: var(--white);
  border: 2px solid var(--gray-800);
}

.btn-fingerprint:hover {
  background: var(--gray-700);
  border-color: var(--gray-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-fingerprint svg {
  flex-shrink: 0;
}

/* Auth Switch */
.auth-switch {
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--gray-500);
}

.auth-switch a {
  color: var(--fire-red);
  font-weight: 600;
  text-decoration: none;
  margin-left: 0.25rem;
}

.auth-switch a:hover {
  text-decoration: underline;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--fire-red) 0%, var(--fire-red-dark) 100%);
  color: var(--white);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--fire-red-light) 0%, var(--fire-red) 100%);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

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

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.btn-secondary:hover {
  background: var(--gray-200);
}

.btn-large {
  width: 100%;
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* Categories Grid */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.category-card {
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  cursor: pointer;
  transition: all 0.2s;
}

.category-card:hover {
  border-color: var(--fire-red);
  background: var(--white);
}

.category-card.selected {
  border-color: var(--fire-red);
  background: linear-gradient(135deg, rgba(200, 16, 46, 0.05) 0%, rgba(200, 16, 46, 0.1) 100%);
}

.category-card h4 {
  color: var(--gray-800);
  margin-bottom: 0.25rem;
}

.category-card .question-count {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.quiz-options {
  margin-bottom: 1.5rem;
}

/* Retry Banner */
.retry-banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  background: var(--warning-light);
  border: 1px solid var(--warning);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-weight: 500;
  color: var(--gray-700);
}

.retry-banner-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.retry-banner-text {
  font-size: 0.9rem;
}

/* Category Actions */
.category-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn-weak-quiz {
  border: 2px solid var(--warning);
  background: var(--warning-light);
  color: var(--gray-700);
}

.btn-weak-quiz:hover {
  background: var(--warning);
  color: var(--white);
}

/* Quiz Progress */
.quiz-progress {
  margin-bottom: 1.5rem;
}

.progress-bar {
  height: 8px;
  background: var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--fire-red) 0%, var(--fire-red-light) 100%);
  border-radius: 4px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  display: flex;
  justify-content: space-between;
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--gray-600);
}

/* Quiz Card */
.quiz-card {
  position: relative;
}

.question-type-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--warning-light);
  color: var(--warning);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.question-text {
  font-size: 1.25rem;
  color: var(--gray-800);
  margin-bottom: 1.5rem;
  padding-right: 100px;
}

/* Answers */
.answers-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.answer-option {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.answer-option:hover:not(.disabled) {
  border-color: var(--fire-red);
  background: var(--white);
}

.answer-option.selected {
  border-color: var(--fire-red);
  background: linear-gradient(135deg, rgba(200, 16, 46, 0.05) 0%, rgba(200, 16, 46, 0.1) 100%);
}

.answer-option.correct {
  border-color: var(--success);
  background: var(--success-light);
}

.answer-option.wrong {
  border-color: var(--error);
  background: var(--error-light);
}

.answer-option.disabled {
  cursor: not-allowed;
}

.answer-checkbox,
.answer-radio {
  width: 24px;
  height: 24px;
  border: 2px solid var(--gray-300);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}

.answer-radio {
  border-radius: 50%;
}

.answer-option.selected .answer-checkbox,
.answer-option.selected .answer-radio {
  border-color: var(--fire-red);
  background: var(--fire-red);
  color: var(--white);
}

.answer-option.correct .answer-checkbox,
.answer-option.correct .answer-radio {
  border-color: var(--success);
  background: var(--success);
}

.answer-option.wrong .answer-checkbox,
.answer-option.wrong .answer-radio {
  border-color: var(--error);
  background: var(--error);
}

.answer-text {
  flex: 1;
  font-size: 1rem;
}

/* Feedback */
.feedback {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
}

.feedback.correct {
  background: var(--success-light);
  border: 1px solid var(--success);
}

.feedback.wrong {
  background: var(--error-light);
  border: 1px solid var(--error);
}

