:root {
    --primary-blue: #2563eb;
    --dark-blue: #1e3a8a;
    --success-green: #22c55e;
    --danger-red: #ef4444;
    --bg-gray: #f8fafc;
    --accent-purple: #8b5cf6; /* 조식 강조용 보라색 */
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Pretendard', sans-serif; }
body { background-color: var(--bg-gray); color: #334155; }

header { background: var(--dark-blue); color: white; padding: 1.5rem 1rem; text-align: center; }
nav { margin-top: 15px; display: flex; justify-content: center; gap: 10px; }
nav button { 
    padding: 10px 20px; border: none; border-radius: 25px; cursor: pointer;
    background: rgba(255,255,255,0.2); color: white; transition: 0.3s;
}
nav button.active { background: white; color: var(--dark-blue); font-weight: bold; }

.view { padding: 20px; max-width: 600px; margin: 0 auto; }
.hidden { display: none; }
.card { background: white; border-radius: 12px; padding: 20px; margin-bottom: 20px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
h3 { margin-bottom: 15px; color: var(--dark-blue); font-size: 1rem; border-left: 4px solid var(--primary-blue); padding-left: 10px; }

/* 객실 카드 공통 스타일 */
.grid-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: 12px; }
.room-card { padding: 18px 5px; border-radius: 10px; text-align: center; border: 2px solid #e2e8f0; font-size: 0.9rem; background: white; transition: 0.2s; cursor: pointer; }
.room-card.status-busy { background: #dbeafe; color: #1e40af; border-color: #3b82f6; }
.room-card.status-cleaning { background: #fef3c7; color: #92400e; border-color: #f59e0b; }
.room-card.status-done { background: var(--success-green); color: white; border-color: #16a34a; }

/* 예약 & 비품 컨트롤 공통 */
.booking-controls, .inventory-controls { display: flex; flex-direction: column; gap: 10px; margin-bottom: 15px; }
.input-row { display: flex; gap: 5px; }
.input-row input { flex: 1; }
input, select { padding: 10px; border: 1px solid #e2e8f0; border-radius: 8px; font-size: 0.9rem; }

/* 버튼 스타일 */
button#add-booking, button#add-inventory { 
    background: var(--primary-blue); color: white; border: none; padding: 12px; border-radius: 8px; font-weight: bold; cursor: pointer;
}
.btn-sm { padding: 5px 8px; font-size: 0.75rem; border-radius: 4px; border: 1px solid #cbd5e1; background: #fff; cursor: pointer; margin: 2px; }
.btn-sm:hover { background: #f1f5f9; }

/* 테이블 스타일 */
.inventory-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.inventory-table th { background: #f8fafc; color: #64748b; font-weight: 600; font-size: 0.8rem; text-transform: uppercase; }
.inventory-table th, .inventory-table td { padding: 12px 8px; text-align: center; border-bottom: 1px solid #f1f5f9; }
small { color: #94a3b8; font-size: 0.75rem; }

/* 대시보드 요약 */
.summary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 20px; }
.summary-item { background: var(--primary-blue); color: white; padding: 18px; border-radius: 15px; text-align: center; }
.summary-item.danger { background: #f87171; }
.summary-item.breakfast { background: var(--accent-purple); }
.summary-item h4 { font-size: 0.85rem; opacity: 0.9; margin-bottom: 5px; }
.summary-item p { font-size: 1.4rem; font-weight: bold; }

/* 부족 비품 강조 */
.row-danger { color: var(--danger-red); font-weight: bold; background-color: #fff5f5; }

/* =========================================
   [추가] 날짜별 조식 및 입력창 관련 스타일
   ========================================= */
.breakfast-summary-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f1f5f9;
    padding: 15px;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
}
.breakfast-summary-bar input[type="date"] {
    border: 1px solid #cbd5e1;
    padding: 5px 10px;
    border-radius: 6px;
    outline: none;
}
.summary-text { font-weight: bold; color: var(--dark-blue); }
#day-breakfast-info { color: var(--accent-purple); font-size: 1.1rem; }

/* 예약 입력창 행 간격 보정 */
.booking-controls .input-row {
    margin-bottom: 2px;
}

/* 사장님 뷰 조식 대상 강조 */
.inventory-table td span {
    font-size: 0.85rem;
    background: #f3e8ff;
    padding: 2px 6px;
    border-radius: 4px;
}