/* ===================================
   Tool: diff-checker
   Diff比較ツール専用スタイル
   ================================== */

/* ===========================================
   Stats Grid
   =========================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.stat-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 1.5rem;
  font-weight: 700;
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
}

.stat-added .stat-icon {
  background: rgba(46, 160, 67, 0.15);
  color: #2ea043;
}

.stat-removed .stat-icon {
  background: rgba(248, 81, 73, 0.15);
  color: #f85149;
}

.stat-changed .stat-icon {
  background: rgba(210, 153, 34, 0.15);
  color: #d29922;
}

.stat-unchanged .stat-icon {
  background: var(--sage-100);
  color: var(--sage-500);
}

.stat-content {
  flex: 1;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 4px;
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
}

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

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-card {
    padding: var(--space-md);
  }

  .stat-icon {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
  }

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

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }

  .stat-card {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
  }
}

/* ===========================================
   Input Section
   =========================================== */
.input-section {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.input-panel {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.input-panel:focus-within {
  border-color: var(--green-main);
  box-shadow: var(--shadow-glow);
}

.input-panel.drag-over {
  border-color: var(--green-main);
  background: var(--green-pale);
}

.input-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--sage-50);
  border-bottom: 1px solid var(--border-color);
}

.input-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.input-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
}

.input-badge.old {
  background: linear-gradient(135deg, #f85149, #da3633);
}

.input-badge.new {
  background: linear-gradient(135deg, #2ea043, #238636);
}

.input-actions {
  display: flex;
  gap: var(--space-xs);
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--sage-100);
  color: var(--text-primary);
}

.text-input {
  flex: 1;
  min-height: 250px;
  padding: var(--space-md) var(--space-lg);
  border: none;
  background: transparent;
  font-family: 'SF Mono', 'Consolas', 'Monaco', 'Menlo', monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-primary);
  resize: vertical;
}

.text-input:focus {
  outline: none;
}

.text-input::placeholder {
  color: var(--text-muted);
}

.input-footer {
  display: flex;
  justify-content: flex-end;
  padding: var(--space-sm) var(--space-lg);
  background: var(--sage-50);
  border-top: 1px solid var(--border-color);
}

.char-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: 'SF Mono', 'Consolas', monospace;
}

/* Input Divider */
.input-divider {
  display: flex;
  align-items: center;
  justify-content: center;
}

.swap-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--border-color);
  background: var(--bg-card);
  border-radius: 50%;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.swap-btn:hover {
  border-color: var(--green-main);
  color: var(--green-main);
  transform: rotate(180deg);
}

@media (max-width: 900px) {
  .input-section {
    grid-template-columns: 1fr;
  }

  .input-divider {
    padding: var(--space-sm) 0;
  }

  .swap-btn {
    transform: rotate(90deg);
  }

  .swap-btn:hover {
    transform: rotate(270deg);
  }
}

/* ===========================================
   Options Bar
   =========================================== */
.options-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-bottom: var(--space-xl);
}

.options-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.option-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.option-item:hover {
  color: var(--text-primary);
}

.option-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--green-main);
  cursor: pointer;
}

.compare-actions {
  display: flex;
  gap: var(--space-md);
}

.btn-compare {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
}

@media (max-width: 600px) {
  .options-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .options-group {
    justify-content: center;
  }

  .compare-actions {
    justify-content: center;
  }

  .btn-compare {
    width: 100%;
    justify-content: center;
  }
}

/* ===========================================
   View Toggle
   =========================================== */
.view-toggle {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  padding: var(--space-xs);
  background: var(--sage-100);
  border-radius: var(--radius-lg);
  width: fit-content;
}

.view-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.view-btn:hover {
  color: var(--text-primary);
}

.view-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 600px) {
  .view-toggle {
    width: 100%;
    overflow-x: auto;
  }

  .view-btn {
    flex: 1;
    justify-content: center;
    white-space: nowrap;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8rem;
  }

  .view-btn svg {
    display: none;
  }
}

/* ===========================================
   Result Section
   =========================================== */
.result-section {
  margin-bottom: var(--space-xl);
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.result-header h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
}

.result-actions {
  display: flex;
  gap: var(--space-sm);
}

/* ===========================================
   Diff Container
   =========================================== */
.diff-container {
  background: #0d1117;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid #30363d;
}

.diff-container.sidebyside {
  display: flex;
}

.diff-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.diff-panel:first-child {
  border-right: 1px solid #30363d;
}

