/* T.ONE 스타일 공통 레이아웃 */
:root {
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --border: #e8eaed;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;
  --sidebar-width: 72px;
  --header-height: 56px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

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

/* 좌측 사이드바 */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: #ffffff;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem 0;
  box-shadow: 1px 0 0 rgba(0, 0, 0, 0.04);
}

.sidebar-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.sidebar-nav a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  transition: all 0.2s;
}

.sidebar-nav a:hover {
  background: #f3f4f6;
  color: var(--accent);
}

.sidebar-nav a.active {
  background: #eff6ff;
  color: var(--accent);
}

.sidebar-nav .icon {
  font-size: 1.25rem;
}

/* 메인 콘텐츠 영역 */
.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* 상단 헤더 */
.header {
  height: var(--header-height);
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-nav a {
  padding: 0.5rem 0.75rem;
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: 6px;
  transition: background 0.2s;
}

.header-nav a:hover {
  background: #f3f4f6;
}

.header-nav a.active {
  color: var(--accent);
  font-weight: 500;
}

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

.header-time {
  font-size: 0.85rem;
  color: var(--muted);
}

.header-user {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.header-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
}

/* 콘텐츠 본문 */
.content {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
}

.content-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 1rem;
  color: var(--text);
}

/* 카드 스타일 */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* 그리드 */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
}