/* ===== 전역 스타일 ===== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #293548;
  --bg-hover: #334155;
  --border-color: #334155;
  --border-light: #3E4F68;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --accent-blue: #3B82F6;
  --accent-blue-dark: #2563EB;
  --accent-blue-light: #60A5FA;
  --accent-indigo: #6366F1;
  --success: #22C55E;
  --success-dark: #16A34A;
  --warning: #F59E0B;
  --warning-dark: #D97706;
  --danger: #EF4444;
  --danger-dark: #DC2626;
  --purple: #A855F7;
  --cyan: #06B6D4;
  --sidebar-width: 240px;
  --sidebar-collapsed: 72px;
  --header-height: 60px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --transition: all 0.2s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ===== 스크롤바 ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== 레이아웃 ===== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ===== 사이드바 ===== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 100;
  transition: var(--transition);
  overflow: hidden;
}

.sidebar-logo {
  padding: 20px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: var(--header-height);
}

.sidebar-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.sidebar-logo-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.sidebar-logo-text span {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
  display: block;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.nav-section-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 8px 10px 4px;
  margin-top: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  margin-bottom: 2px;
  white-space: nowrap;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue-light);
  font-weight: 600;
}

.nav-item.active .nav-icon {
  color: var(--accent-blue);
}

.nav-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.nav-badge {
  margin-left: auto;
  background: var(--accent-blue);
  color: white;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 10px;
}

.sidebar-footer {
  padding: 12px 8px;
  border-top: 1px solid var(--border-color);
}

.sidebar-footer-info {
  padding: 10px 12px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ===== 메인 콘텐츠 ===== */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.page-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 28px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.page-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-header-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.page-header-subtitle {
  font-size: 12px;
  color: var(--text-muted);
}

.page-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-body {
  padding: 28px;
  flex: 1;
}

/* ===== 카드 ===== */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.card-sm { padding: 16px; }
.card-lg { padding: 32px; }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== 버튼 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  border: none;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--accent-blue);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-blue-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59,130,246,0.4);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-hover);
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background: var(--success-dark);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
}

/* ===== 입력 폼 ===== */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  padding: 10px 14px;
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

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

.form-control-lg {
  padding: 14px 18px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748B' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.input-group {
  display: flex;
  gap: 0;
}

.input-group .form-control {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  border-right: none;
  flex: 1;
}

.input-group .btn {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  flex-shrink: 0;
}

/* ===== 배지 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-blue { background: rgba(59,130,246,0.15); color: var(--accent-blue-light); }
.badge-green { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-amber { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-red { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-purple { background: rgba(168,85,247,0.15); color: var(--purple); }
.badge-cyan { background: rgba(6,182,212,0.15); color: var(--cyan); }
.badge-gray { background: rgba(100,116,139,0.15); color: var(--text-muted); }

/* ===== 그리드 ===== */
.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* ===== 통계 카드 ===== */
.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--stat-color, var(--accent-blue));
}

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

.stat-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(var(--stat-rgb, 59,130,246), 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 4px;
}

.stat-card-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-card-value {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.stat-card-value.large { font-size: 32px; }

.stat-card-change {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== 로딩 ===== */
.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 60px 20px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 18px;
  height: 18px;
  border-width: 2px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  color: var(--text-muted);
  font-size: 14px;
  text-align: center;
}

.loading-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 300px;
}

.loading-step {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.loading-step.active { color: var(--accent-blue-light); }
.loading-step.done { color: var(--success); }

.loading-step-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-color);
  flex-shrink: 0;
}

.loading-step.active .loading-step-dot {
  background: var(--accent-blue);
  animation: pulse 1s ease-in-out infinite;
}

.loading-step.done .loading-step-dot { background: var(--success); }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

/* ===== 프로그레스 바 ===== */
.progress-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent-blue);
  border-radius: 4px;
  transition: width 1s ease;
}

.progress-fill.success { background: var(--success); }
.progress-fill.warning { background: var(--warning); }
.progress-fill.danger { background: var(--danger); }

/* ===== 테이블 ===== */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

td {
  padding: 14px 16px;
  font-size: 14px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

tr:last-child td { border-bottom: none; }

tr:hover td { background: rgba(255,255,255,0.02); }

/* ===== 알림/토스트 ===== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-lg);
  pointer-events: all;
  animation: slideInRight 0.3s ease;
  max-width: 360px;
  font-size: 14px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info { border-left: 3px solid var(--accent-blue); }