.diff-panel-header {
  padding: var(--space-sm) var(--space-md);
  background: #161b22;
  color: #8b949e;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid #30363d;
}

.diff-content {
  overflow: auto;
  max-height: 500px;
  font-family: 'SF Mono', 'Consolas', 'Monaco', 'Menlo', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
}

/* Diff Lines */
.diff-line {
  display: flex;
  min-height: 24px;
  border-bottom: 1px solid rgba(48, 54, 61, 0.5);
}

.diff-line:last-child {
  border-bottom: none;
}

.line-num {
  min-width: 50px;
  padding: 0 var(--space-sm);
  text-align: right;
  color: #484f58;
  user-select: none;
  background: rgba(22, 27, 34, 0.5);
  border-right: 1px solid #30363d;
  font-size: 0.8rem;
}

.unified .line-num {
  min-width: 40px;
}

.unified .line-num.old {
  border-right: none;
}

.line-prefix {
  min-width: 20px;
  padding: 0 var(--space-xs);
  text-align: center;
  font-weight: 700;
  user-select: none;
}

.line-content {
  flex: 1;
  padding: 0 var(--space-md);
  white-space: pre-wrap;
  word-break: break-all;
  color: #c9d1d9;
}

/* Line Types */
.diff-line.equal {
  background: transparent;
}

.diff-line.added {
  background: rgba(46, 160, 67, 0.15);
}

.diff-line.added .line-content {
  color: #3fb950;
}

.diff-line.added .line-prefix {
  color: #3fb950;
}

.diff-line.removed {
  background: rgba(248, 81, 73, 0.15);
}

.diff-line.removed .line-content {
  color: #f85149;
}

.diff-line.removed .line-prefix {
  color: #f85149;
}

.diff-line.changed {
  background: rgba(210, 153, 34, 0.1);
}

.diff-line.empty {
  background: rgba(110, 118, 129, 0.1);
}

.diff-line.empty .line-content {
  color: transparent;
}

/* Character-level diff */
.char-added {
  background: rgba(46, 160, 67, 0.4);
  border-radius: 2px;
  padding: 0 1px;
}

.char-removed {
  background: rgba(248, 81, 73, 0.4);
  border-radius: 2px;
  padding: 0 1px;
  text-decoration: line-through;
}

/* Inline View */
.inline-view .diff-line.inline-removed {
  background: rgba(248, 81, 73, 0.1);
}

.inline-view .diff-line.inline-removed del {
  background: rgba(248, 81, 73, 0.3);
  text-decoration: line-through;
  color: #f85149;
}

.inline-view .diff-line.inline-added {
  background: rgba(46, 160, 67, 0.1);
}

.inline-view .diff-line.inline-added ins {
  background: rgba(46, 160, 67, 0.3);
  text-decoration: none;
  color: #3fb950;
}

.inline-view .diff-line.inline-changed {
  background: rgba(210, 153, 34, 0.1);
}

.inline-view .diff-line.inline-changed del {
  background: rgba(248, 81, 73, 0.3);
  text-decoration: line-through;
  color: #f85149;
}

.inline-view .diff-line.inline-changed ins {
  background: rgba(46, 160, 67, 0.3);
  text-decoration: none;
  color: #3fb950;
}

@media (max-width: 768px) {
  .diff-container.sidebyside {
    flex-direction: column;
  }

  .diff-panel:first-child {
    border-right: none;
    border-bottom: 1px solid #30363d;
  }

  .diff-content {
    max-height: 300px;
  }

  .line-num {
    min-width: 35px;
    font-size: 0.75rem;
  }

  .line-content {
    font-size: 0.8rem;
  }
}

/* ===========================================
   No Diff Message
   =========================================== */
.no-diff-message {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-bottom: var(--space-xl);
}

.no-diff-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--green-pale), var(--teal-pale));
  border-radius: 50%;
  font-size: 2.5rem;
  color: var(--green-main);
}

.no-diff-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.no-diff-subtext {
  color: var(--text-muted);
}

/* ===========================================
   Sidebar Section
   =========================================== */
.sidebar-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.sidebar-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.sidebar-card h3 {
  font-size: 1rem;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

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

.usage-list li {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.usage-list li:last-child {
  border-bottom: none;
}

.usage-icon {
  font-size: 1.25rem;
}

.usage-list strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.usage-list p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.4;
}

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

.tips-list li {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.tips-list li:last-child {
  border-bottom: none;
}

