:root {
  --primary: hsl(202, 85%, 61%);
  --primary-light: hsl(212, 72%, 70%);
  --primary-light-1: hsl(207, 100%, 97%);
  --primary-1: hsl(207, 85%, 62%);
  --primary-dark: hsl(207, 73%, 57%);
  --secondary-0: hsl(0, 69%, 95%);
  --secondary: hsl(0, 69%, 67%);
  --secondary-1: hsl(0, 60%, 60%);
  --secondary-2: hsl(0, 64%, 55%);
  --secondary-box-shadow: hsl(0 69% 85% / 0.9);
  --tertiary: hsl(230, 80%, 72%);
  --tertiary-dark: #6772e5;
  --text-dark-1: #333333;
  --text-medium-1: #555555;
  --text-light-1: #777777;
  --text-dark: #2c2c2c;
  --text-medium: #5a5a5a;
  --text-light: #757575;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  --error-color: #ef4444;
  --warning-color: #f59e0b;
  --success-color: #10b981;
  --info-color: var(--primary);
}

#nihonez-primary .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 0;
}

.header {
  text-align: center;
  margin-bottom: 3rem;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.header .subtitle {
  color: var(--text-medium);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.ai-badge {
  background: linear-gradient(45deg, var(--tertiary), var(--tertiary-dark));
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.input-card {
  background: var(--bg-white);
  border-radius: 1rem;
  box-shadow: var(--box-shadow);
  padding: 2rem;
  margin-bottom: 2rem;
}

.input-label {
  display: block;
  color: var(--text-dark);
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.text-input {
  width: 100%;
  padding: 1.25rem;
  border: 2px solid #e2e8f0;
  border-radius: 0.75rem;
  font-size: 1.2rem;
  color: var(--text-dark);
  background: var(--bg-white);
  transition: all 0.3s ease;
  resize: vertical;
  min-height: 150px;
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.text-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px hsla(202, 85%, 61%, 0.1);
}

.check-btn {
  background: linear-gradient(
    135deg,
    var(--primary) 0%,
    var(--primary-dark) 100%
  );
  color: white;
  border: none;
  padding: 1rem 2rem;
  border-radius: 0.75rem;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.check-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px hsla(202, 85%, 61%, 0.3);
}

.check-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.loading {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.loading.active {
  display: flex;
}

.spinner {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid #ffffff40;
  border-top: 2px solid #ffffff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.results-card {
  background: var(--bg-white);
  border-radius: 1rem;
  box-shadow: var(--box-shadow);
  overflow: hidden;
  margin-bottom: 2rem;
}

.results-card.hidden {
  display: none;
}

.results-header {
  padding: 1.5rem 2rem;
  border-bottom: 2px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.results-summary {
  flex: 1;
}

.results-title {
  color: var(--text-dark);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.results-stats {
  display: flex;
  gap: 1.25rem;
  font-size: 0.9rem;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.stat-error {
  color: var(--error-color);
}

.stat-warning {
  color: var(--warning-color);
}

.stat-success {
  color: var(--success-color);
}

.overall-score {
  background: var(--success-color);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: 0.75rem;
  text-align: center;
  min-width: 100px;
}

.score-number {
  font-size: 1.5rem;
  font-weight: 700;
}

.score-label {
  font-size: 0.8rem;
  opacity: 0.9;
}

.results-content {
  padding: 2rem;
}

.section-title {
  color: var(--text-dark);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.analyzed-text {
  background: var(--primary-light-1);
  border: 2px solid hsla(202, 85%, 61%, 0.2);
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin-bottom: 2rem;
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 1.2rem;
  line-height: 1.8;
  position: relative;
}

.text-with-highlights {
  color: var(--text-dark);
}

.highlight-error {
  background: linear-gradient(rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.2));
  border-bottom: 2px wavy var(--error-color);
  cursor: pointer;
  position: relative;
  padding: 2px 4px;
  border-radius: 3px;
}

.highlight-warning {
  background: linear-gradient(rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.2));
  border-bottom: 2px wavy var(--warning-color);
  cursor: pointer;
  position: relative;
  padding: 2px 4px;
  border-radius: 3px;
}

.highlight-suggestion {
  background: linear-gradient(rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.2));
  border-bottom: 2px dotted var(--success-color);
  cursor: pointer;
  position: relative;
  padding: 2px 4px;
  border-radius: 3px;
}

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

.issue-item {
  background: var(--bg-white);
  border: 2px solid #e2e8f0;
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.issue-item:hover {
  border-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.issue-item.error {
  border-left: 6px solid var(--error-color);
  background: linear-gradient(135deg, #fef2f2 0%, var(--bg-white) 100%);
}

.issue-item.warning {
  border-left: 6px solid var(--warning-color);
  background: linear-gradient(135deg, #fffbeb 0%, var(--bg-white) 100%);
}

.issue-item.suggestion {
  border-left: 6px solid var(--success-color);
  background: linear-gradient(135deg, #f0fdf4 0%, var(--bg-white) 100%);
}

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

.issue-type {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.issue-type.error {
  color: var(--error-color);
}

.issue-type.warning {
  color: var(--warning-color);
}

.issue-type.suggestion {
  color: var(--success-color);
}

.issue-position {
  background: rgba(0, 0, 0, 0.1);
  color: var(--text-medium);
  padding: 0.125rem 0.5rem;
  border-radius: 0.75rem;
  font-size: 0.75rem;
}

.issue-content {
  margin-bottom: 0.75rem;
}

.issue-text {
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 1.1rem;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 0.375rem;
}

.issue-description {
  color: var(--text-medium);
  font-size: 0.95rem;
  line-height: 1.4;
  margin-bottom: 0.75rem;
}

.suggestion-box {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--success-color);
  border-radius: 0.5rem;
  padding: 0.75rem;
}

.suggestion-label {
  color: var(--success-color);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}

.suggestion-text {
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 1.1rem;
  color: var(--text-dark);
}

.examples-section {
  background: var(--bg-white);
  border-radius: 1rem;
  box-shadow: var(--box-shadow);
  padding: 2rem;
}

.example-item {
  background: var(--primary-light-1);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-bottom: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.example-item:hover {
  border-color: var(--primary-light);
  transform: translateY(-2px);
}

.example-japanese {
  font-size: 1.1rem;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
}

.example-desc {
  color: var(--text-medium);
  font-size: 0.9rem;
  font-style: italic;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@media (max-width: 768px) {
  #nihonez-primary .container {
    padding: 0 1rem;
  }

  .header h1 {
    font-size: 2rem;
  }

  .input-card,
  .results-content,
  .examples-section {
    padding: 1.5rem;
  }

  .results-header {
    flex-direction: column;
    align-items: stretch;
  }

  .results-stats {
    justify-content: space-between;
  }

  .overall-score {
    margin-top: 1rem;
    align-self: center;
  }
}