@keyframes slideInRight {
  from { transform: translateX(100px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100px); opacity: 0; }
}

/* ===== 섹션 구분 ===== */
.section-divider {
  height: 1px;
  background: var(--border-color);
  margin: 24px 0;
}

/* ===== 탭 ===== */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.tab-item {
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  margin-bottom: -1px;
}

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

.tab-item.active {
  color: var(--accent-blue-light);
  border-bottom-color: var(--accent-blue);
  font-weight: 600;
}

/* ===== 빈 상태 ===== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 60px 20px;
  color: var(--text-muted);
  text-align: center;
}

.empty-state-icon {
  font-size: 48px;
  opacity: 0.5;
}

.empty-state-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
}

.empty-state-desc {
  font-size: 14px;
  max-width: 320px;
}

/* ===== 게이지 차트 ===== */
.gauge-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.gauge-svg {
  transform: rotate(-90deg);
}

.gauge-value {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-primary);
}

.gauge-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 등급 배지 ===== */
.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 16px;
  font-weight: 800;
}

.grade-S { background: linear-gradient(135deg, #F59E0B, #EF4444); color: white; }
.grade-A { background: linear-gradient(135deg, #3B82F6, #6366F1); color: white; }
.grade-B { background: linear-gradient(135deg, #22C55E, #06B6D4); color: white; }
.grade-C { background: linear-gradient(135deg, #64748B, #94A3B8); color: white; }
.grade-D { background: rgba(100,116,139,0.3); color: var(--text-muted); }

/* ===== 가능성 배지 ===== */
.possibility-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
}

.possibility-possible {
  background: rgba(34,197,94,0.15);
  color: var(--success);
  border: 1px solid rgba(34,197,94,0.3);
}

.possibility-challenge {
  background: rgba(245,158,11,0.15);
  color: var(--warning);
  border: 1px solid rgba(245,158,11,0.3);
}

.possibility-hard {
  background: rgba(239,68,68,0.15);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.3);
}

/* ===== 키워드 카드 ===== */
.keyword-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: var(--transition);
  cursor: pointer;
}

.keyword-card:hover {
  border-color: var(--accent-blue);
  background: rgba(59,130,246,0.05);
}

.keyword-card.recommended {
  border-color: rgba(34,197,94,0.3);
  background: rgba(34,197,94,0.05);
}

.keyword-card-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.keyword-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== 트렌드 차트 ===== */
.trend-chart {
  width: 100%;
  height: 200px;
  position: relative;
}

/* ===== 원고 결과 ===== */
.outline-section {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 8px;
}

.outline-h2 {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent-blue-light);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.outline-h3 {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0 4px 24px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.outline-h3::before {
  content: '└';
  color: var(--text-muted);
}

.title-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: var(--transition);
  cursor: pointer;
}

.title-card:hover {
  border-color: var(--accent-blue);
  background: rgba(59,130,246,0.05);
}

.title-card-text {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.5;
}

.title-card-type {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ===== 히스토리 ===== */
.history-filters {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: flex-end;
}

/* ===== 유틸리티 ===== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.gap-8 { gap: 32px; }
.flex-1 { flex: 1; }
.w-full { width: 100%; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 12px; }
.text-lg { font-size: 16px; }
.text-xl { font-size: 20px; }
.text-2xl { font-size: 24px; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-blue { color: var(--accent-blue-light); }
.text-green { color: var(--success); }
.text-amber { color: var(--warning); }
.text-red { color: var(--danger); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hidden { display: none !important; }
.rounded { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.overflow-hidden { overflow: hidden; }
.relative { position: relative; }

/* ===== API 설정 모달 ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ===== API 상태 표시 ===== */
.api-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  display: inline-block;
}

.api-status-dot.connected { background: var(--success); }
.api-status-dot.disconnected { background: var(--danger); }
.api-status-dot.pending { background: var(--warning); animation: pulse 1s ease infinite; }

/* ===== 반응형 ===== */
@media (max-width: 1024px) {
  :root { --sidebar-width: 200px; }
}

@media (max-width: 768px) {
  :root { --sidebar-width: 0px; }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
    width: 240px;
  }

  .main-content { margin-left: 0; }

  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .page-body { padding: 16px; }

  .page-header { padding: 0 16px; }
}

@media (max-width: 480px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}