.tip-badge {
  display: inline-block;
  padding: 2px 8px;
  background: var(--green-pale);
  color: var(--green-dark);
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.tips-list p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.privacy-card {
  background: linear-gradient(135deg, var(--green-pale), var(--teal-pale));
  border-color: var(--green-mist);
}

.privacy-card h3 {
  color: var(--green-dark);
}

.privacy-card p {
  font-size: 0.85rem;
  color: var(--sage-600);
  margin: 0;
  line-height: 1.6;
}

/* ===========================================
   Features Section
   =========================================== */
.features-section {
  margin-bottom: var(--space-xl);
}

.features-section h2 {
  font-size: 1.25rem;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--green-main);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.feature-card h3 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.feature-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

/* ===========================================
   Guide Section
   =========================================== */
.guide-section {
  margin-bottom: var(--space-xl);
}

.guide-section h2 {
  font-size: 1.25rem;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.guide-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.guide-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.guide-icon {
  font-size: 1.5rem;
}

.guide-header h3 {
  font-size: 1rem;
  color: var(--text-primary);
  margin: 0;
}

.guide-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.guide-card li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.guide-card li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--green-main);
  font-weight: bold;
}

.guide-card li:last-child {
  margin-bottom: 0;
}

/* ===========================================
   Pro Tips Section
   =========================================== */
.pro-tips-section {
  margin-bottom: var(--space-xl);
}

.pro-tips-section h2 {
  font-size: 1.25rem;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}

.pro-tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.pro-tip-card {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  color: #e0e0e0;
  position: relative;
  overflow: hidden;
}

.pro-tip-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(46, 158, 125, 0.2) 0%, transparent 70%);
}

.pro-tip-number {
  font-size: 3rem;
  font-weight: 800;
  color: rgba(46, 158, 125, 0.3);
  line-height: 1;
  margin-bottom: var(--space-sm);
  font-family: 'SF Mono', 'Consolas', monospace;
}

.pro-tip-card h3 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: var(--space-sm);
}

.pro-tip-card p {
  font-size: 0.85rem;
  color: #a0a0a0;
  margin: 0;
  line-height: 1.6;
}

.pro-tip-card kbd {
  display: inline-block;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  font-family: 'SF Mono', 'Consolas', monospace;
  font-size: 0.8rem;
  color: #fff;
}

/* ===========================================
   History Section
   =========================================== */
.history-section {
  margin-bottom: var(--space-xl);
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.history-header h2 {
  font-size: 1.1rem;
  color: var(--text-primary);
}

.history-list {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.history-empty {
  padding: var(--space-xl);
  text-align: center;
  color: var(--text-muted);
}

.history-item {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

.history-item:hover {
  background: var(--sage-50);
}

.history-preview {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
  font-family: 'SF Mono', 'Consolas', monospace;
  font-size: 0.85rem;
}

.history-old {
  color: #f85149;
  max-width: 40%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-arrow {
  color: var(--text-muted);
}

.history-new {
  color: #3fb950;
  max-width: 40%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.history-stats {
  font-family: 'SF Mono', 'Consolas', monospace;
}

/* ===========================================
   FAQ Section
   =========================================== */
.faq-section {
  margin-bottom: var(--space-xl);
}

.faq-section h2 {
  font-size: 1.25rem;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}

.faq-list {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--sage-50);
}

.faq-icon {
  color: var(--text-muted);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
}

.faq-answer p {
  margin-bottom: var(--space-sm);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-answer ul {
  margin: var(--space-sm) 0;
  padding-left: var(--space-lg);
}

.faq-answer li {
  margin-bottom: var(--space-xs);
}

.color-sample {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 3px;
  vertical-align: middle;
  margin-right: var(--space-xs);
}

.color-sample.added {
  background: #3fb950;
}

.color-sample.removed {
  background: #f85149;
}

.color-sample.changed {
  background: #d29922;
}

/* ===========================================
   Toast
   =========================================== */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: var(--space-md) var(--space-xl);
  background: var(--dark-forest);
  color: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all var(--transition-normal);
  z-index: 1000;
  white-space: nowrap;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.error {
  background: #da3633;
}

/* ===========================================
   Buttons (extending common styles)
   =========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--green-main) 0%, var(--teal) 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(46, 158, 125, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46, 158, 125, 0.4);
}

.btn-secondary {
  background: var(--sage-100);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--sage-200);
  border-color: var(--border-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  background: var(--sage-100);
  color: var(--text-primary);
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: 0.8rem;
}