#feedback-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

#feedback-text {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.explanation {
  font-size: 0.875rem;
  color: var(--gray-600);
}

.quiz-actions {
  display: flex;
  justify-content: center;
}

/* Results */
.results-card {
  text-align: center;
}

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

.results-score {
  margin: 2rem 0;
}

.score-circle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--fire-red) 0%, var(--fire-red-dark) 100%);
  color: var(--white);
}

.score-circle span:first-child {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
}

.score-label {
  font-size: 1.25rem;
}

.results-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 2rem 0;
}

.stat {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-800);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-500);
}

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

/* Progress Screen */
.overall-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--gray-50);
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  text-align: center;
}

.stat-card .stat-value {
  font-size: 1.5rem;
  color: var(--fire-red);
}

.category-progress {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.category-progress-item {
  background: var(--gray-50);
  padding: 1rem;
  border-radius: var(--radius-sm);
}

.category-progress-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.category-progress-bar {
  height: 8px;
  background: var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
}

.category-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--fire-red) 0%, var(--success) 100%);
  border-radius: 4px;
}

.recent-sessions {
  margin-bottom: 2rem;
}

.session-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--gray-200);
}

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

.session-info {
  flex: 1;
}

.session-category {
  font-weight: 600;
  color: var(--gray-800);
}

.session-date {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.session-score {
  font-weight: 600;
  color: var(--fire-red);
}

.weak-areas {
  margin-bottom: 2rem;
}

.weak-item {
  padding: 1rem;
  background: var(--error-light);
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

.weak-item:last-child {
  margin-bottom: 0;
}

.weak-question {
  font-weight: 500;
  color: var(--gray-800);
  margin-bottom: 0.25rem;
}

.weak-meta {
  font-size: 0.875rem;
  color: var(--gray-600);
}

/* Profile Screen */
.profile-section {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--gray-200);
}

.profile-section:first-of-type {
  padding-top: 0;
}

.profile-section:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.profile-section h3 {
  margin-bottom: 1rem;
  color: var(--gray-800);
}

.profile-field {
  margin-bottom: 1rem;
  text-align: left;
}

.profile-field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--gray-700);
}

.profile-section .btn {
  margin-top: 0.5rem;
}

.profile-success {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid var(--success);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
}

.profile-status {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.status-active {
  background: var(--success-light);
  color: var(--success);
}

.status-inactive {
  background: var(--gray-100);
  color: var(--gray-500);
}

.profile-webauthn-status {
  margin-bottom: 0.5rem;
}

.profile-danger-text {
  color: var(--gray-600);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.btn-danger {
  background: var(--error);
  color: var(--white);
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-danger:hover {
  background: #DC2626;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 1rem;
  padding-bottom: calc(2rem + env(safe-area-inset-bottom, 0px));
  color: var(--gray-500);
  font-size: 0.875rem;
}

.skipped-info {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--warning);
}

.footer-links {
  margin-top: 0.5rem;
}

.footer-links a {
  color: var(--gray-500);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--fire-red);
  text-decoration: underline;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}

.modal-content {
  background: var(--white);
  border-radius: var(--radius);
  max-width: 600px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
  color: var(--fire-red);
  margin: 0;
}

.btn-modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--gray-500);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  line-height: 1;
}

.btn-modal-close:hover {
  background: var(--gray-100);
  color: var(--gray-800);
}

.modal-body {
  padding: 1.5rem 2rem;
}

.modal-body h3 {
  color: var(--gray-800);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.modal-body h3:first-child {
  margin-top: 0;
}

.modal-body p {
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

/* Utilities */
.hidden {
  display: none !important;
}

.screen {
  animation: fadeIn 0.3s ease;
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: 2rem;
  color: var(--gray-500);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* Responsive - Tablet */
@media (max-width: 1024px) {
  main {
    padding: 1.5rem 1rem;
  }

  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .overall-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .results-stats {
    gap: 2rem;
  }
}

/* Responsive - Smartphone */
@media (max-width: 640px) {
  header {
    padding: 0.75rem 1rem;
  }

