body {
    background-color: #0f172a;
    color: #f1f5f9;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 헤더 스타일 */
header {
    background-color: #1e293b;
    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; color: #fff; }

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); }

/* 상단 상태 배지 */
.status-group { display: flex; gap: 10px; }
.status-badge {
    font-size: 0.8rem;
    padding: 4px 12px;
    border-radius: 99px;
    background-color: #334155;
    color: #94a3b8;
    font-weight: 700;
    display: flex; align-items: center; gap: 6px; border: 1px solid #475569;
}
.dot { width: 6px; height: 6px; border-radius: 50%; background-color: #94a3b8; }
.status-badge.on { background-color: #064e3b; color: #34d399; border-color: #059669; }
.status-badge.on .dot { background-color: #34d399; box-shadow: 0 0 4px #34d399; }
.status-badge.off { background-color: #450a0a; color: #f87171; border-color: #b91c1c; }
.status-badge.off .dot { background-color: #f87171; box-shadow: 0 0 4px #f87171; }

/* --- 메인 레이아웃  --- */
main {
    padding: 20px;
    max-width: 100%;    
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
    flex: 1;
    overflow-y: hidden;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 상단 카트 요약 그리드 */
.cart-select-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    flex-shrink: 0; 
}

.cart-summary-card {
    background-color: #1e293b;
    border: 2px solid #334155;
    border-radius: 12px;
    padding: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 10px;
    position: relative;
}

.cart-summary-card:hover { transform: translateY(-2px); border-color: #64748b; }

.cart-summary-card.selected {
    border-color: #3b82f6;
    background-color: #1e293b;
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.2);
}

.summary-header { display: flex; justify-content: space-between; align-items: center; }
.summary-name { font-weight: 700; color: #fff; font-size: 1rem; }
.summary-status-dot { width: 8px; height: 8px; border-radius: 50%; background-color: #475569; }
.summary-status-dot.online { background-color: #10b981; box-shadow: 0 0 5px #10b981; }
.summary-status-dot.warning { background-color: #e45d0f; box-shadow: 0 0 5px #e45d0f; }
.summary-status-dot.offline { background-color: #fa0303; box-shadow: 0 0 5px #e45d0f;}

.summary-row { display: flex; justify-content: space-between; font-size: 0.85rem; color: #94a3b8; }
.summary-val { color: #f1f5f9; font-weight: 600; }

/* 하단 상세 패널 */
.cart-panel {
    flex: 1; 
    background-color: #1e293b;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    border: 2px solid #334155;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0; 
}

.panel-header {
    background-color: #0f172a;
    padding: 15px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #334155;
    flex-shrink: 0;
}
.cart-info { display: flex; align-items: center; gap: 10px; }
.cart-icon { font-size: 1.5rem; }
.cart-name { font-size: 1.2rem; font-weight: 800; color: #fff; }
.panel-status { font-weight: 700; font-size: 0.95rem; color: #64748b; }

/* --- 패널 내부 비율 (4:6) --- */
.panel-body {
    display: flex;
    flex: 1; 
    overflow: hidden; 
    flex-direction: row; 
}

/* 왼쪽 영역 (정보) */
.panel-left {
    flex: 4; 
    display: flex;
    flex-direction: column;
    border-right: 1px solid #334155;
    min-width: 320px; 
    overflow-y: auto; 
}

/* 오른쪽 영역 (지도) */
.panel-right {
    flex: 6; 
    background-color: #0f172a;
    display: flex;
    flex-direction: column;
    padding: 20px;
    min-width: 0;
}

/* 센서 그리드 */
.sensor-grid {
    padding: 25px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 15px;
    border-bottom: 1px solid #334155;
    flex-shrink: 0;
}
.data-box {
    background-color: #28364d;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    display: flex; flex-direction: column; justify-content: center;
}
.data-label { font-size: 0.9rem; color: #94a3b8; margin-bottom: 5px; font-weight: 600; }
.data-value { font-size: 1.8rem; font-weight: 800; color: #fff; }
.unit { font-size: 0.9rem; color: #64748b; font-weight: 500; margin-left: 3px; }

.val-normal { color: #38bdf8; }
.val-warning { color: #f87171; }
.val-success { color: #34d399; }
.val-offline { color: #64748b; }

/* 아이템 리스트 */
.items-section { 
    padding: 25px; 
    background-color: #1e293b; 
    flex: 1; 
    display: flex; 
    flex-direction: column; 
}
.items-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.items-title { font-size: 1.1rem; font-weight: 700; color: #e2e8f0; }
.items-summary { font-size: 0.95rem; color: #94a3b8; font-weight: 600; }
.total-price { color: #34d399; font-weight: 800; font-size: 1.1rem; margin-left: 8px; }

.table-scroll-box {
    flex: 1; overflow-y: auto; 
    border: 1px solid #334155; border-radius: 8px;
    background-color: #1e293b;
    min-height: 150px; 
}
.table-scroll-box::-webkit-scrollbar { width: 8px; }
.table-scroll-box::-webkit-scrollbar-track { background: #1e293b; }
.table-scroll-box::-webkit-scrollbar-thumb { background: #475569; border-radius: 4px; }

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

/* 지도 헤더 */
.map-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-shrink: 0;
}
.map-title { font-size: 1.1rem; font-weight: 700; color: #e2e8f0; }
.map-coords { font-family: monospace; color: #34d399; font-size: 0.9rem; }

/* 캔버스 컨테이너 */
.canvas-container {
    flex: 1;
    background-color: #020617; 
    border: 1px solid #334155;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    background-color: transparent;
    width: 100%;
    height: 100%;
    object-fit: contain; 
}