:root {
            --bg-color: #f3f4f6;
            --card-bg: #ffffff;
            --text-main: #1f2937;
            --text-muted: #6b7280;
            --primary: #4f46e5;
            --primary-hover: #4338ca;
            --danger: #ef4444;
            --btn-bg: #f3f4f6;
            --btn-hover: #e5e7eb;
            --radius: 12px;
        }

        body {
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-main);
            display: flex;
            justify-content: center;
            padding: 2rem 1rem;
            margin: 0;
        }

        .container {
            background-color: var(--card-bg);
            width: 100%;
            max-width: 750px;
            border-radius: var(--radius);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            padding: 2rem;
        }

        h1 {
            margin-top: 0;
            font-size: 1.5rem;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .status {
            font-size: 0.8rem;
            color: #10b981;
            font-weight: normal;
        }

        .inventory-list {
            list-style: none;
            padding: 0;
            margin: 0 0 2rem 0;
        }

        .inventory-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            border-bottom: 1px solid #e5e7eb;
        }

        .inventory-item:last-child {
            border-bottom: none;
        }

        .item-name {
            font-weight: 600;
            font-size: 1.1rem;
        }

        .controls {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-circle {
            background-color: var(--btn-bg);
            border: none;
            color: var(--text-main);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            font-size: 1.2rem;
            font-weight: bold;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
        }

        .btn-circle:hover {
            background-color: var(--btn-hover);
        }

        .btn-circle:active {
            transform: scale(0.95);
        }

        .quantity {
            font-size: 1.2rem;
            font-weight: bold;
            min-width: 30px;
            text-align: center;
        }

        .add-form {
            display: flex;
            gap: 10px;
            margin-top: 1rem;
            padding-top: 1.5rem;
            border-top: 2px dashed #e5e7eb;
        }

        input {
            flex: 1;
            padding: 0.75rem 1rem;
            border: 1px solid #d1d5db;
            border-radius: 8px;
            font-size: 1rem;
            outline: none;
        }

        input:focus {
            border-color: var(--primary);
        }

        .btn-primary {
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            padding: 0 1.2rem;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
        }
        
        .delete-btn {
            background: none;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            font-size: 1.2rem;
            padding: 5px;
            margin-left: 10px;
        }
        
        .delete-btn:hover {
            color: var(--danger);
        }