  .logo {
    gap: 0.75rem;
  }

  .logo-icon {
    width: 40px;
    height: 40px;
  }

  .logo-icon svg {
    width: 22px;
    height: 22px;
  }

  .logo h1 {
    font-size: 1.125rem;
  }

  .subtitle {
    display: none;
  }

  .user-info {
    padding: 0.375rem 0.625rem;
  }

  .user-info span {
    display: none;
  }

  .btn-icon {
    padding: 0.5rem;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  main {
    padding: 1rem 0.75rem;
  }

  .card {
    padding: 1.25rem;
    border-radius: var(--radius-sm);
  }

  .card-header {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }

  .card-header .btn {
    align-self: flex-start;
  }

  .login-card {
    max-width: 100%;
  }

  .login-card h2 {
    font-size: 1.25rem;
  }

  .categories-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .category-card {
    padding: 1rem;
    min-height: 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .question-text {
    font-size: 1.05rem;
    padding-right: 0;
    line-height: 1.5;
  }

  .question-type-badge {
    position: static;
    display: inline-block;
    margin-bottom: 0.75rem;
  }

  .answer-option {
    padding: 0.875rem 1rem;
    min-height: 48px;
    gap: 0.75rem;
  }

  .answer-text {
    font-size: 0.9375rem;
  }

  .answers-list {
    gap: 0.625rem;
  }

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

  .quiz-actions .btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
    min-height: 48px;
  }

  .feedback {
    padding: 0.875rem 1rem;
  }

  #feedback-icon {
    font-size: 1.5rem;
  }

  .score-circle {
    width: 120px;
    height: 120px;
  }

  .score-circle span:first-child {
    font-size: 2.25rem;
  }

  .score-label {
    font-size: 1rem;
  }

  .results-stats {
    gap: 1.25rem;
  }

  .stat-value {
    font-size: 1.5rem;
  }

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

  .results-actions .btn {
    width: 100%;
    min-height: 48px;
  }

  .overall-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .stat-card {
    padding: 1rem;
  }

  .stat-card .stat-value {
    font-size: 1.25rem;
  }

  .session-item {
    padding: 0.875rem 0.5rem;
    flex-wrap: wrap;
    gap: 0.25rem;
  }

  .category-actions {
    gap: 0.625rem;
  }

  .category-actions .btn {
    min-height: 48px;
  }

  .btn-large {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }

  .form-group label {
    font-size: 0.9375rem;
  }

  input[type="text"],
  input[type="email"],
  input[type="password"],
  select {
    padding: 0.75rem 0.875rem;
    font-size: 1rem;
    min-height: 48px;
  }

  .progress-text {
    font-size: 0.8125rem;
  }

  .retry-banner {
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
  }

  .weak-item {
    padding: 0.875rem;
  }

  .weak-question {
    font-size: 0.9375rem;
  }

  .profile-section {
    padding: 1.25rem 0;
  }

  .btn-danger {
    width: 100%;
    min-height: 48px;
  }

  .modal-header {
    padding: 1rem 1.25rem;
  }

  .modal-body {
    padding: 1rem 1.25rem;
  }

  footer {
    padding: 1.5rem 0.75rem;
    font-size: 0.8125rem;
  }
}

/* Responsive - Small phones */
@media (max-width: 380px) {
  header {
    padding: 0.625rem 0.75rem;
  }

  .logo h1 {
    font-size: 1rem;
  }

  .logo-icon {
    width: 36px;
    height: 36px;
  }

  .logo-icon svg {
    width: 20px;
    height: 20px;
  }

  main {
    padding: 0.75rem 0.5rem;
  }

  .card {
    padding: 1rem;
  }

  .question-text {
    font-size: 1rem;
  }

  .score-circle {
    width: 100px;
    height: 100px;
  }

  .score-circle span:first-child {
    font-size: 1.75rem;
  }

  .score-label {
    font-size: 0.875rem;
  }

  .results-stats {
    flex-direction: column;
    gap: 0.75rem;
  }

  .overall-stats {
    grid-template-columns: 1fr 1fr;
  }
}