/* --- 다크 모드 기본 스타일 --- */
body { 
    background-color: #0f172a; 
    color: #f1f5f9; 
    font-family: 'Pretendard', sans-serif; 
    margin: 0; 
    padding: 0; 
    height: 100vh; 
    display: flex; 
    flex-direction: column; 
    overflow: hidden; 
}

/* --- 헤더 --- */
header { 
    background-color: #1e293b; 
    color: #fff; 
    border-bottom: 1px solid #334155; 
    padding: 0 30px; 
    height: 60px; 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    flex-shrink: 0; 
}
.logo { font-weight: 800; font-size: 1.3rem; margin-right: 40px; }

nav { display: flex; gap: 10px; flex: 1; }
.nav-btn { text-decoration: none; color: #94a3b8; font-weight: 600; padding: 8px 16px; border-radius: 8px; transition: all 0.2s; font-size: 0.9rem; }
.nav-btn:hover { background-color: #334155; color: #fff; }
.nav-btn.active { background-color: #3b82f6; color: #fff; box-shadow: 0 0 10px rgba(59, 130, 246, 0.3); }

.container { display: flex; flex-direction: column; flex: 1; min-height: 0; padding: 20px; gap: 20px; box-sizing: border-box; }

/* 다크 모드 섹션 스타일 */
.inventory-section { 
    flex: 1; 
    background: #1e293b; 
    border-radius: 12px; 
    box-shadow: 0 4px 6px rgba(0,0,0,0.2); 
    display: flex; 
    flex-direction: column; 
    overflow: hidden; 
    border: 1px solid #334155; 
}

.section-header { 
    padding: 15px 20px; 
    border-bottom: 1px solid #334155; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    font-weight: 700; 
    font-size: 1.1rem; 
    color: #e2e8f0; 
    background-color: #0f172a; 
}

.table-wrapper { flex: 1; overflow-y: auto; }

/* 다크 모드 테이블 */
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th { 
    position: sticky; top: 0; 
    background-color: #0f172a; 
    color: #94a3b8; 
    padding: 12px 20px; 
    text-align: left; 
    border-bottom: 2px solid #334155; 
    font-size: 0.85rem; 
    font-weight: 700; 
    z-index: 10; 
}
td { 
    padding: 12px 20px; 
    border-bottom: 1px solid #334155; 
    color: #f1f5f9; 
    vertical-align: middle; 
}
tr:hover td { background-color: #334155; }

.sortable { cursor: pointer; user-select: none; transition: color 0.2s; }
.sortable:hover { color: #3b82f6; background-color: #1e293b; }

/* 다크 모드 배지 스타일 */
.badge { padding: 4px 10px; border-radius: 6px; font-size: 0.8rem; font-weight: 700; display: inline-block; min-width: 80px; text-align: center; }

.expiry-expired { background-color: #450a0a; color: #f87171; border: 1px solid #b91c1c; } /* 만료 */
.expiry-warning { background-color: #422006; color: #fbbf24; border: 1px solid #b45309; } /* 임박 */
.expiry-good { background-color: #064e3b; color: #34d399; border: 1px solid #059669; }    /* 안전 */

.stock-badge { padding: 4px 10px; border-radius: 6px; font-size: 0.8rem; font-weight: 700; display: inline-block; text-align: center; }
.stock-low { background-color: #450a0a; color: #f87171; border: 1px solid #b91c1c; }
.stock-normal { background-color: #334155; color: #94a3b8; border: 1px solid #475569; }

/* 매출 섹션 */
.sales-section { flex: 1; display: flex; gap: 20px; min-height: 0; }
.kpi-container { display: flex; flex-direction: column; gap: 15px; width: 250px; flex-shrink: 0; }

.kpi-card { 
    background: #1e293b; 
    border-radius: 12px; 
    padding: 20px; 
    border: 1px solid #334155; 
    box-shadow: 0 4px 6px rgba(0,0,0,0.2); 
    flex: 1; 
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
}
.kpi-title { font-size: 0.9rem; color: #94a3b8; margin-bottom: 5px; font-weight: 600; }
.kpi-value { font-size: 1.8rem; font-weight: 800; color: #fff; }
.kpi-icon { font-size: 2rem; margin-bottom: 10px; }

.chart-container { 
    flex: 1; 
    background: #1e293b; 
    border-radius: 12px; 
    border: 1px solid #334155; 
    box-shadow: 0 4px 6px rgba(0,0,0,0.2); 
    padding: 20px; 
    position: relative; 
    display: flex; 
    flex-direction: column; 
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0f172a; }
::-webkit-scrollbar-thumb { background: #475569; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #64748b; }